Relevant bibliographies by topics / Nanoparticle formation

Academic literature on the topic 'Nanoparticle formation'

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Published: 4 June 2021
Last updated: 6 September 2023

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Journal articles on the topic "Nanoparticle formation"

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Shannahan, Jonathan. "The biocorona: a challenge for the biomedical application of nanoparticles." Nanotechnology Reviews 6, no. 4 (August 28, 2017): 345–53. http://dx.doi.org/10.1515/ntrev-2016-0098.

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AbstractFormation of the biocorona on the surface of nanoparticles is a significant obstacle for the development of safe and effective nanotechnologies, especially for nanoparticles with biomedical applications. Following introduction into a biological environment, nanoparticles are rapidly coated with biomolecules resulting in formation of the nanoparticle-biocorona. The addition of these biomolecules alters the nanoparticle’s physicochemical characteristics, functionality, biodistribution, and toxicity. To synthesize effective nanotherapeutics and to more fully understand possible toxicity following human exposures, it is necessary to elucidate these interactions between the nanoparticle and the biological media resulting in biocorona formation. A thorough understanding of the mechanisms by which the addition of the biocorona governs nanoparticle-cell interactions is also required. Through elucidating the formation and the biological impact of the biocorona, the field of nanotechnology can reach its full potential. This understanding of the biocorona will ultimately allow for more effective laboratory screening of nanoparticles and enhanced biomedical applications. The importance of the nanoparticle-biocorona has been appreciated for a decade; however, there remain numerous future directions for research which are necessary for study. This perspectives article will summarize the unique challenges presented by the nanoparticle-biocorona and avenues of future needed investigation.
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Karim, Mohammad Ziaul, Md Eaqub Ali, and Sharifah Bee Abd Hamid. "Temperature Induced Formation of Goethite from Magnetite." Advanced Materials Research 1109 (June 2015): 191–94. http://dx.doi.org/10.4028/www.scientific.net/amr.1109.191.

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Over the past few decades, magnetite nanoparticle has been profusely because of their wide range of applications. The co-precipitation method is the simplest and suitable method for the preparation of this nanoparticle. It goes through several reaction steps for the formation of various phases of magnetic nanoparticles. Goethite (FeO(OH)), is one of the intermediates, and it drastically suppressed with the magnetic properties of the Fe oxide phase. In our study, it was shown that at 30°C temperature pure magnetic nanoparticles is formed. But when precipitation temperature is increase to 80°C, goethite is also present with the magnetite nanoparticle. Hence, it is deduced that precipitation temperature plays a significant role in accelerating goethite phase formation when synthesising magnetite nanoparticle by this precipitation method. Data obtained from Raman spectroscopy and XRD supported the above observation.
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SOBHAN, M. A., M. AMS, M. J. WITHFORD, and E. M. GOLDYS. "FORMATION OF COLLOIDAL GOLD NANOPARTICLES BY USING FEMTOSECOND LASER ABLATION." International Journal of Nanoscience 08, no. 01n02 (February 2009): 209–12. http://dx.doi.org/10.1142/s0219581x09005712.

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Colloidal gold nanoparticles were produced by irradiating a gold disc with a femtosecond laser beam in pure deionized water. Variation of laser fluence between 38 and 330 J/cm2 was used to control the nanoparticle size distribution. The nanoparticles produced were spherically shaped with average diameter between 9 and 10 nm. The effect of ablation time on the nanoparticle production efficiency and size distribution was also studied.
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Fomenko, Elena, Igor Altman, and Igor E. Agranovski. "Effect of External Charging on Nanoparticle Formation in a Flame." Materials 14, no. 11 (May 28, 2021): 2891. http://dx.doi.org/10.3390/ma14112891.

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This paper attempts to demonstrate the importance of the nanoparticle charge in the synthesis flame, for the mechanism of their evolution during formation processes. An investigation was made of MgO nanoparticles formed during combustion of magnesium particles. The cubic shape of nanoparticles in an unaffected flame allows for direct interpretation of results on the external flame charging, using a continuous unipolar emission of ions. It was found that the emission of negative ions applied to the flame strongly affects the nanoparticle shape, while the positive ions do not lead to any noticeable change. The demonstrated effect emphasizes the need to take into account all of the phenomena responsible for the particle charge when modeling the nanoparticle formation in flames.
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Ahmadi, R., Madaah Hosseini, and A. Masoudi. "Avrami behavior of magnetite nanoparticles formation in co-precipitation process." Journal of Mining and Metallurgy, Section B: Metallurgy 47, no. 2 (2011): 211–18. http://dx.doi.org/10.2298/jmmb110330010a.

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In this work, magnetite nanoparticles (mean particle size about 20 nm) were synthesized via coprecipitation method. In order to investigate the kinetics of nanoparticle formation, variation in the amount of reactants within the process was measured using pH-meter and atomic absorption spectroscopy (AAS) instruments. Results show that nanoparticle formation behavior can be described by Avrami equations. Transmission electron microscopy (TEM) and X-ray diffraction (XRD) were performed to study the chemical and morphological characterization of nanoparticles. Some simplifying assumptions were employed for estimating the nucleation and growth rate of magnetite nanoparticles.
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Majerič, Peter, and Rebeka Rudolf. "Advances in Ultrasonic Spray Pyrolysis Processing of Noble Metal Nanoparticles—Review." Materials 13, no. 16 (August 7, 2020): 3485. http://dx.doi.org/10.3390/ma13163485.

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In the field of synthesis and processing of noble metal nanoparticles, the study of the bottom-up method, called Ultrasonic Spray Pyrolysis (USP), is becoming increasingly important. This review analyses briefly the features of USP, to underline the physical, chemical and technological characteristics for producing nanoparticles and nanoparticle composites with Au and Ag. The main aim is to understand USP parameters, which are responsible for nanoparticle formation. There are two nanoparticle formation mechanisms in USP: Droplet-To-Particle (DTP) and Gas-To-Particle (GTP). This review shows how the USP process is able to produce Au, Ag/TiO2, Au/TiO2, Au/Fe2O3 and Ag/(Y0.95 Eu0.05)2O3 nanoparticles, and presents the mechanisms of formation for a particular type of nanoparticle. Namely, the presented Au and Ag nanoparticles are intended for use in nanomedicine, sensing applications, electrochemical devices and catalysis, in order to benefit from their properties, which cannot be achieved with identical bulk materials. The development of new noble metal nanoparticles with USP is a constant goal in Nanotechnology, with the objective to obtain increasingly predictable final properties of nanoparticles.
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Sidorova, Elena N., Ella L. Dzidziguri, Yulia P. Vinichenko, Dmitriy Yu Ozherelkov, Alexander S. Shinkaryov, Alexander A. Gromov, and Anton Yu Nalivaiko. "Metal Nanoparticles Formation from Nickel Hydroxide." Materials 13, no. 20 (October 21, 2020): 4689. http://dx.doi.org/10.3390/ma13204689.

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In this study, the mechanism of nickel nanoparticle formation from its hydroxide was analyzed. Metallic nickel nanoparticles were obtained through the hydroxide’s reduction under hydrogen. Nickel hydroxides were produced from nickel (II) nitrate hexahydrate and NaOH by deposition under various initial conditions. The influence of washing treatment on the dispersion of obtained nickel powders was studied. The washing procedure of precipitates was carried out by centrifugation, ultrasonic treatment, and decantation. X-ray diffractometry, transmission electron microscopy, low-temperature nitrogen adsorption, infrared spectroscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy methods were used for nanoparticle characterization. Based on the resulting data, a model of the Ni(OH)2 aggregate structure after deposition was proposed. The number of nickel hydroxide particles required to form one nickel nanoparticle was estimated, and a model of its formation was proposed.
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Wang, Kun, Yuqing Zhang, Lincun Jiang, Zhiyuan Li, Xin Wang, Jinwei Zhai, and Siao Zhang. "Understanding the effect of ambient gas pressure on the nanoparticle formation in electrically exploding wires." Physics of Plasmas 30, no. 3 (March 2023): 033511. http://dx.doi.org/10.1063/5.0120712.

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In this paper, a computational model characterizing the preparation of metallic nanoparticles by electrically exploding wires from the onset of current flowing through the wire to the final moment of nanoparticle formation in a gaseous environment is constructed. The computational model consists of a 1D magnetohydrodynamic model, a simplified magnetohydrodynamic model with two-temperature approximation, and a set of general dynamic equations based on the nodal approach, corresponding to the phase transition stage, plasma evolution stage, and nanoparticle growth stage, respectively. The numerical investigation on the formation of nanoparticles is performed with “cold-start” conditions. The computational predictions for the dependence of nanoparticle size on proportion under argon gas pressure of 10 kPa demonstrate that the nanoparticles of 21 nm in diameter account for the maximum proportion of 4.3%. It coincides with the experimental measurements for nanoparticles of 19 nm in diameter with the maximum proportion of 3.5%. The computational model is employed to reveal the influence of ambient gas pressures on the process of nanoparticle formation. The variation trends for parameters of exploding products, cooling rate, and nanoparticle diameter with the largest proportion on ambient gas pressures are discussed. The size distribution of nanoparticles under different argon gas pressures matches relatively well with relevant experimental data. This computational model bridges the gap between the electrically exploding wires and the growth of nanoparticles, providing theoretical support for the regulation and control technology in nanoparticle synthesization by electrically exploding wires.
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Borchardt, John K. "Controlling nanoparticle formation." Materials Today 8, no. 6 (June 2005): 15. http://dx.doi.org/10.1016/s1369-7021(05)70927-5.

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Lee, Hwankyu. "Molecular Modeling of Protein Corona Formation and Its Interactions with Nanoparticles and Cell Membranes for Nanomedicine Applications." Pharmaceutics 13, no. 5 (April 29, 2021): 637. http://dx.doi.org/10.3390/pharmaceutics13050637.

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The conformations and surface properties of nanoparticles have been modified to improve the efficiency of drug delivery. However, when nanoparticles flow through the bloodstream, they interact with various plasma proteins, leading to the formation of protein layers on the nanoparticle surface, called protein corona. Experiments have shown that protein corona modulates nanoparticle size, shape, and surface properties and, thus, influence the aggregation of nanoparticles and their interactions with cell membranes, which can increases or decreases the delivery efficiency. To complement these experimental findings and understand atomic-level phenomena that cannot be captured by experiments, molecular dynamics (MD) simulations have been performed for the past decade. Here, we aim to review the critical role of MD simulations to understand (1) the conformation, binding site, and strength of plasma proteins that are adsorbed onto nanoparticle surfaces, (2) the competitive adsorption and desorption of plasma proteins on nanoparticle surfaces, and (3) the interactions between protein-coated nanoparticles and cell membranes. MD simulations have successfully predicted the competitive binding and conformation of protein corona and its effect on the nanoparticle–nanoparticle and nanoparticle–membrane interactions. In particular, simulations have uncovered the mechanism regarding the competitive adsorption and desorption of plasma proteins, which helps to explain the Vroman effect. Overall, these findings indicate that simulations can now provide predications in excellent agreement with experimental observations as well as atomic-scale insights into protein corona formation and interactions.
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Dissertations / Theses on the topic "Nanoparticle formation"

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Maguire, Steven. "Magnetic field control of silver nanoparticle formation." Thesis, University of Ottawa (Canada), 2006. http://hdl.handle.net/10393/27390.

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Silver nanoparticles can be readily generated in micellar environments by ketyl radicals formed from the photoreduction of benzophenone in the presence of a suitable hydrogen donor. The yield of these ketyl radicals can be increased by extending the lifetime of the triplet radical pair through Zeeman splitting of the triplet sublevels in an externally applied magnetic field. This provides control over the rate of photogeneration of nanoparticles under very mild conditions. The rate of photogeneration can be monitored by the distinctive surface plasmon resonance absorption around 420 nm. In this work, micelles of sodium dodecyl sulphate (SDS) were employed, and 1,4-cyclohexadiene (1,4-CHD), an excellent hydrogen donor, was used to promote the generation of ketyl radicals. When benzophenone and a silver salt are added to this system and it is irradiated in the presence of a magnetic field, the rate of appearance of the plasmon band is enhanced. In addition to serving as a hydrogen donor, 1,4-CHD also has a stabilising influence on the nanoparticles, adsorbing onto the surface and preventing aggregation. 1,4-CHD added to a solution of nanoparticles synthesised without the diene present will even break up existing aggregates.
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Martin, Christopher Paul. "Pattern formation in self-organised nanoparticle assemblies." Thesis, University of Nottingham, 2007. http://eprints.nottingham.ac.uk/10772/.

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An extremely wide variety of self-organised nanostructured patterns can be produced by spin-casting solutions of colloidal nanoparticles onto solid substrates. This is an experimental regime that is extremely far from thermodynamic equilibrium, due to the rapidity with which the solvent evaporates. It is the dynamics of flow and evaporation that lead to the formation of the complex structures that are observed by atomic force microscopy (AFM). The mechanisms involved in the formation of these patterns are not yet fully understood, largely because it is somewhat challenging to directly observe the evaporation dynamics during spin-casting. Monte Carlo simulations based on a modified version of the model of Rabani et al. [1] have allowed the study of the processes that lead to the production of particular nanoparticle morphologies. Morphological image analysis (MIA) techniques are applied to compare simulated and experimental structures, revealing a high degree of correspondence. Furthermore, these tools provide an insight into the level of order in these systems, and improve understanding of how a pattern’s specific morphology arises from its formation mechanisms. Modifying the properties of a substrate on the scale of a few hundred nanometres by AFM lithography has a profound effect on the processes of nanoparticle pattern formation. The simulation model of Rabani et al. was successfully modified to account for the effect of surface modification. The simulations were further modified to reproduce cellular structures on two distinct length scales– a phenomenon that is commonly seen in experiments. The dynamic behaviour of simulated nanoparticle structures is examined in the “scaling” regime in relation to recent experiments carried out by Blunt et al. [2] in an attempt to understand the coarsening mechanism. Finally, a genetic algorithm approach is applied to evolve the simulations to a target morphology. In this way, an experimental target image can be automatically analysed with MIA techniques and compared with an evolving population of simulations until a target “fitness” is reached.
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Wang, Haolan. "Nanoparticle formation through the liquid arc method." Thesis, University of Cambridge, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.613366.

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Haubold, Danny, Annett Reichhelm, Alexander Weiz, Lars Borchardt, Christoph Ziegler, Lydia Bahrig, Stefan Kaskel, Michael Ruck, and Alexander Eychmüller. "The Formation and Morphology of Nanoparticle Supracrystals." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-209752.

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Supracrystals are highly symmetrical ordered superstructures built up from nanoparticles via self-assembly. While the NP assembly has been intensively investigated, the formation mechanism is still not understood. To shed some light onto the formation mechanism, we are using one of the most common supracrystal morphologies, the trigonal structures, as a model system to investigate the formation process in solution. To explain the formation of the trigonal structures and determining the size of the supracrystal seeds formed in solution, we introduce the concept of substrate-affected growth. Furthermore, we show the influence of the NP concentration on the seed size and extend our investigations from Ag towards Au. 1.
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Vanella, Andrea. "Nanoparticle formation in nanoporous structures and applications." Doctoral thesis, Università di Siena, 2022. http://hdl.handle.net/11365/1210313.

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In the recent years the scientific community demonstrates an increasing interest in the study of nanoparticles and their properties, such as interaction with a surface and the adsorption/desorption characteristic. The latte properties, as well the formation and growth of nanoparticles, can be controlled by a proper light source. On the other hand having a much larger specific surface to increase the adsorbed amount of atoms, is a desirable characteristic of the system. That is on of the reason of the large exploitation of nanoporous material in many different research fields. Porous glass presents a wide variety of benefits: thermal and chemical stability, low production cost, easiness of handling and large value of specific surface area, which can be of the order tens square meters per grams. This thesis work falls into the context described above, in particular it aims to investigate the adsorption/desorption process of alkali atoms onto different randomly oriented pores structures, as well the formation of aggregates in the pores of the adsorbed atoms by using different external light sources. The control of the desorption process as well as the formation and the desorption of nanoparticles make use of two light induced process: Light Induced Atomic Desorption or LIAD and the Surface Plasmon Induced Desorption. The main difference between these two effects, beside the physics behind the two effects is intrinsically different, is that for the latter is required a resonant light source resonant with the plasmonic oscillation while for the LIAD it is not needed any resonant wavelength. The main and newer part of the work is done in a chamber were is present an Ultra High Vacuum regime. Most of the studies on this topic were performed in vapor filled cells. The use of an Ultra High Vacuum regime for this work is done to overcome some drawback of the vapor cells, such as the impossibility to change atomic species once that a cell is built or the difficult controlling of the atomic density. Indeed in this apparatus the loading process is done with an externally removable dispenser controlled by a current flowing into it. Hence the loading process is no more continuous an can be switched off by switching off the flowing current. Once the UHV regime is reached, the first step is the loading of the porous sample. Then the adsorption properties at different wavelengths are studied as well as that eventual desorption of the atomic specimen. The formation of nanoparticles in the porous structures are induced by an external light source under different condition of intensity and illumination time. Similar studies are also performed in alkali vapor filled cells, in order to compare the results. There were performed simultaneously measurements by on the optical signal and electric signal by means of a channeltron. The measurements performed in this work showed that by using porous glass, with different average pores size and under an appropriate illumination, it is possible to exploit the LIAD effect to enhance the aggregation of Rb nanoparticles in UHV regime. The most satisfying sample revealed to be a film of nanoporous alumina of 300 nm thickness.
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Voloshko, Andrey. "Nanoparticle formation by means of spark discharge at atmospheric pressure." Thesis, Saint-Etienne, 2015. http://www.theses.fr/2015STET4011/document.

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Au cours de la dernière décennie, les nanoparticules métalliques ont trouvé de nombreuses applications dans divers domaines tels que l'optique, la photonique, la catalyse, la fabrication de matériaux, les énergies renouvelables, l'électronique, la médecine et même les cosmétiques. Les nouveaux développements de ces applications nécessitent des méthodes de synthèse de nanoparticules fiables donnant une grande quantité de nanoparticules aux propriétés spécifiques. Les méthodes à base de plasma, tels que des décharges d'étincelles et d’arcs sont parmi les plus prometteuses car elles permettent une augmentation considérable de la vitesse de production et une diminution des coûts. Le contrôle de ces processus est cependant toujours difficile et nécessite de nombreuses études détaillées, à la fois expérimentales et théoriques. Dans cette thèse, les décharges d'étincelles sont étudiées numériquement. L'objectif principal est de mieux comprendre les principaux mécanismes impliqués dans la décharge d'étincelle avec un faible écartement d’électrodes et sous pression atmosphérique. Ensuite, sur la base de la modélisation détaillée proposée, la quantité de nanoparticules produites ainsi que leur distribution en taille est prédite et est comparée avec les résultats expérimentaux correspondants. Dans le modèle proposé, seules les conditions initiales, la géométrie du système et les propriétés du matériau sont utilisés comme paramètres d'entrée. Une décharge d’étincelle unique est divisée en plusieurs unités selon les échelles spatiales et temporelles des processus physiques comme suit: modèles de (i) flux plasma, (ii) décharge, (iii) hydrodynamique, (iv) couche cathodique, (v) érosion d’électrode et (vi) formation de nanoparticules. Les résultats du modèle combiné sont ensuite comparés à la fois avec d'autres résultats théoriques et à des résultats expérimentaux. Enfin, les possibilités d'optimisation de la production de nanoparticules par décharge d'étincelles sont proposées sur la base de la variation des paramètres expérimentaux et sur l'analyse de la quantité de particules produites et de leur taille moyenne
During last decade, metal nanoparticles have found many applications in various areas, such as optics, photonics, catalysis, material manufacturing, renewable energy, electronics, medicine and even cosmetics. Further development of these applications requires reliable nanoparticle synthesis methods providing a large amount of nanoparticle with required properties. Plasma-based methods, such as spark and arc discharges are among the most promising since they allow a considerable increase in the production rate and a decrease in costs. The control over these processes is, however, still challenging and requires many detailed studies, both experimental and theoretical. In this thesis, spark discharge is investigated numerically. The main objective is to better understand main mechanisms involved in spark discharge with a short gap under atmospheric pressure. Then, based on the proposed detailed modeling, the amount of the produced nanoparticles, their size distribution should be predicted and compared with the corresponding experimental results. In the proposed model, only initial conditions, geometry of the system and material properties are used as input parameters. A single spark event is divided into several units according to localization and time scales of physical processes as follows: (i) streamer model, (ii) discharging model, (iii) hydrodynamic model, (iv) cathode layer model, (v) electrode erosion model and (vi) nanoparticle formation model. The results of the combined model are then compared both with other theoretical and experimental results. Finally, possibilities of optimization the nanoparticle production by spark discharge are proposed based on the variation of the experimental parameters and on the analysis of the resulted particle yield and mean size
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Huo, Zhijie. "Modelling of Soot Nanoparticle Formation in Turbulent Flames." Thesis, The University of Sydney, 2020. https://hdl.handle.net/2123/24858.

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Soot emission from hydrocarbon fuel combustion is a major source of particulate pollution. The increasingly stringent regulations on emissions have necessitated the developments of soot models to aid designs of combustion devices with cleaner performance. Such models will also make valuable contributions in designing and optimising processes that produce beneficial carbonaceous particulates, e.g. carbon black plants and processes requiring enhanced soot-induced radiation. The present work aims to develop a detailed soot model and implements the model in the sparse multiple mapping conditioning (MMC) - large eddy simulation (LES) framework to form a predictive tool for soot evolution in turbulent flames. The thesis consists of two major parts presenting soot evolution without and with turbulence, respectively. In the first part, the fundamental physics of soot evolution processes is presented, followed by a review of soot formation modelling that focuses on the sectional methods. The current work uses a sectional soot kinetics scheme that approximates solutions to the population balanced equations by lumped species and replaces individual growth/oxidation models by a sequence of equivalent physicochemical reactions with Arrhenius-like rate expression. The soot kinetics is a reduced version derived from a multisectional soot mechanism (Sirignano et al., Energy & Fuels 27, 2013). In this work, a novel generalised model describing the interaction potential well depth between soot particles of any size and composition is proposed for a thermal rebound based coagulation model to account for the probability of combining electrically neutral entities, i.e. nucleation, condensation and coagulation. The coagulation model is then simplified into Arrhenius expression so that the gas and soot kinetics can be integrated into a fully coupled system. The model is tested by comparisons to the experimental data of a series of ethylene burner stabilised stagnation (BSS) premixed flames and a methane laminar coflow diffusion flame, and the sensitivity to model parameters is investigated. Overall, the simulation results show good agreement with the experimental measurement, but strong sensitivity to the parameter λ that accounts for void fractions of soot particles is observed. In the second part, the turbulence and combustion models are reviewed. The focus is placed on the LES and MMC methods and the closure strategies in the methods. As the source terms of a lumped species reflecting different evolution processes are represented by a chemical source term in the sectional soot kinetics model, the filtered transport equation of lumped species can be straightforwardly closed by a joint filtered density function (FDF) of gas-phase species and lumped species. This work employs the sparse generalised MMC-LES, a stochastic FDF type method but uses much fewer notional particles (usually fewer than the number of LES cells) than the traditional FDF method. Combined with the code developments with some emphasis on computational load balancing models, the coupled turbulence-chemistry-soot model is shown to provide detailed soot evolution solutions, such as particle size distribution (PSD), with reasonable computational costs. The model is examined by comparison to the experimental data of the Delft Adelaide flame. Although discrepancies exist, the numerical predictions on soot volume fraction and intermittency are in reasonable accuracy. Detailed investigations on the probability density functions of the soot volume fraction show that the model captures the key features of soot formation but predicts significantly more soot in the range between 0.1 ppb and 6.4 ppb than the experimental measurements. Lastly, the predicted soot PSDs are presented. The results suggest that the PSDs in the turbulent flame simulation are in mixed unimodal and bimodal distributions.
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Tobler, Dominique Jeanette. "Molecular pathways of silica nanoparticle formation and biosilicification." Thesis, University of Leeds, 2008. http://etheses.whiterose.ac.uk/359/.

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Biosilicification and silica nanoparticle formation occur in many modem terrestrial environments and they also played an important role in ancient geological settings. This thesis presents results from (i) field studies in Icelandic geothermal waters that aimed at quantifying the parameters that control the growth rate and texture of sinters and the diversity and silicification of associated microbial communities and (ii) lab studies that focussed on the kinetics and mechanisms of silica nanoparticle forination under conditions mimicking natural geothermal environments. The analysis of growth rates and textures of sinters from five geochemically very different Icelandic geothermal areas showed that the inorganic silica precipitation rate was strongly influenced by temperature, pH, ionic strength, and silica concentration. In addition, the presence of thick biofilms seemed to have aided the precipitation process by simply providing "sticky" surfaces. In turn, the structural and textural development of sinters was affected by the precipitation rate and mechanism (subaqueously and/or subaerially) as well as the presence and absence of microbial communities. As a result, porous, subaequeouss inters developed at sites with medium to high sinter growth rates and low microbial activity. Conversely, dense, heterogeneouss inters formed in geothermal waters characterized by low precipitation rates and extensive biofilms. With time these biofilms became fully silicified and well preserved within the sinter edifices. The diversity of microbial communities in hot spring environments appeared to be directly controlled by the physico-chernical conditions of the geothermal waters (i. e., T,pH, salinity and sinter growth rate) and the most dominant phylotypes were related to Aquificae, Deinococci and y-Proteobacteria. The rates and mechanisms of the initial steps of silica polymerisation and silica nanoparticle formation were quantified in-situ and time-resolved using synchrotron-based small angle x-ray scattering (SAXS). The experiments were carried out in near neutral pH solutions with initial Si02 between 640 - 1600 ppm, ionic strength of 0.02 - 0.22 M, and added organics (glucose, glutarnic acid, xanthan gum). The polymerization reactions were induced either by neutralising a high pH solution or by rapid cooling of a supersaturatedh ot silica solution. From the analysis of the time-resolved SAXS data, a kinetic model for the nucleation and growth of silica nanoparticles was derived suggesting a 3-stage process: (1) homogeneous nucleation of critical nuclei (I -2 run; depending on the concentration regimes), (2) 3-dimensional, surface-controlled particle growth following 1st order reaction kinetics and (3) Ostwald ripening and particle aggregation. At the end of this 3-stage process, regardless of the tested silica concentration, ionic strength or added organics, the final particle diameter was about 8nm characterised by open, polymeric (i. e., mass fractal) structures. The kinetics of particle growth were unaffected by the two different methods to induce silica polymerisation (pH-drop vs. T-drop) however, the growth processes proceeded substantially slower if silica polymerisation was induced by fast cooling as opposed to pH-drop. In contrast, the addition of organics did not affect the reaction rates. The nucleation and growth of silica nanoparticles under constant re-supply Of fresh silica solution (i. e., hot springs) was simulated using a flow-through geothermal simulator system. The effect of silica concentration ([Si02D, ionic strength (IS), temperature and organic additives on the size and polydispersity of silica nanoparticles was quantified. VVhile the applied increase in IS did not affect the size (30 - 35 nm) and polydispersity (± 9 nm) observed at 58 C, an increase in [Si02] notably enhanced silica polymerisation and also resulted in slightly smaller particle sizes. The biggest effect was observed with a decrease in temperature (58 to 33 C) or the addition of glucose: in both cases particle growth was restricted to sizes below 20 mn. Conversely, the addition of xanthan gum induced the development of a thin silica-rich film that enhanced silica aggregation.
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Lin, Jiashu. "La formation et le transport des particules dans le plasma froid." Thesis, Orléans, 2020. http://www.theses.fr/2020ORLE3029.

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Les plasma poudreux sont des plasmas qui contiennent des particules solides dont les tailles vont quelques nanomètres à quelques dizaines de micromètres. La présence de ces particules solides, dans les plasmas, a été découverte dans les procédés de l'industrie de microélectronique. Les particules dans le plasma étaint considérées comme la source principale de la contamination de ces procédés. Les premiers travaux de recherche était focalisées sur les méthodes et moyens de les éliminer et d'empêcher leur formation. Suite à l'identification des différentes phase de formation et la découverte de la structure cristalline des nanoparticules qui se forment dans la première phase des applications très prometteuses ont commencé à se développer dans différents domaines tels que le photovoltaïque, la nanoélectronique etc., Ceci a donné une nouvelle impulsion aux activités de recherches sur les propriétés du plasma poudreux ont attiré l'attention de plus en plus de chercheurs à travers le monde.Les plasmas poudreux sont des plasmas qui contiennent des particules solides dont les tailles vont de quelques nanomètres à quelques dizaines de micromètres. La présence de ces particules solides, dans les plasmas, a été découverte dans les procédés de l'industrie de microélectronique. Les particules dans le plasma étaient considérées comme la source principale de la contamination de ces procédés. Les premiers travaux de recherche étaient focalisées sur les méthodes et moyens deles éliminer et d’empêcher leur formation. Suite à l’identification des différentes phases de formation et la découverte de la structure cristalline des nanoparticules qui se forment dans la première phase des applications très prometteuses ont commencé à se développer dans différents domaines tels que le photovoltaïque la nanoélectronique etc…, Ceci a donné une nouvelle impulsion aux activités de recherches sur les propriétés du plasma poudreux et ont attiré l’attention de plus en plus de chercheurs à travers le monde.Les travaux de recherche, entrant dans le cadre de cette thèse, sur les plasmas poudreux, ont été focalisés essentiellement sur le contrôle de la formation des particules solides et leur transport dans le plasma. Par conséquent, cette thèse est composée par deux parties, la première concerne la formation des particules en phase gazeuse dans le plasma et la deuxième traitera du comportement et du transport du nuage dense de particules dans le plasma. Ces travaux ont été effectués au sein du laboratoire GRMI (Université d’Orléans, France) et du Département d’électronique du Kyoto Institute of technology (Japon), respectivement, dans le cadre d’une co-tutelle.Les travaux sur la formation des particules a été réalisée dans un plasma RF généré dans un mélange gazeux composé d’Argon (Ar, 98%) et d’Acétylène (C2H2, 2%). Le processus de formation des particules s’effectue en trois étapes: la nucléation (phase chimique), l'agglomération, et la croissance par dépôt radicalaire sur la surface des particules. Nous sommes intéressés à l'étape de nucléation. L'influence de la puissance, la pression et la température des gaz sur le temps de nucléation est étudiée. L'évolution temporelle de la tension d'auto polarisation de la décharge est utilisée comme un indice pour détecter la fin de l'étape de nucléation. Les résultats montrent que le temps de nucléation augment avec l'augmentation de la température mais diminue avec celle de la puissance et de la pression. Cela dit, plus la température est basse, la puissance et la pression sont élevées, plus la phase de nucléation est rapide. La dépendance de la nucléation de la température est expliquée par le mécanisme de la relaxation de l’excitation translationnelle-vibrationnelle des molécules du gaz précurseur. En effet l’énergie d’excitation vibrationnelle joue le rôle d’énergie d’activation pour les réactions chimiques ayant lieu lors de cette phase. Par contre, celles sur la puissance et la pression, elles sont expliqué
This thesis studies the dust particles in plasmas. It consists of two parts. The first part is the formation of dust particles, that is to study how the dust particles are generated from the reactive gas in the plasmas. The second part is the transport behaviour of dust particles, that is to study how the dust particles act in the plasmas.In the part of the formation of dust particles, carbon dust particles are generated in the plasmas. It is known that the formation process of dust particles in plasmas can be determined by 3 steps: nucleation, agglomeration and surface grow. The nucleation step is focused. The results of experiments show that the nucleation process occurs faster in higher power, higher pressure and lower temperature. The dependency of the nucleation time on the temperature is explained by the vibration-transition energy relaxation mechanism, and that on the RF power and pressure is explained by the ratio of the charge and diffusion time of the small dust particles.In the part of the transport behaviours of dust particles, industrially fabricated particles with determined size are injected into Ar plasmas. The particles in the plasmas are observed by laser scattering with a CCD camera. The diagnostics of plasma are performed by a double langmuir probe. Pulse-time modulation to the Ar RF plasmas is studied to be a factor to influence and to control the transport of dust particles. Particles of mono-dispersed size are firstly studied in the plasmas. It is shown that the levitating positions and falling down processes can be controlled by the RF power and pulse-time modulation. Secondly, two sizes particles are injected into the plasma at same time. The different transport behaviours, as like the segmentation of levitation and different timing of falling down basis on their size, are observed. Particles of mixture sizes can be separated one size particles from other sizes. The mechanisms of transport behaviours of the dust particles are investigated by the combination of the diagnostic of plasma parameters (electron temperature and ion density in principle) by the double langmuir probe and calculation of the forces acting on the dust particles. Calculation methods adjusting to the specific experiment setup are established. The calculation results have a good agreement with that of the experiments
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Marichal, Laurent. "Interactions protéines-nanoparticules : émergence de nouveaux facteurs déterminant la formation de la couronne de protéines." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLS100/document.

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Les nanoparticules sont de plus en plus présentes dans notre quotidien et leur présence dans les organismes vivants est aujourd’hui avérée. Aussi, dans un milieu biologique, des protéines recouvrent spontanément la surface des nanoparticules pour former une couronne de protéines. Suivant la composition de cette couronne, une nanoparticule acquiert une "identité biologique" spécifique qui peut conditionner sa biodistribution ainsi que son éventuelle toxicité.De nombreuses zones d’ombre persistent quant à la connaissance des mécanismes d’adsorption des protéines sur les nanoparticules. Deux caractéristiques physico-chimiques, peu abordées jusqu’à maintenant, ont été étudiées ici : la taille des protéines et la présence de modification post-traductionnelles. Aussi, du fait de leur forte utilisation, nous nous sommes concentrés sur les nanoparticules de silice (SiNPs).L’adsorption d’hémoprotéines, de nature similaire mais de tailles différentes, sur des SiNPs, elles-mêmes de tailles différentes, a été étudiée. Les isothermes d’adsorption et les titrations calorimétriques ont notamment montré qu’il existe une relation entre la taille des protéines et leur affinité pour une surface de silice. Des différences plus fines ont aussi pu être observées selon la taille des nanoparticules. Une analyse structurale des protéines adsorbées a également été effectuée par dichroïsme circulaire et diffusion de neutrons aux petits angles. Les hémoprotéines apparaissent comme des protéines très structurées qui sont peu affectées par l’adsorption. Cependant, bien que la structure quaternaire soit conservée, des modifications structurales sont observables.Des études faites en présence de mélanges de protéines (extraits de protéines de levure) ainsi que de peptides de synthèse ont également montré le rôle important de la diméthylation asymétrique de l’arginine sur l’interaction protéines/SiNPs. L’utilisation d’un panel de techniques expérimentales et de simulations a permis de comprendre le mécanisme responsable de la forte affinité de peptides contenant cette méthylation particulière. De façon plus générale, nos travaux suggèrent que les modifications post-traductionnelles peuvent influencer notablement les interactions de biomolécules avec des surfaces minérales
Nanoparticles are ubiquitous in our environment and their presence inside our bodies is now established. Besides, in a biological medium, nanoparticles are spontaneously covered by proteins that form the so-called protein corona. Depending on the corona composition, a nanoparticle will possess a specific "biological identity" conditioning its biodistribution as well as its potential toxicity.Despite being highly studied, many aspects of the protein adsorption mechanisms remain unknown. Here we particularly focused on the influence of two physicochemical characteristics, which had rarely been addressed: protein size and post-translational modifications. Also, because of their intensive use, we worked on silica nanoparticles (SiNPs).We studied the adsorption of hemoproteins on SiNPs, both of them having different sizes. Adsorption isotherms and calorimetry studies showed a relationship between the protein size and its affinity towards silica surfaces. Finer differences could also be observed by varying the SiNPs size. Additionally, structural analyses of adsorbed proteins were performed using circular dichroism and small-angle neutron scattering. The adsorption of hemoproteins, which are well-structured proteins, seems to have little effects on their structure. However, even though the quaternary structure is maintained, structural modifications can be seen.Using yeast protein extracts and synthetic peptides, the major role of arginine asymmetric dimethylation on proteins/SiNPs interaction could be established. The use of experimental and simulation techniques allowed us to understand the mechanism responsible for the high affinity of peptides having this peculiar methylation. As a whole, this work suggests that post-translational modifications can influence considerably the interactions between biomolecules and mineral surfaces
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Books on the topic "Nanoparticle formation"

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Nicola, Pinna, ed. Metal oxide nanoparticles in organic solvents: Synthesis, formation, assembly and application. Heidelberg: Springer, 2009.

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Markus, Winterer, Schmechel Roland, Schulz Christof, and SpringerLink (Online service), eds. Nanoparticles from the Gasphase: Formation, Structure, Properties. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012.

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Nechaev, Vladimir, Andrey Shuba, Stanislav Gridnev, and Vitaliy Topolov. Dimensional effects in phase transitions and physical properties of ferroics. ru: INFRA-M Academic Publishing LLC., 2022. http://dx.doi.org/10.12737/1898400.

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The monograph presents mathematical methods and a set of mathematical models describing, within the framework of phenomenological theory, phase transitions in 0D-. 1D-, 2D-, 3D-dimensional ferroelectrics, ferroelastics, ferromagnets and their static and dynamic physical properties near the phase transition point. The influence of the parameters characterizing the ferroic sample and its interaction with the environment on the features of the phase transition, phase transition temperature shift, heat capacity, generalized susceptibilities is analyzed. Mathematical models of multilayer thin-film structures and composite materials, where one of the components is a ferroic nanoparticle, are considered. In general, modern ideas about dimensional effects in ferroelectrics, ferroelastics, ferromagnets and mechanisms of purposeful influence on their properties are sufficiently fully covered. It is intended for researchers, students and postgraduates of physical specialties of universities interested in fundamental problems of formation of physical properties of low-dimensional materials. Research engineers, developers of new materials can use the presented material as a scientific and methodological basis to support the development of optimal solutions for their creation.
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Klinkova, Anna. Nanochemistry: Chemistry of Nanoparticle Formation and Interactions. Elsevier, 2023.

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Klinkova, Anna. Nanochemistry: Chemistry of Nanoparticle Formation and Interactions. Elsevier, 2023.

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Blunt, MO, A. Stannard, E. Pauliac-Vaujour, CP Martin, Ioan Vancea, Milovan Suvakov, Uwe Thiele, Bosiljka Tadic, and P. Moriarty. Patterns and pathways in nanoparticle self-organization. Edited by A. V. Narlikar and Y. Y. Fu. Oxford University Press, 2017. http://dx.doi.org/10.1093/oxfordhb/9780199533046.013.8.

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This article reviews relatively recent forms of self-assembly and self-organization that have demonstrated particular potential for the assembly of nanostructured matter, namely biorecognition and solvent-mediated dynamics. It first considers the key features of self-assembled and self-organized nanoparticle arrays, focusing on the self-assembly of nanoparticle superlattices, the use of biorecognition for nanoparticle assembly, and self-organizing nanoparticles. It then describes the mechanisms and pathways for charge transport in nanoparticle assemblies, with particular emphasis on the relationship between the current–voltage characteristics and the topology of the lattice. It also discusses single-electron conduction in nanoparticle films as well as pattern formation and self-organization in dewetting nanofluids.
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Winterer, Markus, Axel Lorke, Roland Schmechel, and Christof Schulz. Nanoparticles from the Gasphase: Formation, Structure, Properties. Springer, 2014.

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Winterer, Markus, Axel Lorke, and Roland Schmechel. Nanoparticles from the Gasphase: Formation, Structure, Properties. Springer, 2012.

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Niederberger, Markus, and Nicola Pinna. Metal Oxide Nanoparticles in Organic Solvents: Synthesis, Formation, Assembly and Application. Springer London, Limited, 2009.

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Springer, Markus Niederberger, and Nicola Pinna. Metal Oxide Nanoparticles in Organic Solvents: Synthesis, Formation, Assembly and Application. Springer, 2012.

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Book chapters on the topic "Nanoparticle formation"

1

Pierre, Alain C. "Nanoparticle Formation." In Introduction to Sol-Gel Processing, 165–208. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-38144-8_5.

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Yang, Yuehai, and Wenzhi Li. "Gas-Phase Nanoparticle Formation." In Encyclopedia of Nanotechnology, 1303–8. Dordrecht: Springer Netherlands, 2016. http://dx.doi.org/10.1007/978-94-017-9780-1_358.

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Yang, Yuehai, Wenzhi Li, Elmar Kroner, Eduard Arzt, Bharat Bhushan, Laila Benameur, Liu Wei, et al. "Gas Phase Nanoparticle Formation." In Encyclopedia of Nanotechnology, 929–34. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-90-481-9751-4_358.

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Zolotko, Andrey N., Nikolay I. Poletaev, Jacob I. Vovchuk, and Aleksandr V. Florko. "Nanoparticle Formation by Combustion Techniques." In Gas Phase Nanoparticle Synthesis, 123–56. Dordrecht: Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-1-4020-2444-3_5.

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Patel, Pal, and Ashutosh Kumar. "CHAPTER 3. Factors Affecting a Nanoparticle's Protein Corona Formation." In Nanoparticle–Protein Corona, 61–79. Cambridge: Royal Society of Chemistry, 2019. http://dx.doi.org/10.1039/9781788016308-00061.

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Baweja, Lokesh. "CHAPTER 7. Computer Simulations for Understanding Nanoparticle-biomolecule Corona Formation." In Nanoparticle–Protein Corona, 191–203. Cambridge: Royal Society of Chemistry, 2019. http://dx.doi.org/10.1039/9781788016308-00191.

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Vakhrushev, Alexander V. "Numerical Simulation of Nanoparticle Formation." In Computational Multiscale Modeling of Multiphase Nanosystems, 125–86. Toronto ; New Jersey : Apple Academic Press, 2017. | Series: Innovations in chemical physics and mesoscopy: Apple Academic Press, 2017. http://dx.doi.org/10.1201/9781315207445-3.

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Altman, Igor S., Peter V. Pikhitsa, and Mansoo Choi. "Key Effects in Nanoparticle Formation by Combustion Techniques." In Gas Phase Nanoparticle Synthesis, 43–67. Dordrecht: Springer Netherlands, 2004. http://dx.doi.org/10.1007/978-1-4020-2444-3_3.

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Boulmer-Leborgne, Chantal, Ratiba Benzerga, and Jacques Perrière. "Nanoparticle Formation by Femtosecond Laser Ablation." In Laser-Surface Interactions for New Materials Production, 125–40. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-03307-0_6.

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Wong, Tin Wui, and Philipp John. "Advances in Spray Drying Technology for Nanoparticle Formation." In Handbook of Nanoparticles, 329–46. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-15338-4_18.

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Conference papers on the topic "Nanoparticle formation"

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Heszler, Peter, and Lars Landstrom. "Laser-induced nanoparticle formation." In Microtechnologies for the New Millennium 2003, edited by Robert Vajtai, Xavier Aymerich, Laszlo B. Kish, and Angel Rubio. SPIE, 2003. http://dx.doi.org/10.1117/12.498569.

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Wang, Xinwei, and Xianfan Xu. "The Formation Process of Nanoparticles in Laser Materials Interaction." In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-33857.

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Nanoparticles formed in short pulsed laser materials interaction have strong effects on laser micro-machining, material surface processing, and thin film deposition. In this work, Molecular Dynamics (MD) simulations are conducted to attain physical origins and the nature of nanoparticle formation in picosecond laser materials interaction. The MD simulation reveals that nanoparticles originate from an intense vapor phase explosion process occurring after laser heating. This phase explosion is driven by an accumulated high pressure of the order of 30 MPa in the near surface region. It is observed that nanoparticles start coming out after laser heating as a result of the after-heating intense phase explosion. Also observed is that the pressure in nanoparticles undergoes a reduction because of the temperature decrease and atom re-construction in space. In addition, saturation of the nanoparticle yield is observed when the laser fluence reaches a certain level, which is a result of limited heat penetration depth during laser heating.
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Compton, J. M., S. K. Cotts, D. E. Kranbuehl, E. Espuche, L. David, Alberto D’Amore, Domenico Acierno, and Luigi Grassia. "Metal Nanoparticle formation in PEI." In IV INTERNATIONAL CONFERENCE TIMES OF POLYMERS (TOP) AND COMPOSITES. AIP, 2008. http://dx.doi.org/10.1063/1.2988971.

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Keramati, Hadi, Mohammad Zabetian, Mohammad Hassan Saidi, and Ali Asghar Mozafari. "Experimental Characterization of Stabilized Suspensions Caused by Formation of Nanoparticle Halos." In ASME 2014 12th International Conference on Nanochannels, Microchannels, and Minichannels collocated with the ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/icnmm2014-21748.

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Suspension flow has an important role in various applications such as paint, material and pharmaceutical industries. Settling is considered as a resisting phenomenon in the processes dealing with suspensions. Using nanoparticles as an additive to micro-particulates has been studied in limited studies. This work presents an experimental investigation to assess the effectiveness of nanoparticles in reduction of suspension settling. Microscopic imaging and transmission measurement were used to analyze the stability factors in a container. Transmission analysis revealed that presence of nanoparticles in the suspension, decreased the sedimentation rate. Microscopy showed that the settling rate decreased after adding nanoparticles. This is attributed to the repulsive forces between microparticles caused by the halos of nanoparticle. Highly charged nanoparticles segregate to region near negligibly charged microspheres because of their repulsive Coulombic interactions. Therefore, microparticles exhibit an effective charge in presence of nanoparticles. Obtained results indicate that the nanoparticles with appropriate volume fraction can stabilize suspension of microparticles and can successfully minimize the settling rate. Proposed technique can be also implemented in other applications such as heat pipes and heat transfer devices.
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Sasaki, Sousuke, Yoshio Tonegawa, and Toru Nakajima. "Potential of Nanoparticle Formation by Vehicles." In SAE 2006 World Congress & Exhibition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2006. http://dx.doi.org/10.4271/2006-01-0622.

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Matar, Omar K. "Pattern Formation in Evaporating Drops With and Without Nanoparticles." In ASME 2011 9th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2011. http://dx.doi.org/10.1115/icnmm2011-58292.

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We show how asymptotic reduction techniques are used to model the motion of sessile droplets in the presence of heat transfer, evaporation and nanoparticles. When nanoparticles are present in the drop, lubrication theory is used to model the contact line dynamics and the evolution of the nanoparticle concentration. The model accounts for the effects of surface tension, Marangoni stresses, evaporation and intermolecular forces; the effect of nanoparticles on the latter endows the film with structural disjoining pressure forces near the contact line. Our numerical simulations catalogue the different types of possible contact line dynamics, which range from spreading and retraction, to pinning and ‘terracing’; the latter phenomenon is caused by the effect of nanoparticles on the intermolecular forces.
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Steinbrück, Andrea, Andrea Csaki, Kathrin Ritter, Martin Leich, J. Michael Köhler, Wolfgang Fritzsche, Wolfgang Fritzsche, and Frank Bier. "Formation Of Defined Nanoparticle Constructs Containing Gold, Silver, And Gold-Silver Nanoparticles." In DNA-BASED NANODEVICES: International Symposium on DNA-Based Nanodevices. AIP, 2008. http://dx.doi.org/10.1063/1.3012290.

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Adleman, James R., Helge Eggert, Karsten Buse, and Demetri Psaltis. "Holographic grating formation in silver nanoparticle suspensions." In 2006 Conference on Lasers and Electro-Optics and 2006 Quantum Electronics and Laser Science Conference. IEEE, 2006. http://dx.doi.org/10.1109/cleo.2006.4627575.

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Yang, Y. C., C. H. Wang, T. Y. Yang, Y. Hwu, C. H. Chen, J. H. Je, and G. Margaritondo. "Synchrotron X-Ray Induced Gold Nanoparticle Formation." In SYNCHROTRON RADIATION INSTRUMENTATION: Ninth International Conference on Synchrotron Radiation Instrumentation. AIP, 2007. http://dx.doi.org/10.1063/1.2436333.

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Zhu, Youyi, Peng Yu, and Jian Fan. "Study on Nanoparticle Stabilized Emulsions for Chemical Flooding Enhanced Oil Recovery." In International Petroleum Technology Conference. IPTC, 2021. http://dx.doi.org/10.2523/iptc-21456-ms.

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Abstract Chemical flooding is one of enhanced oil recovery (EOR) methods. The primary mechanism of EOR of chemical flooding is interfacial tension reduction, mobility ratio improvement and wettability changes. Recent studies showed that enhancing emulsification performance was beneficial to improve oil displacement efficiency. The formation of Pickering emulsion by nanoparticles could greatly improve the emulsifying performance. Using nanoparticles stabilized emulsions for chemical EOR application is a novel method. In this study, six different types of nanoparticles were selected, including hydrophilic nano silica, modified nano silica, carbon nanotubes and bentonite, etc. The nanoparticle combine with petroleum sulfonate could form a stable emulsion. Particle wettability were measured by using contact angle measurement (OCA20). Emulsifying intensity index was measured for different nanoparticle-stabilized emulsions. The mechanisms of nanoparticle-stabilized emulsions and relationship between emulsion stability have been investigated. The influence of dispersant on nanoparticle-stabilized emulsions also has been investigated. Nanoparticles mainly play a role in improving the stability of emulsions while surfactant play a major role in enhancing the emulsifying dispersion. The wettability of solid particles was one of the most important factors that affects the stability of emulsions. Partial hydrophobic nanoparticles were much easier to form stable emulsions than hydrophilic nanoparticles. Nanoparticles could form a three-dimensional network structure, thereby the stability of the emulsion was improved. Use of surfactant to disperse nanoparticles could further improve the emulsion stability. Finally, three nanoparticles stabilized emulsion formulations were developed for chemical flooding EOR. Nanoparticle-stabilized emulsions could improve oil displacement efficiency in chemical combination flooding. This research was used to optimize chemical combination flooding formulation and has a guidance function for application of nanoparticles in chemical flooding EOR.
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Reports on the topic "Nanoparticle formation"

1

Cheng, M. D. Physico-Chemical Dynamics of Nanoparticle Formation during Laser Decontamination. Office of Scientific and Technical Information (OSTI), June 2005. http://dx.doi.org/10.2172/893273.

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Cheng, M. D. Physico-Chemical Dynamics of Nanoparticle Formation during Laser Decontamination. Office of Scientific and Technical Information (OSTI), June 2004. http://dx.doi.org/10.2172/839150.

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Cheng, Meng-Dawn. PHYSICO-CHEMICAL DYNAMICS OF NANOPARTICLE FORMATION DURING LASER DECONTAMINATION AND CHARACTERIZATION. Office of Scientific and Technical Information (OSTI), June 2002. http://dx.doi.org/10.2172/835402.

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Cheng, Meng-Dawn. PHYSICO-CHEMICAL DYNAMICS OF NANOPARTICLE FORMATION DURING LASER DECONTAMINATION AND CHARACTERIZATION. Office of Scientific and Technical Information (OSTI), June 2003. http://dx.doi.org/10.2172/835403.

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Seferis, James C. Nanoparticle Control of Void Formation and Expansion in Polymeric and Composite Systems. Fort Belvoir, VA: Defense Technical Information Center, February 2007. http://dx.doi.org/10.21236/ada464995.

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Xi, Yunping, Tom Dewers, Mija Hubler, Pania Newell, Jiri Nemecek, Linfei Li, Yige Zhang, Shahlaa Al Wakeel, David Culp, and Bang He. Nanoparticle Injection Technology for Remediating Leaks of CO₂ Storage Formation (Final Technical Report). Office of Scientific and Technical Information (OSTI), December 2019. http://dx.doi.org/10.2172/1631533.

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Thomson, T. Silicide formation and particle size growth in high temperature annealed, self-assembled FePt nanoparticle arrays. Office of Scientific and Technical Information (OSTI), October 2003. http://dx.doi.org/10.2172/826528.

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Hiatt, Colin. Elemental Bismuth Nanoparticles: Mechanistic Studies Concerning Reduction of a Bi(III) Precursor Leading to Nanoparticle Formation in a Bottom-Up, High Payload Synthetic Approach. Portland State University Library, January 2014. http://dx.doi.org/10.15760/honors.112.

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Fernando A. Escobedo. Final Report: Grant DE-FG02-05ER15682. Simulation of Complex Microphase Formation in Pure and Nanoparticle-filled Diblock Copolymers. Office of Scientific and Technical Information (OSTI), November 2009. http://dx.doi.org/10.2172/967391.

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Armstrong, Neal R. Asymmetric Semiconductor Nanorod/Oxide Nanoparticle Hybrid Materials: Model Nanomaterials for Light-Activated Formation of Fuels from Sunlight. Formal Progress Report -- Award DE-FG02-05ER15753. Office of Scientific and Technical Information (OSTI), June 2017. http://dx.doi.org/10.2172/1365549.

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