Artykuły w czasopismach: „Mobile nanoparticles”

1

Gong, Shuting, Tianyi Wang, Jiaping Lin i Liquan Wang. "Patterning of Polymer-Functionalized Nanoparticles with Varied Surface Mobilities of Polymers". Materials 16, nr 3 (1.02.2023): 1254. http://dx.doi.org/10.3390/ma16031254.

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The polymers can be either dynamically tethered to or permanently grafted to the nanoparticle to produce polymer-functionalized nanoparticles. The surface mobility of polymer ligands with one end anchored to the nanoparticle can affect the surface pattern, but the effect remains unclear. Here, we addressed the influence of lateral polymer mobility on surface patterns by performing self-consistent field theory calculations on a modeled polymer-functionalized nanoparticle consisting of immobile and mobile brushes. The results show that except for the radius of nanoparticles and grafting density, the fraction of mobile brushes substantially influences the surface patterning of polymer-functionalized nanoparticles, including striped patterns and patchy patterns with various patches. The number of patches on a nanoparticle increases as the fraction of mobile brushes decreases, favored by the entropy of immobile brushes. Critically, we found that broken symmetry usually occurs in patchy nanoparticles, associated with the balance of enthalpic and entropic effects. The present work provides a fundamental understanding of the dependence of surface patterning on lateral polymer mobility. The work could also guide the preparation of diversified nanopatterns, especially for the asymmetric patchy nanoparticles, enabling the fundamental investigation of the interaction between polymer-functionalized nanoparticles.

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Kim, Haneul, Muhammad Numan i Changbum Jo. "Catalytic Dehydration of Ethanol over WOx Nanoparticles Supported on MFI (Mobile Five) Zeolite Nanosheets". Catalysts 9, nr 8 (6.08.2019): 670. http://dx.doi.org/10.3390/catal9080670.

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Ethylene can be synthesized in a renewable manner by dehydrating bioethanol over supported metal oxide nanoparticle catalysts. Here, a series of nanoparticulate tungsten oxides supported on MFI (Mobil five) zeolite nanosheets was prepared at different W loadings (1 to 6 mol %) using the incipient wetness method and investigated with respect to the ability to catalyze the dehydration of ethanol. The resulting samples were characterized by X-ray diffraction, electron microscopy, N2 isotherms, X-ray absorption fine structures, and by the temperature-programmed desorption of NH3. The results obtained showed that WOx nanoparticles were homogeneously distributed over the entire void space of nanosheet samples up to a loading of 2 mol %, after which large WOx nanoparticles with needle-like morphology were formed on the surface of the zeolite nanosheet beyond 2mol%. The number of acid sites increased with WOx loading and, as a result, EtOH conversion progressively increased with WOx loading up to 6 mol %. At reaction temperatures of >390 °C, homogeneously distributed WOx nanoparticles showed slightly higher ethylene selectivity than nano-needle structured WOx. However, nano-needle structured WOx exhibited greater catalytic stability. In terms of ethylene yield over 8 h, needle-like WOx nanoparticles were found to be more suitable for the acid-catalyzed dehydration of ethanol than small-sized WOx nanoparticles.

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Lisovsky, A. F. "Thermodynamics of the consolidation of nanoparticles and a macrowparticle". Science of Sintering 42, nr 1 (2010): 15–24. http://dx.doi.org/10.2298/sos1001015l.

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The thermodynamic study of the particle consolidation process in a system consisting of nanoparticles, inclusions of macroparticles, and mobile phase (gas, vapor, liquid) has been conducted. The thermodynamic functions describing this process have been derived. The conditions have been established, under which the process of consolidation proceeds to the end; the conditions, under which the process does not take place in terms of thermodynamics; and the conditions, under which only certain phases consolidate. It has been shown that in this system there are diffusion flows of the substance from nanoparticles to the macrophase. The conditions have been defined, under which a nanoparticle or a group of nanoparticles can be in an equilibrium state and maintain the size and shape arbitrarily long.

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Verberg, Rolf, Alexander Alexeev i Anna C. Balazs. "Modeling the release of nanoparticles from mobile microcapsules". Journal of Chemical Physics 125, nr 22 (14.12.2006): 224712. http://dx.doi.org/10.1063/1.2404955.

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José-Yacamán, M., C. Gutierrez-Wing, M. Miki, D. Q. Yang, K. N. Piyakis i E. Sacher. "Surface Diffusion and Coalescence of Mobile Metal Nanoparticles". Journal of Physical Chemistry B 109, nr 19 (maj 2005): 9703–11. http://dx.doi.org/10.1021/jp0509459.

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Qi, Zhichong, Lunliang Zhang i Wei Chen. "Transport of graphene oxide nanoparticles in saturated sandy soil". Environ. Sci.: Processes Impacts 16, nr 10 (2014): 2268–77. http://dx.doi.org/10.1039/c4em00063c.

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Peng, Xinsheng, Baohong Li, Min Hu, Yahao Ling, Yuan Tian, Yanxing Zhou i Yanfang Zhou. "Quantitative Analysis of Matrine in Liquid Crystalline Nanoparticles by HPLC". Journal of Analytical Methods in Chemistry 2014 (2014): 1–4. http://dx.doi.org/10.1155/2014/368682.

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A reversed-phase high-performance liquid chromatographic method has been developed to quantitatively determine matrine in liquid crystal nanoparticles. The chromatographic method is carried out using an isocratic system. The mobile phase was composed of methanol-PBS(pH6.8)-triethylamine (50 : 50 : 0.1%) with a flow rate of 1 mL/min with SPD-20A UV/vis detector and the detection wavelength was at 220 nm. The linearity of matrine is in the range of 1.6 to 200.0 μg/mL. The regression equation isy=10706x-2959(R2=1.0). The average recovery is 101.7%;RSD=2.22% (n=9). This method provides a simple and accurate strategy to determine matrine in liquid crystalline nanoparticle.

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Nivedhita G, Rajeshkumar S, Anitha Roy, Nagalingam M i Lakshmi T. "Maranta arundinacea root assisted zinc oxide nanoparticles and its characterisation using TEM and UV-vis spectroscopy". International Journal of Research in Pharmaceutical Sciences 11, nr 3 (6.07.2020): 2968–72. http://dx.doi.org/10.26452/ijrps.v11i3.2387.

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Arrow root is a tropical root crop cultivated for its starchy rhizomes that have carbohydrate contents. Zinc oxide nanoparticles have emerged a promising potential in biomedicine, especially in the fields of anticancer, wound healing, free radical scavenging and antimicrobial including antibacterial, antifungal and antiviral research fields, which might be worried with their potent ability to trigger extra reactive oxygen species (ROS) production, launch zinc ions, and induce mobile apoptosis. 1 gram of Arrow root powder extract was mixed with 100 mL of water and filtered for nanoparticles synthesis. The zinc sulphate was used as a precursor for the zinc oxide nanoparticles synthesis and 30 mM was used. 50 mL of freshly prepared root extract and zinc sulphate solution was added together for the synthesis of Zinc oxide nanoparticles, which was then dried and characterisedcharacterized using transmission electron microscope (TEM) and during reaction it was characterized using UVvis spectroscopy method. A spherical shaped nanoparticle with plant extract in the background was observed. The peak at 300 nm confirm the nanoparticles synthesis using root extract. Based on our results we confirmed the capability of arrow root for the zinc oxide nanoparticles synthesis and it will be used for the various biomedical application in future.

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Chan, S. K., S. K. Lok, G. Wang, Y. Cai, Y. J. Wang, N. Wang i I. K. Sou. "Formation mechanism of nanotrenches induced by mobile catalytic nanoparticles". Applied Physics Letters 92, nr 18 (5.05.2008): 183102. http://dx.doi.org/10.1063/1.2912130.

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Sin, Y. K. "Usage of Mobile Application in Assisting Chemical Experiments". Special Issue No.1 1, nr 1 (1.07.2020): 30–40. http://dx.doi.org/10.33093/ijcm.2020.1.x1.3.

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ChemEx is a mobile application that is created to assist students in performing chemical experiments. Students who study Bachelor of Electronic Engineering majoring in Nanotechnology use chemical experiment to synthesise nanoparticles. Through observation, they lack of confidence during the nanoparticles synthesis because they were not involved in any chemistry activities after foundation. To overcome this issue, a mobile application called ChemEx is created using Android Studio. In ChemEx, the usage of apparatuses and instruments, lab safety, the concept molarity and dilution, as well as the data of chemicals are introduced. Pre and post-test are used to evaluate the effectiveness of ChemEx in helping the students. Besides this, feedback form is used to evaluate the satisfaction of students after using ChemEx. The pre and post-test results show that the students have improved their understanding in apparatuses, safety, molarity and dilution. In the meantime, feedbacks show students are satisfied using ChemEx.

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Nádasi, Hajnalka, Áurea Corradi, Ralf Stannarius, Karin Koch, Annette M. Schmidt, Satoshi Aya, Fumito Araoka i Alexey Eremin. "The role of structural anisotropy in the magnetooptical response of an organoferrogel with mobile magnetic nanoparticles". Soft Matter 15, nr 18 (2019): 3788–95. http://dx.doi.org/10.1039/c9sm00219g.

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Muuronen, Mikko, Shane M. Parker, Enrico Berardo, Alexander Le, Martijn A. Zwijnenburg i Filipp Furche. "Mechanism of photocatalytic water oxidation on small TiO2 nanoparticles". Chemical Science 8, nr 3 (2017): 2179–83. http://dx.doi.org/10.1039/c6sc04378j.

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Spada, Simone, Stefano Maset i Klemen Bohinc. "Interaction between like-charged surfaces mediated by uniformly charged counter-nanoparticles". International Journal of Modern Physics B 33, nr 10 (20.04.2019): 1950092. http://dx.doi.org/10.1142/s0217979219500929.

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An electric interfacial layer appears when the mobile ions or nanoparticles of an electrolyte solution interact with an extended, charged surface. The distribution of ions or nanoparticles is driven by electrostatic interactions and entropy. We consider continuously charged spherical nanoparticles of finite size. At thermodynamic equilibrium, the spatial profile of the concentration is obtained by deriving the appropriate Euler–Lagrange equations. We discuss how various model parameters of the nanoparticles influence structural properties of the electric interfacial layer. We calculate the pressure between two like-charged surfaces embedded in a water solution of continuously charged spherical nanoparticles.

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Poggialini, F., B. Campanella, S. Giannarelli, E. Grifoni, S. Legnaioli, G. Lorenzetti, S. Pagnotta, A. Safi i V. Palleschi. "Green-synthetized silver nanoparticles for Nanoparticle-Enhanced Laser Induced Breakdown Spectroscopy (NELIBS) using a mobile instrument". Spectrochimica Acta Part B: Atomic Spectroscopy 141 (marzec 2018): 53–58. http://dx.doi.org/10.1016/j.sab.2018.01.005.

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Monteiro, Lis Marie, Guilherme Diniz Tavares, Elizabeth Igne Ferreira, Vladi Olga Consiglieri, Nadia Araci Bou-Chacra i Raimar Löbenberg. "Reverse phase high-performance liquid chromatography for quantification of hydroxymethylnitrofurazone in polymeric nanoparticles". Brazilian Journal of Pharmaceutical Sciences 51, nr 3 (wrzesień 2015): 561–67. http://dx.doi.org/10.1590/s1984-82502015000300008.

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Hydroxymethylnitrofurazone (NFOH) is a new compound with potential leishmanicidal and trypanocidal activity. Despite its effectiveness, the formulators have to overcome its poor aqueous solubility. Recently, polymeric nano-scale drug delivery systems have proposed for the treatment of neglected diseases. As several studies have confirmed the advantages of such formulations, and this approach provides new analytical challenges, including the need to detect trace amounts of the drug. A suitable method was developed and validated for NFOH determination bound to poly (n-butylcyanoacrylate) (PBCA) nanoparticles. The chromatographic separation was achieved using a C18 column maintained at 25 ºC and an isocratic mobile phase consisting of water and acetonitrile: 80:20 (v/v) at a flow rate of 1.2 mL min-1 and UV-detection at 265 nm. Investigated validation parameters included selectivity, linearity, accuracy, precision and robustness (changes in column temperature, mobile phase composition and flow). The method was specific, the peak of NFOH had no interference with any nanoparticle excipients and no co-elution with main degradation product (nitrofurazone). Linearity was over the range of 0.94 13.11 μg mL-1 (r2=0.999). The method was accurate and precise, recovery of 100.7%, RSD of 0.4%; intra-day and inter-day RSD range 9.98-9.99 μg mL-1 and 0.3% to 0.5%, respectively. Robustness confirmed that method could resist the applied changes. Application of the optimized method revealed an encapsulation efficiency of 64.4% (n=3). Therefore, the method was successfully developed and validated for the determination of the encapsulation efficiency of NFOH-PBCA nanoparticles.

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Dwiastuti, Rini, Marchaban Marchaban, Enade Perdana Istyastono i Florentinus Dika Octa Riswanto. "Analytical Method Validation and Determination of Free Drug Content of 4-n-Butylresorcinol in Complex Lipid Nanoparticles Using RP-HPLC Method". Indonesian Journal of Chemistry 18, nr 3 (30.08.2018): 496. http://dx.doi.org/10.22146/ijc.28919.

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Lipid nanoparticles, one of nanoparticle technology results has been developed both as a drug delivery system and as a research object. Complex lipid nanoparticle, in the drug delivery system development, has an advantage due to its less toxicity. It is important to develop a validated analytical method to determine the drug content in the system of nanoparticle lipid. This research aimed to develop a valid RP-HPLC method to determine free drug content of 4-n-butylresorcinol in the liposome matrix followed by the determination of the encapsulation efficiency (EE%). A system of the RP-HPLC method has been developed using a column of C18 and methanol-redistilled water-glacial acetic acid 79:20:1 (v/v) as the mobile phase with pH maintained at 2.1–2.6. This method was validated in the parameters of selectivity, sensitivity, linearity, accuracy, and precision. During 30 days of storage, the complex lipid nanoparticle system showed the increase in the EE% value during storage time.

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Jin Nam, Hyun, Young Sun Kim, Yoon Jin Kim, Su-Yong Nam i Sung-Hoon Choa. "Enhanced Conductivity in Highly Stretchable Silver and Polymer Nanocomposite Conductors". Journal of Nanoscience and Nanotechnology 21, nr 6 (1.06.2021): 3218–26. http://dx.doi.org/10.1166/jnn.2021.19309.

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In stretchable conductors, there is a trade-off relationship between the stretchability and conductivity which makes it difficult to increase both properties simultaneously. From a practical point of view, however, high conductivity is a more important parameter for real-world applications of wearable and mobile electronics. To obtain a highly conductive stretchable conductor, we developed a stretchable conductor composed of silver (Ag) flat-type microparticles, Ag nanoparticles and a polyester binder. The printed stretchable conductor was then sintered using the intense pulse light sintering technique. The effects of different mixing ratios of Ag flat-type particles and nanoparticles on dispersibility, printability, surface properties, conductivity, and stretchability were examined. Increasing the content of Ag-flat type particles in the composite improved dispersibility, printability, and conductivity. The stretchable conductor exhibited the outstanding conductivity of 5.5×106 S/m. Increasing the Ag nanoparticles content increased the stretchability of the conductor. As the nanoparticle content increased to 30%, the stretchable conductor showed the excellent stretchability of 210%, and withstood 2,600 repeated stretching cycles at a fixed tensile strain of 50%. The conductors also exhibited superb foldability during 10,000 repeated folding tests, up to a radius of 1 mm, without any failures.

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Verberg, Rolf, Alex T. Dale, Prashant Kumar, Alexander Alexeev i Anna C. Balazs. "Healing substrates with mobile, particle-filled microcapsules: designing a ‘repair and go’ system". Journal of The Royal Society Interface 4, nr 13 (3.10.2006): 349–57. http://dx.doi.org/10.1098/rsif.2006.0165.

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We model the rolling motion of a fluid-driven, particle-filled microcapsule along a heterogeneous, adhesive substrate to determine how the release of the encapsulated nanoparticles can be harnessed to repair damage on the underlying surface. We integrate the lattice Boltzmann model for hydrodynamics and the lattice spring model for the micromechanics of elastic solids to capture the interactions between the elastic shell of the microcapsule and the surrounding fluids. A Brownian dynamics model is used to simulate the release of nanoparticles from the capsule and their diffusion into the surrounding solution. We focus on a substrate that contains a damaged region (e.g. a crack or eroded surface coating), which prevents the otherwise mobile capsule from rolling along the surface. We isolate conditions where nanoparticles released from the arrested capsule can repair the damage and thereby enable the capsules to again move along the substrate. Through these studies, we establish guidelines for designing particle-filled microcapsules that perform a ‘repair and go’ function and thus, can be utilized to repair damage in microchannels and microfluidic devices.

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Frolov, Georgiy Aleksandrovich, Irina Aleksandrovna Lundovskikh, Marina Robertovna Shabalina, Mikhail Borisovich Tarasov, Ivan Petrovich Pogorelskiy, Konstantin Igorevich Gurin i Aleksandr Viktorovich Mironin. "Morphofunctional changes in Bacillus cereus cells under the influence of nanoparticles of metals and metal oxides". Disinfection affairs, nr 4 (grudzień 2020): 5–18. http://dx.doi.org/10.35411/2076-457x-2020-4-5-18.

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The results are presented of the comparative study of the presence of characteristic features of disorders of the microstructural organization of the test strain B. cereus ATCC 10702 cells by stable nanoparticles of silver, gold, platinum, zinc oxide and titanium dioxide with loss of cell viability during their interaction with nanoparticles in an aqueous medium using methods of bacteriology and electron microscopy. General size-dependent features of the effect of nanoparticles on B. cereus ATCC 10702 cells and differences associated with both the adsorption of metal oxide and noble metal nanoparticles on the surface of bacteria and the loss of viability of bacterial cells with different levels of their destruction, reaching 67-70 % in the case of nanoparticles noble metals, were found. The chemistry of the effects of silver, gold, platinum and zinc and titanium oxides nanoparticles on the test microbe B. cereus ATCC 10702 is considered. The assumption is made that the main feature of the interaction of nanodispersed structures based on noble metals and metal oxides is not associated with an increase in the specific contact surface of the dispersed phase, but with a significant increase in the specific surface energy, which leads to the modification of the multilayer hydrated water shells surrounding nanoparticles. The measured zeta (ζ-)-potential of metal and metal oxides nanoparticles characterizes the total effect formed on the diffusion-mobile boundary of the nanoparticle; its value is a quantitative characteristic of the equilibrium energy state of dispersed systems acting as biocatalysts of intracellular enzymes and causing hydrolysis of the polymer structures of cytoplasmic membranes and cell membranes and ultimately the death of microbial cells. The obtained experimental data can be used in creation effective antimicrobial compositions.

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Lv, Mingxin, Qianghua Xin, Bing Bian, Shitao Yu, Shiwei Liu, Lu Li, Congxia Xie i Yue Liu. "One-pot synthesis of highly active and hydrothermally stable Pd@mHSiO2 yolk–shell-structured nanoparticles for high-temperature reactions in hydrothermal environments". Dalton Transactions 49, nr 2 (2020): 418–30. http://dx.doi.org/10.1039/c9dt04293h.

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The facile synthesis of yolk–shell-structured nanoparticles (YSNPs) with mobile active metal cores and mesoporous inorganic–organic hybrid silica shells (mHSiO₂) is important for their applications.

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Qasim, Irfan, M. Mumtaz, K. Nadeem i S. Qamar Abbas. "Zinc Nanoparticles at Intercrystallite Sites of (Cu0.5Tl0.5)Ba2Ca3Cu4O12−δSuperconductor". Journal of Nanomaterials 2016 (2016): 1–6. http://dx.doi.org/10.1155/2016/9781790.

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We synthesizedZnx/(Cu0.5Tl0.5)Ba2Ca3Cu4O12-δ {Znx/CuTl-1234}(x= 0~3 wt.%)nanoparticles-superconductor composites by solid-state reaction technique and examined the effects of zinc (Zn) nanoparticles on structural and superconducting properties of CuTl-1234 phase. Unaltered crystal structure of host CuTl-1234 phase confirmed the existence of Zn nanoparticles at intercrystallite sites. We observed an improvement in grains size and intergrains connectivity by healing up the voids after incorporation of Zn nanoparticles in CuTl-1234 superconductor. Superconducting properties ofZnx/CuTl-1234 composites were suppressed for all Zn nanoparticles concentrations. Suppression of zero resistivity critical temperature{Tc(0)}and variation in normal state resistivity{ρ300 K (Ω-cm)}were attributed to reduction of superconducting volume fractions and enhanced scattering cross section of mobile carriers.

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Philipse, Albert P., Bonny W. M. Kuipers i Agienus Vrij. "A thermodynamic gauge for mobile counter-ions from colloids and nanoparticles". Faraday Discussions 181 (2015): 103–21. http://dx.doi.org/10.1039/c4fd00261j.

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A thermodynamic equilibrium sensor is proposed that measures the ratio of the number of elementary charges z to the mass m of charged solutes such as charged colloids and nanoparticles. The sensor comprises a small, membrane-encapsulated salt solution volume that absorbs neutral salt molecules in response to the release of mobile counter-ions by charge carriers in the surrounding suspension. The sensor state emerges as a limiting case of the equilibrium salt imbalance, and the ensuing osmotic pressure difference, between arbitrary salt and suspension volumes. A weight concentration of charge carriers c is predicted to significantly increase the sensor's salt number density from its initial value ρ_s,0 to ρRs, according to the relation (ρRs/ρ_s,0)² − 1 = zc/mρ_s,0, under the assumption that the mobile ions involved in the thermodynamic sensor-suspension equilibrium are ideal and homogeneously distributed.

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Carrillo, Cristihan, Tyne R. Johns, Haifeng Xiong, Andrew DeLaRiva, Sivakumar R. Challa, Ronald S. Goeke, Kateryna Artyushkova, Wei Li, Chang H. Kim i Abhaya K. Datye. "Trapping of Mobile Pt Species by PdO Nanoparticles under Oxidizing Conditions". Journal of Physical Chemistry Letters 5, nr 12 (30.05.2014): 2089–93. http://dx.doi.org/10.1021/jz5009483.

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Chai, Shengchao, Xiao Cao, Fengrui Xu, Liang Zhai, Hu-Jun Qian, Quan Chen, Lixin Wu i Haolong Li. "Multiscale Self-Assembly of Mobile-Ligand Molecular Nanoparticles for Hierarchical Nanocomposites". ACS Nano 13, nr 6 (3.06.2019): 7135–45. http://dx.doi.org/10.1021/acsnano.9b02569.

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Zhou, Yanfang, Chunlian Guo, Hongying Chen, Yudai Zhang, Xinsheng Peng i Ping Zhu. "Determination of Sinomenine in Cubosome Nanoparticles by HPLC Technique". Journal of Analytical Methods in Chemistry 2015 (2015): 1–5. http://dx.doi.org/10.1155/2015/931687.

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We applied HPLC technique to quantitatively analyze sinomenine in cubosome nanoparticles. The chromatographic method was performed by using an isocratic system. The mobile phase was composed of methanol-PBS(pH6.8)-triethylamine (50 : 50 : 0.1%) with a flow rate of 1 mL/min; the detection wavelength was at 265 nm. Sinomenine can be successfully separated with good linearity (the regression equation is A=10835C+1058; R2=1.0) and perfect recovery (102.2%). The chromatograph technique was proper for quality control of sinomenine in cubosome nanoparticles.

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Mishra, S. R., Debi P. Bhatta, J. K. Dash i Oluwole Daniel Makinde. "A Semi-Analytical Approach to Time Dependent Squeezing Flow of Cu and Ag Water-Based Nanofluids". Defect and Diffusion Forum 393 (czerwiec 2019): 121–37. http://dx.doi.org/10.4028/www.scientific.net/ddf.393.121.

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Study reveals the axisymmetric squeezing flow of nanofluids through two parallel plates. Both Copper (Cu) and Silver (Ag) nanoparticles along with water treated as base fluid have been taken into consideration. Viscous dissipation effect and velocity slip both enhance the present study. The non-dimensional form of governing nonlinear ODEs is obtained with the suitable choice of similarity transformation. The complex ODEs are solved analytically imposing Adomain Decomposition Method (ADM). The influence of emerging parameters such as nanoparticle volume fraction, unsteadiness parameter, Eckert number, etc. have been described by visualizing graphically and the tabular values represent the unknown coefficient and computation is made for various values of physical parameters. The present result is compatible with the earlier which confirms the accuracy of the solution procedure. It reveals that point of inflection is marked in the velocity profiles of both Ag and Cu water nanofluids for the effects of various physical parameters. Squeezing number play a vital role in the velocity profile and it is observed that near the lower plate Ag nanoparticle dominates over Cu nanoparticles and further, after the middle of the channel the effect is reversed. 2010 Mathematics Subject Classification: 76D05, 76D10, 76M60, 76S05. *Corresponding Author’s Email: HYPERLINK "mailto:satyaranjan_mshr@yahoo.co.in" satyaranjan_mshr@yahoo.co.in Mobile No.: (+91)-9937169245

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Pacheco, Marta, Beatriz Jurado-Sánchez i Alberto Escarpa. "Lab-on-a-micromotor: catalytic Janus particles as mobile microreactors for tailored synthesis of nanoparticles". Chemical Science 9, nr 42 (2018): 8056–64. http://dx.doi.org/10.1039/c8sc03681k.

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Kuzovkov, V. N., G. Zvejnieks i E. A. Kotomin. "Theory of non-equilibrium critical phenomena in three-dimensional condensed systems of charged mobile nanoparticles". Phys. Chem. Chem. Phys. 16, nr 27 (2014): 13974–83. http://dx.doi.org/10.1039/c3cp55181d.

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Urbanski, Martin, i Jan P. F. Lagerwall. "Nanoparticles dispersed in liquid crystals: impact on conductivity, low-frequency relaxation and electro-optical performance". Journal of Materials Chemistry C 4, nr 16 (2016): 3485–91. http://dx.doi.org/10.1039/c6tc00659k.

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Bhattacharya, S., i A. Ghosh. "Effect of ZnO Nanoparticles on the Structure and Ionic Relaxation of Poly(ethylene oxide)-LiI Polymer Electrolyte Nanocomposites". Journal of Nanoscience and Nanotechnology 8, nr 4 (1.04.2008): 1922–26. http://dx.doi.org/10.1166/jnn.2008.18257.

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The effect of ZnO nanoparticles on the structure and ionic relaxation of LiI salt doped poly(ethylene oxide) (PEO) polymer electrolytes has been investigated. X-ray diffraction, high resolution transmission electron microscopy and field emission scanning electron microscopy show that ZnO nanoparticles dispersed in the PEO-LiI polymer electrolyte reduce the crystallinity of PEO and increase relative smoothness of the surface morphology of the nanocomposite electrolyte. The electrical conductivity of the nanocomposites is found to increase due to incorporation of ZnO nanoparticles. We have shown that the structural modification due to insertion of ZnO nanoparticles results in the enhancement of the mobility i.e., the hopping rate of mobile Li+ ions and hence the ionic conductivity of PEO-LiI-ZnO nanocomposite electrolyte.

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Dallacasa, V. "Enhanced Size-Dependent Piezoelectricity in Nanostructured Films". ISRN Materials Science 2012 (8.05.2012): 1–5. http://dx.doi.org/10.5402/2012/894072.

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We have developed a nanogenerator that is driven by mechanical forces to produce continuous direct-current output. The nanogenerator was fabricated with titanium dioxide nanoparticle arrays forming a Schottky barrier with a conducting electrode with a small gap. Under uniaxial mechanical compression, nanogenerators have shown repeatable and consistent electrical outputs with energy-conversion efficiency of order of magnitude at least comparable to similar nanogenerators based on piezoelectric materials. Flexoelectricity due to inhomogeneous strain induced in the nanostructured film has been identified as one possible mechanism of the high apparent piezoelectricity in the nanoparticles. The approach presents an adaptable, mobile, and cost-effective technology for harvesting mechanical energy from the environment. At the present stage it offers a potential solution for powering nanodevices.

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Hsu, Miao-Hsing, Wei-Feng Fang, Yu-Hsuan Lai, Jing-Tang Yang, Tsung-Lin Tsai i Dar-Bin Shieh. "Enhanced mobile hybridization of gold nanoparticles decorated with oligonucleotide in microchannel devices". Lab on a Chip 10, nr 19 (2010): 2583. http://dx.doi.org/10.1039/c004753h.

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Hasen, Huda Majid, i Rasha Jasim Tuama. "Review about the Applications of Nanoparticles in Batteries". Journal of Engineering 29, nr 08 (1.08.2023): 47–60. http://dx.doi.org/10.31026/j.eng.2023.08.04.

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Nanoparticles are defined as an organic or non-organic structure of matter in at least one of its dimensions less than 100 nm. Nanoparticles proved their effectiveness in different fields because of their unique physicochemical properties. Using nanoparticles in the power field contributes to cleaning and decreasing environmental pollution, which means it is an environmentally friendly material. It could be used in many different parts of batteries, including an anode, cathode, and electrolyte. This study reviews different types of nanoparticles used in Lithium-ion batteries by collecting the advanced techniques for applying nanotechnology in batteries. In addition, this review presents an idea about the advantages and disadvantages of using nanoparticles in batteries to harness energy without harming the environment. This review showed that applying nanotechnology and using nanoparticles in the production technique of batteries open the field for developing energy storage in Nano sized batteries. This, in turn, is important in the new era of technology in the industries of electronic devices and precision electrical appliances such as mobile phones, digital cameras, etc.

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Nastulyavichus, Alena, Eteri Tolordava, Andrey Rudenko, Darya Zazymkina, Pavel Shakhov, Nikolay Busleev, Yulia Romanova, Andrey Ionin i Sergey Kudryashov. "In Vitro Destruction of Pathogenic Bacterial Biofilms by Bactericidal Metallic Nanoparticles via Laser-Induced Forward Transfer". Nanomaterials 10, nr 11 (15.11.2020): 2259. http://dx.doi.org/10.3390/nano10112259.

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A novel, successful method of bactericidal treatment of pathogenic bacterial biofilms in vitro by laser-induced forward transfer of metallic nanoparticles from a polyethylene terephthalate polymeric substrate was suggested. Transferred nanoparticles were characterized by scanning and transmission electron microscopy, energy-dispersive X-ray and Raman spectroscopy. The antibacterial modality of the method was tested on Gram-positive (Staphylococcus aureus) and Gram-negative (Pseudomonas Aeruginosa) bacterial biofilms in vitro, revealing their complete destruction. The proposed simple, cost-effective and potentially mobile biofilm treatment method demonstrated its high and broad bactericidal efficiency.

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Raagulan, Kanthasamy, Ramanaskanda Braveenth, Lee Ro Lee, Joonsik Lee, Bo Kim, Jai Moon, Sang Lee i Kyu Chai. "Fabrication of Flexible, Lightweight, Magnetic Mushroom Gills and Coral-Like MXene–Carbon Nanotube Nanocomposites for EMI Shielding Application". Nanomaterials 9, nr 4 (2.04.2019): 519. http://dx.doi.org/10.3390/nano9040519.

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MXenes, carbon nanotubes, and nanoparticles are attractive candidates for electromagnetic interference (EMI) shielding. The composites were prepared through a filtration technique and spray coating process. The functionalization of non-woven carbon fabric is an attractive strategy. The prepared composite was characterized using X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), scanning electron microscope (SEM), energy-dispersive X-ray spectroscopy (EDX), and Raman spectroscopy. The MXene-oxidized carbon nanotube-sodium dodecyl sulfate composite (MXCS) exhibited 50.5 dB (99.999%), and the whole nanoparticle-based composite blocked 99.99% of the electromagnetic radiation. The functionalization increased the shielding by 15.4%. The composite possessed good thermal stability, and the maximum electric conductivity achieved was 12.5 S·cm−1. Thus, the composite shows excellent potential applications towards the areas such as aeronautics, mobile phones, radars, and military.

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Rodrigues, Caroline Danziato, Najeh Maissar Khalil i Rubiana Mara Mainardes. "Determination of amphotericin B in PLA-PEG blend nanoparticles by HPLC-PDA". Brazilian Journal of Pharmaceutical Sciences 50, nr 4 (grudzień 2014): 859–68. http://dx.doi.org/10.1590/s1984-82502014000400021.

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In this work, we developed and validated an effective reversed-phase HPLC method with photodiode array (PDA) detection for the quantitative analysis of amphotericin B (AmB) in poly(lactide)-poly(ethylene glycol) (PLA-PEG) blend nanoparticles. Chromatographic runs were performed on a reverse phase C18 column using a mobile phase comprising a 9% acetic acid and acetonitrile mixture (40:60, v/v) under isocratic elution with a flow rate of 1 mL/min. AmB was detected at a wavelength of 408 nm. The validation process was performed considering the selectivity, linearity, precision, accuracy, robustness, limit of detection (LOD) and limit of quantitation (LOQ) of the method. A concentration range of 1-20 µg/mL was used to construct a linear calibration curve. The LOQ and LOD were 55 and 18 ng/mL, respectively. The mean recovery of AmB from the samples was 99.92% (relative standard deviation (RSD) = 0.34%, n=9), and the method was robust for changes in the flow rate of the mobile phase (maximum RSD=4.82%). The intra- and inter-assay coefficients of variation were less than 0.59%. The method was successfully used to determine the entrapment efficiency of AmB in PLA-PEG blend nanoparticles.

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da Rocha Lindner, Gabriela, Najeh Maissar Khalil i Rubiana Mara Mainardes. "Resveratrol-Loaded Polymeric Nanoparticles: Validation of an HPLC-PDA Method to Determine the Drug Entrapment and Evaluation of Its Antioxidant Activity". Scientific World Journal 2013 (2013): 1–9. http://dx.doi.org/10.1155/2013/506083.

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Poly(lactic acid) (PLA) and PLA-poly(ethylene glycol) (PLA-PEG) nanoparticles containing resveratrol (RVT) were developed, and their antioxidant activity was evaluated. An analytical method using high performance liquid chromatography (HPLC)/photodiode array (PDA) detection was also developed and validated for RVT determination in nanoparticles. The mobile phase consisted of methanol : water (51 : 49, v/v) flowed at 0.9 mL/min, and the PDA detector was set at wavelength of 306 nm. The mean diameter of the nanoparticles varied between 180 and 220 nm, and the encapsulation efficiency of RVT ranged from 60% to 88%. The nanoparticles containing RVT were evaluated for their ability to scavenge the radical (2,2-azinobis (3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt) (ABTS•+). The profile obtained from the PLA nanoparticles containing RVT demonstrated that after 24 h, there was almost no increase in antioxidant activity, which was lower than that of the free RVT and RVT-loaded PLA-PEG nanoparticles. For PLA-PEG nanoparticles, the radical-scavenging activity of RVT was shown to increase with time, and after 48 h, it was similar to that observed with free RVT.

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Li, Shuang, Ziyue Qin, Jie Fu i Qiya Gao. "Nanobiosensing Based on Electro-Optically Modulated Technology". Nanomaterials 13, nr 17 (23.08.2023): 2400. http://dx.doi.org/10.3390/nano13172400.

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At the nanoscale, metals exhibit special electrochemical and optical properties, which play an important role in nanobiosensing. In particular, surface plasmon resonance (SPR) based on precious metal nanoparticles, as a kind of tag-free biosensor technology, has brought high sensitivity, high reliability, and convenient operation to sensor detection. By applying an electrochemical excitation signal to the nanoplasma device, modulating its surface electron density, and realizing electrochemical coupling SPR, it can effectively complete the joint transmission of electrical and optical signals, increase the resonance shift of the spectrum, and further improve the sensitivity of the designed biosensor. In addition, smartphones are playing an increasingly important role in portable mobile sensor detection systems. These systems typically connect sensing devices to smartphones to perceive different types of information, from optical signals to electrochemical signals, providing ideas for the portability and low-cost design of these sensing systems. Among them, electrochemiluminescence (ECL), as a special electrochemically coupled optical technology, has good application prospects in mobile sensing detection due to its strong anti-interference ability, which is not affected by background light. In this review, the SPR is introduced using nanoparticles, and its response process is analyzed theoretically. Then, the mechanism and sensing application of electrochemistry coupled with SPR and ECL are emphatically introduced. Finally, it extends to the relevant research on electrochemically coupled optical sensing on mobile detection platforms.

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Pal, Nabanita, Jun-Hyeok Lee i Eun-Bum Cho. "Recent Trends in Morphology-Controlled Synthesis and Application of Mesoporous Silica Nanoparticles". Nanomaterials 10, nr 11 (25.10.2020): 2122. http://dx.doi.org/10.3390/nano10112122.

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The outstanding journey towards the investigation of mesoporous materials commences with the discovery of high surface area porous silica materials, named MCM-41 (Mobil Composition of Matter-41) according to the inventors’ name Mobile scientists in the United States. Based on a self-assembled supramolecular templating mechanism, the synthesis of mesoporous silica has extended to wide varieties of silica categories along with versatile applications of all these types in many fields. These silica families have some extraordinary structural features, like highly tunable nanoscale sized pore diameter, good Brunauer–Emmett–Teller (BET) surface areas, good flexibility to accommodate different organic and inorganic functional groups, metals etc., onto their surface. As a consequence, thousands of scientists and researchers throughout the world have reported numerous silica materials in the form of published articles, communication, reviews, etc. Beside this, attention is also given to the morphology-oriented synthesis of silica nanoparticles and their significant effects on the emerging fields of study like catalysis, energy applications, sensing, environmental, and biomedical research. This review highlights a consolidated overview of those morphology-based mesoporous silica particles, emphasizing their syntheses and potential role in many promising fields of research.

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Ahmad, Nur Suraya, Shahidan Radiman i Wan Zuhairi Wan Yaacob. "Stability and Transportation of Iron Oxide Nanoparticles in Subsurface Water and Soil". ASM Science Journal 14 (20.04.2021): 1–9. http://dx.doi.org/10.32802/asmscj.2020.488.

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Iron oxide nanoparticles are utilised in a broad range of applications (magnetic data storage, biosensing, drug delivery, treatment and remediation of contaminated soil and groundwater); causing noticeable quantities of iron oxide nanoparticles to be released into the environment. In this study, aggregation and stability of iron oxide nanoparticles in water were investigated within the range of pH 3 – pH 9 at a constant concentration of iron oxide nanoparticles and humic acid. The pH of the solution was selected to be continuously monitored at pH 7 to investigate the transportation and deposition behaviour of iron oxide nanoparticles in porous media at different velocities. It was found that iron oxide nanoparticles were aggregated and settle down as settled particles at low pH (pH 3 – pH 5). Iron oxide nanoparticles were stable, mobile and transported at a high pH, which is the pH range of natural water (pH 6.5 – pH 8.5). Iron oxide nanoparticles were strongly attached to the silica sand at natural water velocity in porous media, which is 2.93 ml min-1. Overall, the presence of humic acid in aquifers and porous media, the pH range of natural water (pH 6.5 – pH 8.5) and the slow speed (2.93 ml min-1) of water are expected to be a key factor that enhances the stability and mobility of iron oxide nanoparticles in natural water and porous media.

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Rathnakumar, Sriram, Seemesh Bhaskar, Aayush Rai, Darisi V. V. Saikumar, Naga Sai Visweswar Kambhampati, Venketesh Sivaramakrishnan i Sai Sathish Ramamurthy. "Plasmon-Coupled Silver Nanoparticles for Mobile Phone-Based Attomolar Sensing of Mercury Ions". ACS Applied Nano Materials 4, nr 8 (21.07.2021): 8066–80. http://dx.doi.org/10.1021/acsanm.1c01347.

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Pery, Tal, Katrin Pelzer, Gerd Buntkowsky, Karine Philippot, Hans-Heinrich Limbach i Bruno Chaudret. "Direct NMR Evidence for the Presence of Mobile Surface Hydrides on Ruthenium Nanoparticles". ChemPhysChem 6, nr 4 (15.04.2005): 605–7. http://dx.doi.org/10.1002/cphc.200400621.

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Xiao, Haijun, i Vladimír Sedlařík. "A Rapid and Sensitive HPLC Method for Simultaneous Determination of Irinotecan Hydrochloride and Curcumin in Co-delivered Polymeric Nanoparticles". Journal of Chromatographic Science 58, nr 7 (6.07.2020): 651–60. http://dx.doi.org/10.1093/chromsci/bmaa033.

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Abstract In recent years, a great deal of attention has been paid to the combined use of multiple antitumor drugs for better cancer treatment. The aims of the study are to construct a nanoparticle drug delivery system for the co-delivery of irinotecan hydrochloride and curcumin and to develop an analytical method for simultaneously quantifying these molecules, which is essential for further studies of the co-delivered nano system. The irinotecan hydrochloride and curcumin co-delivered nanoparticle (ICN) were prepared by combinatorially entrapping them into polyethylene glycol–poly lactic acid-co-glycolic acid (PEG–PLGA) polymeric nanoparticles. A simple, sensitive and rapid high-performance liquid chromatography method was developed and validated to simultaneously quantify the compounds in the co-delivered nanoparticle system. Acetonitrile and ultrapure water containing sodium dodecyl sulfate (0.08 mol/L), disodium phosphate (Na2HPO4, 0.002 mol/L) and acetic acid (4%, v/v) were used as the mobile phase and their ratio was set at 50:50. The flow rate was set to 1.0 mL/min, and the temperature in the column oven was maintained at 40°C. The analysis was carried out at 256 and 424 nm to assess irinotecan hydrochloride and curcumin, respectively. Detectors with only one channel can also visualize both analytes in one chromatogram at 379 nm and still demonstrate acceptable sensitivity. The retention times for irinotecan hydrochloride and curium were 3.317 and 5.560 min, respectively. The method developed was confirmed to be sensitive, accurate (recovery, 100 ± 2%), precise (relative standard deviation, RSD ≤ 1%), robust and linear (R2 ≥ 0.9996) in the range from 2.05 to 1050 μg/mL. The presented method has been used to quantify irinotecan hydrochloride and curcumin in the co-delivered ICN nano system to assess the drug delivery quality of the nanoparticles and can also be used for routine analysis because of its simplicity and accuracy.

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Farrakhova, D. S., I. D. Romanishkin, D. V. Yakovlev, Yu S. Maklygina, V. A. Oleinikov, P. V. Fedotov, M. V. Kravchik, L. Bezdetnaya i V. B. Loschenov. "Correlation of spectroscopic and structural properties of indocyanine green j-aggregates". Biomedical Photonics 11, nr 3 (15.11.2022): 4–16. http://dx.doi.org/10.24931/2413-9432-2022-11-3-4-16.

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Indocyanine green (ICG), when in free form in a liquid, can form stable nanoparticle structures or colloidal solution, while changing its spectroscopic properties. In the work, the aggregation degree and the average size of nanoparticles depending on the concentration of a colloidal solution of indocyanine green (ICG NPs) in the form of J-aggregates were investigated by various methods based on light scattering. The size of nanoparticles is an important parameter from the point of view of clinical application, because the technique of intravenous administration of drugs, in order to avoid microvascular thrombosis and embolism, provides dosage forms with inclusions of individual molecules or their clusters, not exceeding 500 nm diameter. In turn, small nanoparticles less than 30 nm lead to prolonged circulation of the drug in the body with an increased possibility of permeation into cells of healthy tissue. In the course of studies, it was found that an increase in the concentration of ICG NPs in the solution leads to an increase in the average size of spontaneously formed J-aggregates, which, in turn, leads to a decrease in the absorption coefficient in the aggregates. Presumably, this phenomenon, i.e. the established nonlinear dependence of the J-aggregate absorption on its size, can be explained by the formation of absorption centers on the J-aggregate surface in the form of mobile surface molecules. The threshold range of ICG molecule concentration was determined, at which there is a transition from aggregation with an increase in size with a slow addition of ICG J-aggregate molecules in height to a rapid addition in width.

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Andriushenko, Peter, Leonid L. Afremov i Maria Chernova. "Simulation of the Motion of Magnetic Nanoparticles in Human Tissues". Solid State Phenomena 215 (kwiecień 2014): 284–87. http://dx.doi.org/10.4028/www.scientific.net/ssp.215.284.

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In this paper an attempt on the basis of the theory of mobile cellular automata to develop a model of motion of magnetic nanoparticles in human organs and tissues. In the framework of the method of movable cellular automata, the simulated system (tissues and organs) is represented by an assembly of interacting automata (elements of finite size). The concept of the method is based on the introduction of a new state type – the state of a pair of automata. Setting various parameters of the medium (tissues and organs). We can vary behavior of these particles in these mediums.

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D., Nirmal. "HIGH PERFORMANCE FLEXIBLE NANOPARTICLES BASED ORGANIC ELECTRONICS". December 2019 2019, nr 02 (24.12.2019): 99–106. http://dx.doi.org/10.36548/jei.2019.2.005.

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The attributes of the organic materials have made them more prominent in a wide range of applications engaged for large or small purpose such as the solar cells or the displays in the mobile devices. The solar cells developed using the organic semiconductors are more advantageous due to their flexibility and their easy installation. Despite the versatile nature of the and easy implementation the organic semiconductors still suffers from low efficiency in term of cost, performance and size. The proposed method incorporates the nanomaterials in the organic solar cell to improvise efficiency (performance) and to minimize the cost as well as the size of the solar cells. The proposed method replaces the semiconductor that is organic by incorporating the organic semiconductors with the nanoparticle additives to have a perfect blending in solution to improve the crystallizations of the semiconductor, and the uniformity thus improvising the power conversion efficiency in the solar cells and minimizing the size and the cost . The result acquired through evaluation proves the performance improvements to 19% form 3.5% in the solar cells.

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Montaña, Maia, María Leguizamón Aparicio, Marco Ocsachoque, Marisa Navas, Ivoneide de C. L. Barros, Enrique Rodriguez-Castellón, Mónica Casella i Ileana Lick. "Zirconia-Supported Silver Nanoparticles for the Catalytic Combustion of Pollutants Originating from Mobile Sources". Catalysts 9, nr 3 (25.03.2019): 297. http://dx.doi.org/10.3390/catal9030297.

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This work presents the physicochemical characterization and activity of zirconia-supported silver catalysts for the oxidation of pollutants present in diesel engine exhaust (propane, propene, naphthalene and soot). A series of silver-supported catalysts AgxZ (x = 1, 5 and 10 wt.%, Z = zirconia) were prepared, which were studied by various characterization techniques. The results show that silver is mainly found under the form of small metal nanoparticles (<10 nm) dispersed over the support. The metallic phase coexists with the AgOx oxidic phases. Silver is introduced onto the zirconia, generating Ag–ZrO2 catalysts with high activity for the oxidation of propene and naphthalene. These catalysts also show some activity for soot combustion. Silver species can contribute with zirconia in the catalytic redox cycle, through a synergistic effect, providing sites that facilitate the migration and availability of oxygen, which is favored by the presence of structural defects. This is a novel application of the AgOx–Ag/ZrO2 system in the combustion reaction of propene and naphthalene. The results are highly promising, given that the T50 values found for both model molecules are quite low.

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Chung, H. J., A. Taubert, R. D. Deshmukh i R. J. Composto. "Mobile nanoparticles and their effect on phase separation dynamics in thin-film polymer blends". Europhysics Letters (EPL) 68, nr 2 (październik 2004): 219–25. http://dx.doi.org/10.1209/epl/i2004-10242-2.

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Liu, Fu-Ken, i Guor-Tzo Wei. "Effect of Mobile-Phase Additives on Separation of Gold Nanoparticles by Size-Exclusion Chromatography". Chromatographia 59, nr 1-2 (styczeń 2004): 115–19. http://dx.doi.org/10.1365/s10337-003-0135-2.

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Negi, Surindra, Vir Singh i Jyoti Rawat. "GREEN SYNTHESIS OF SILVER NANOPARTICLES USING MICROALGAL EXTRACT AND ITS APPLICATION IN METAL ION REMOVAL FROM AQUEOUS SOLUTION". Journal of Experimental Biology and Agricultural Sciences 9, nr 2 (25.04.2021): 214–30. http://dx.doi.org/10.18006/2021.9(2).214.230.

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Heavy metal pollution is of great concern and cannot be ignored as heavy metals are highly mobile in soil and are recalcitrant. Nanotechnology provides a novel sustainable approach for synthesizing materials of desired properties, composition, and structure, it is however expected to adsorb heavy metals and play a significant role in water treatment. Green chemistry is the cost-effective, non-toxic, and environment friendly approach that involves the use of biological components as reducing and stabilizing agents for the synthesis of nanoparticles. In the present study, heavy metals such as cadmium (Cd II) and lead (Pb II) were successfully removed from its aqueous solution by an adsorption process using the silver nanoparticles of size ~15nm biosynthesized using freshwater algal extract. The adsorption peak at 411 nm confirms the formation of silver nanoparticles. The maximum value of metal ion adsorption capacity (23.98 mg/g) was observed for Pb (II). The higher value of R2 showed that the experimental data were fitted best with Langmuir isotherm. The rate kinetics study showed that Pb (II) adsorption on Ag nanoparticles followed pseudo-second order kinetics (R2>0.9) indicating that Pb (II) was attached to the nanoparticles surface through electrostatic force of attraction, also referred to as chemisorption whereas Cd (II) adsorption on Ag nanoparticles followed pseudo-first order kinetics (R2 >0.8) indicating physical adsorption between adsorbate and adsorbent.

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