Articles de revues : « Hybrid-Nano System »

1

Sabadosh, Lyubomyr, Serhii Larkov, Oleg Kravchenko et Vladyslav Sereda. « Increasingly Safe, High-Energy Propulsion System for Nano-Satellites ». Transactions on Aerospace Research 2018, n^o 4 (1 décembre 2018) : 38–44. http://dx.doi.org/10.2478/tar-2018-0028.

Texte intégral

Résumé :

Summary Numerous attempts have been undertaken to develop propulsion systems for nano-satellite-type spacecrafts to enable their maneuvering in orbits. One of the potentially viable chemical propellant propulsion systems is a hybrid system. The present paper studies propellant composition variants with the metal hydride as fuel that can be chosen for a nano-satellite hybrid propulsion system. It defines key requirements for chemical propellant nano-satellite propulsion systems, and specifies potential propellant pairs based on a compact metal hydride. The study describes basic technical characteristics of a 1U CubeSat propulsion system.

Styles APA, Harvard, Vancouver, ISO, etc.

2

Min, Young-Uk, Dong-Yeop Lee et Kyung-Chun Kim. « Development of Hybrid Micro/Nano PIV system ». Journal of the Korean Society of Visualization 8, n^o 4 (31 décembre 2010) : 31–37. http://dx.doi.org/10.5407/jksv.2010.8.4.031.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

3

Choi, Beom-jin. « A Making of Aesthetic Dental restorations with Nano Hybrid Ceramic material by CAD/CAM System ». Journal of the Korean Academy of Esthetic Dentistry 25, n^o 2 (30 décembre 2016) : 98–108. http://dx.doi.org/10.15522/jkaed.2016.25.2.98.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

4

Zhang, Wei, Niraj K. Jha et Li Shang. « A hybrid Nano/CMOS dynamically reconfigurable system—Part II ». ACM Journal on Emerging Technologies in Computing Systems 5, n^o 3 (août 2009) : 1–31. http://dx.doi.org/10.1145/1568485.1568487.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

5

Zhang, Wei, Niraj K. Jha et Li Shang. « A hybrid nano/CMOS dynamically reconfigurable system—Part I ». ACM Journal on Emerging Technologies in Computing Systems 5, n^o 4 (novembre 2009) : 1–30. http://dx.doi.org/10.1145/1629091.1629092.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

6

Fu, Jie, Yuan Wang, Pei-dong Li et Miao Yu. « Research on Hybrid Isolation System for Micro-Nano-Fabrication Platform ». Advances in Mechanical Engineering 6 (1 janvier 2014) : 243247. http://dx.doi.org/10.1155/2014/243247.

Texte intégral

Résumé :

In order to obtain better vibration suppression effect, this paper designs a semiactive/fully active hybrid isolator by using magnetorheological elastomer (MRE) and piezoelectric material. Combined with multimode control scheme, full frequency vibration suppression is achieved. Firstly, series type structure is determined for the hybrid isolator, and the structure of hybrid isolator is designed. Next, the dynamic model of hybrid isolator is derived, the dynamic characteristics measurement for MRE isolator and piezoelectric stack actuator (PSA) is established, and parameters such as voltage-displacement coefficient, stiffness and damping constant are identified from the experimental results, respectively. Meanwhile, the switch frequency is determined by experimental results of PSA and MRE isolator. Lastly, influence of the stiffness of MRE, control voltage of PSA, and intermediate mass on hybrid isolator system is analyzed by simulations, and the results show that the hybrid isolator proposed is effective.

Styles APA, Harvard, Vancouver, ISO, etc.

7

Movlarooy, Tayebeh. « Polythiophene encapsulated inside (13, 0) CNT : A nano-hybrid system ». Chinese Physics B 23, n^o 6 (30 mai 2014) : 066201. http://dx.doi.org/10.1088/1674-1056/23/6/066201.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

8

Omari, Aiman al. « RETRACTED : Superluminal effect in a hybrid nano-electro-optomechanical system ». Chinese Journal of Physics 57 (février 2019) : 435–41. http://dx.doi.org/10.1016/j.cjph.2018.08.024.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

9

Chen, Lianwei, Xiaorui Zheng, Zheren Du, Baohua Jia, Min Gu et Minghui Hong. « A frozen matrix hybrid optical nonlinear system enhanced by a particle lens ». Nanoscale 7, n^o 36 (2015) : 14982–88. http://dx.doi.org/10.1039/c5nr03304g.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

10

HIRANO, Takahiro, Masahiro NAKAJIMA, Masaru KOJIMA et Toshio FUKUDA. « 1A2-V04 Fluorescent Nano-bead-injection into C. elegans by Nanomanipulation System inside Hybrid Microscope(Nano/Micro Manipulation System) ». Proceedings of JSME annual Conference on Robotics and Mechatronics (Robomec) 2012 (2012) : _1A2—V04_1—_1A2—V04_2. http://dx.doi.org/10.1299/jsmermd.2012._1a2-v04_1.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

11

Lee, Y. H., Hyun Min Kim, Kwon Yong Lee, Jae Hoon Lee, S. H. Ahn et M. Y. Koh. « Preparation of a Bioactive Functionally Graded Ceramic-Polymer Hybrid ». Key Engineering Materials 284-286 (avril 2005) : 753–56. http://dx.doi.org/10.4028/www.scientific.net/kem.284-286.753.

Texte intégral

Résumé :

A ceramic-polymer nano-hybrid, in which the bioactive silicate surface is nano-hybridized with flexible silicone bulk, was synthesized in the tetraethoxysilane (TEOS)-polydimethylsiloxane (PDMS) sol-gel system. Different solutions for surface silicate and bulk silicone, whose component ratio of SiO2: PDMS were respectively 100: 0 and 50: 50, were subjected to lamination and delayed polymerization and condensation process, producing a large transparent crack-free monolithic bulk. Characterizations at near-surface cross-section of the hybrid bulk revealed typical bioactive silicate structure with no distinct interface with the interior, indicating possibility of a novel bioactive nano-composite with enhanced physical and biological functions.

Styles APA, Harvard, Vancouver, ISO, etc.

12

Zhang, Shu Hua, Ying Jun Wang, Kun Wei et Xu Dong Wang. « Preparation of Hydroxyapatite/Poly(ε-caprolactone) Hybrid Microspheres for Drug Release System ». Key Engineering Materials 330-332 (février 2007) : 1045–48. http://dx.doi.org/10.4028/www.scientific.net/kem.330-332.1045.

Texte intégral

Résumé :

Hydroxyapatite(HA) nanoparticles with hydrophobic surface have been synthesized using mono-alkyl phosphate (MAP) as modifier by hydrothermal synthesis method. The drug-loaded nano-HA/ Poly(ε-caprolactone)（PCL）composite microspheres and drug-load PCL microspheres were fabricated by an S/O/W emulsion solvent evaporation method. The microspheres morphology was investigated by scanning electron microscopy (SEM). Drug distribution in microsphere matrix was studied by confocal laser scanning microscope (CLSM). The results showed that the drug distributed evenly in the drug-HA-PCL microspheres, but only around the surface of the drug-PCL microspheres. The drug release profile showed that the nano-HA/PCL hybrid microspheres had low initial burst and could release continually for 90 days. This kind of hybrid microspheres can be used as a promising long-term drug delivery system in the bone.

Styles APA, Harvard, Vancouver, ISO, etc.

13

Aversa, Raffaella, Relly Victoria Virgil Petrescu, Antonio Apicella et Florian Ion Tiberiu Petrescu. « A nanodiamond for structural biomimetic scaffolds ». Engineering review 39, n^o 1 (2019) : 81–89. http://dx.doi.org/10.30765/er.39.1.9.

Texte intégral

Résumé :

Bio-mechanically active scaffolds for tissue engineering combining hydrophilic polymeric matrix and nano-diamond fillers properties are presented and discussed in this paper. The resulting scaffolding materials revealed remarkable mechanical and biological properties to be exploited in advanced biomedical applications. The novel hybrid material is based on 2 and 5 volume % of detonation nano-diamond particles in a hydrophilic poly-(hydroxyl-ethylmethacrylate) matrix. According to its mechanical and biological properties, the nanocomposite shows a hybrid nature. The base analytical procedures for the preparation of the hybrid nanocomposites and some preliminary mechanical characteristics are presented. The proposed hybrid system has been considered for potential biomimetic, osteoconductive and osteoinductive scaffolds application in bio-mechanically active bone scaffolds for osteoblast and stem cell differentiation and growth. These more rigid hybrid nano-composites are predicted to possess improved mechanical strength overcoming the mechanical weaknesses of traditional hydrogels clinically utilized for bone regeneration.

Styles APA, Harvard, Vancouver, ISO, etc.

14

Cabe, Adam C., et Shamik Das. « Performance simulation and analysis of a CMOS/nano hybrid nanoprocessor system ». Nanotechnology 20, n^o 16 (31 mars 2009) : 165203. http://dx.doi.org/10.1088/0957-4484/20/16/165203.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

15

Zheng, Wenwei, Heather C. Chiamori, Gang Logan Liu, Liwei Lin et Fanqing Frank Chen. « Nanofabricated plasmonic nano-bio hybrid structures in biomedical detection ». Nanotechnology Reviews 1, n^o 3 (1 juin 2012) : 213–33. http://dx.doi.org/10.1515/ntrev-2011-0008.

Texte intégral

Résumé :

AbstractOur study of biological systems increasingly depends on our ability to dynamically and quantitatively measure the molecular processes with high sensitivity, speed, flexibility, multiplexity, throughput, and reproducibility, usually within the context of a complex biological and chemical mixture of tiny amount. To address these major challenges, plasmon-resonant nanostructure biomolecule hybrids (nano-bio hybrids), so-called plasmonic nanobiosensors, are being developed and viewed as one key breakthrough area for real-time and parallelized biomedical analysis with high sensitivity and selectivity. Hereby, we present a solution of integrated plasmonic system by synergizing three core techniques: (i) nanoplasmonics that manipulates electromagnetic radiation (light) at dielectric-metal interfaces by tuning properties of nanomaterials, (ii) nanofabrication and controlled synthesis of nanomaterials containing noble metals (e.g., Au, Ag, Pt, and Cu), and (iii) bioconjugates techniques that modify surface of nanomaterials with various bioprobes (e.g., antibodies, enzymes, aptamers, and molecular imprint polymers). Applications of these plasmonic nano-bio hybrid structures are also discussed.

Styles APA, Harvard, Vancouver, ISO, etc.

16

Sultan, Khalid Faisal, Mohammed Hassan Jabal et Ameer Abed Jaddoa. « Performance Assessment of the Heat Exchanger with and without a Coating of Hybrid Nanoparticles the User Cooling System in Solar Heating Systems ». International Journal of Heat and Technology 39, n^o 5 (31 octobre 2021) : 1460–68. http://dx.doi.org/10.18280/ijht.390507.

Texte intégral

Résumé :

The aim of this article was to examine the effect of hybrid nano – coating that could potentially impact the enhancement of heat transfer coefficient of distilled water, Reynolds number, and temperature through a swirl heat exchanger, as well as the indicator of the effect Zeta voltage in the coating process. In this experimental work, type of coating used was Aluminum (Al) + Aluminum oxide Al2O3. Outcomes of study showed that the coating of heat exchanger is much better than without coating in improving the thermal properties for liquids passing through heat exchanger as well as increasing the heat exchange through the surface of the exchanger. Results in the article indicated that the use of hybrid nano – structure coating is for inducing the feature of super – hydrophobicity for the surface that touches the fluid included within the heating transferring. Such feature can make an increase in the heating transferring factor and a decreasing in power losing produced via friction. This article indicated that the Zeta voltage analysis is to show the stability of the hybrid nanofluids used in the coating process. The enhanced technology depends upon the concept that exists in nature under the name “Lotus effect” to get super-hydrophobic surfaces. The rate of improvement in heat transfer using hybrid nanoparticles is 33% compared to that without coating condition.

Styles APA, Harvard, Vancouver, ISO, etc.

17

Yang, B. M., C. M. Kao, W. P. Sung, C. P. Yang et T. Y. Chen. « Removing of Nano-Particles from Semiconductor Wastewater Using a Hybrid Treatment System ». Advanced Materials Research 528 (juin 2012) : 71–74. http://dx.doi.org/10.4028/www.scientific.net/amr.528.71.

Texte intégral

Résumé :

Packaging process is one of the main manufacturing steps in the wafer fabrication industries. However, nano-particles would be produced during the packaging process. The produced nano-particle-contained wastewater has characteristics of dark color and high turbidity. Because the nano-particles would usually result in the clogging of the membrane filtration system when it is used for water treatment and reclamation, the application of a pre-treatment system is required to extend the membrane life. The objective of this study was to develop a pre-treatment system for packaging wastewater treatment before membrane system was applied for further water quality improvement. In this laboratory-scale study, a hybrid treatment system containing a chemical coagulation/flocculation followed by ultra-filtration (UF) membrane technology was developed for the wafer fabrication wastewater treatment. The chemical coagulation/flocculation unit was used as the pre-treatment process to improve the efficiency of the following ultra-filtration (UF) membrane system. The packaging wastewater was collected from a wafer fabrication factory and used to evaluate the feasibility of the coagulation/flocculation process on nano-scale particle removal. Results show that approximately 98% of turbidity could be removed at pH 7 when 2.2 mg/L of polyaluminum chloride (PAC) (used as coagulant) and 0.5 mg/L of polyacrylamide (cPAM) (used as flocculant) were added during the coagulation/flocculation process. Results indicate that the coagulation/flocculation is a feasible pre-treatment process for nano-particle removal before UF membrane is applied for further water purification. Results from this study will be helpful in designing a scale-up system for practical applications.

Styles APA, Harvard, Vancouver, ISO, etc.

18

Ka, Ibrahima, Luis F. Gerlein, Ivy M. Asuo, Riad Nechache et Sylvain G. Cloutier. « An ultra-broadband perovskite-PbS quantum dot sensitized carbon nanotube photodetector ». Nanoscale 10, n^o 19 (2018) : 9044–52. http://dx.doi.org/10.1039/c7nr08608c.

Texte intégral

Résumé :

A nano-engineered hybrid material consisting of SWCNTs, PbS-QDs and a halide perovskite is developed for the first time. The PbS-QDs in the hybrid system are found to be a charge generator and a charge-transfer facilitator. The hybrid material integrated into photoconductive devices shows a broad spectral response.

Styles APA, Harvard, Vancouver, ISO, etc.

19

Gao, Yu-Yang, Feng Qiu, Tian-Shu Liu, Jian-Ge Chu, Qing-Long Zhao et Qi-Chuan Jiang. « Effects of Carbon Source on TiC Particles’ Distribution, Tensile, and Abrasive Wear Properties of In Situ TiC/Al-Cu Nanocomposites Prepared in the Al-Ti-C System ». Nanomaterials 8, n^o 8 (10 août 2018) : 610. http://dx.doi.org/10.3390/nano8080610.

Texte intégral

Résumé :

The in situ TiC/Al-Cu nanocomposites were fabricated in the Al-Ti-C reaction systems with various carbon sources by the combined method of combustion synthesis, hot pressing, and hot extrusion. The carbon sources used in this paper were the pure C black, hybrid carbon source (50 wt.% C black + 50 wt.% CNTs) and pure CNTs. The average sizes of nano-TiC particles range from 67 nm to 239 nm. The TiC/Al-Cu nanocomposites fabricated by the hybrid carbon source showed more homogenously distributed nano-TiC particles, higher tensile strength and hardness, and better abrasive wear resistance than those of the nanocomposites fabricated by pure C black and pure CNTs. As the nano-TiC particles content increased, the tensile strength, hardness, and the abrasive wear resistance of the nanocomposites increased. The 30 vol.% TiC/Al-Cu nanocomposite fabricated by the hybrid carbon source showed the highest yield strength (531 MPa), tensile strength (656 MPa), hardness (331.2 HV), and the best abrasive wear resistance.

Styles APA, Harvard, Vancouver, ISO, etc.

20

Pavliuk, M. V., A. M. Cieślak, M. Abdellah, A. Budinská, S. Pullen, K. Sokołowski, D. L. A. Fernandes et al. « Hydrogen evolution with nanoengineered ZnO interfaces decorated using a beetroot extract and a hydrogenase mimic ». Sustainable Energy & ; Fuels 1, n^o 1 (2017) : 69–73. http://dx.doi.org/10.1039/c6se00066e.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

21

Zhang, Hongyu, Yanji Zheng, Zhi-Ming Yu, Xiaoyong Hu et Cuicui Lu. « Topological hybrid nanocavity for coupling phase transition ». Journal of Optics 23, n^o 12 (12 novembre 2021) : 124002. http://dx.doi.org/10.1088/2040-8986/ac2fd2.

Texte intégral

Résumé :

Abstract Topological photonic nanocavity provides a robust platform for realizing nano-photonic devices and studying light–matter interaction. Here, a topological photonic-plasmonic hybrid nanocavity, assembling a topological photonic crystal (PhC) nanocavity with a plasmonic nano-antenna, is proposed to have an ultra-high figure of merit Q/V of 1.5 × 10 6 ( λ / n ) − 3 , which is two orders higher than that of the bare topological PhC nanocavity. The single-atom cooperativity parameter is improved by over 60 times due to the large enhancement of Q/V, which makes the coupling between light and a single emitter enter a strong coupling region in topological photonic realm for the first time. Meanwhile, strong coupling and weak coupling can be easily switched in the topological hybrid system by tuning the structure dimension of plasmonic nano-antennas. This work provides a robust platform to control coupling phase transition between light and a single emitter, which has great potential in topological lasers, quantum optics and quantum information.

Styles APA, Harvard, Vancouver, ISO, etc.

22

Ha, Seong-Woo, et Jong Young Kim. « Fabrication and Evaluation of Hybrid Scaffold by Nano-Micro Precision Deposition System ». Transactions of the Korean Society of Mechanical Engineers A 38, n^o 8 (1 août 2014) : 875–80. http://dx.doi.org/10.3795/ksme-a.2014.38.8.875.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

23

Shen, Hui Ling, Hua Liao et Chang Fa Xiao. « Formation Mechanism and Properties of Polyvinylidene Fluoride (PVDF)/Nano-Silica Hybrid Membranes ». Advanced Materials Research 123-125 (août 2010) : 93–96. http://dx.doi.org/10.4028/www.scientific.net/amr.123-125.93.

Texte intégral

Résumé :

By means of the wet phase inversion process, the PVDF/silica (SiO2) hybrid membranes with different content of nano-silica (nano-SiO2) were prepared. It was investigated that the pure water flux and retention based on egg albumin solution for different PVDF hybrid membrane samples. The pure water flux and porosity of PVDF/SiO2 hybrid membranes are enhanced simultaneously with increasing SiO2 content in PVDF composite system. When SiO2 content is around 7.5%, the phase separation rate of casting solution increases to peak value, meanwhile, the retention of hybrid membrane achieves the best effect. The SEM micrographs show that the quantity of finger-like pores of PVDF/SiO2 hybrid membranes decreases and the micropores becomes fine compared to PVDF membrane. The results of DSC indicate that there are almost no effects on the melting point, but enhancement the fusion enthalpy and the crystallinity of PVDF along with increasing the SiO2 content.

Styles APA, Harvard, Vancouver, ISO, etc.

24

Lee, Kang Yong, Y. H. Lee, Hyun Min Kim, J. Kwak et H. K. Lee. « Sol-Gel Synthetic Model of Bi-Structured Bioactive Nano-Hybrids in TEOS-PDMS System ». Key Engineering Materials 309-311 (mai 2006) : 557–60. http://dx.doi.org/10.4028/www.scientific.net/kem.309-311.557.

Texte intégral

Résumé :

Ceramic-polymer bi-structured nano-hybrid, in which the bioactive silicate surface is nano-hybridized with flexible polymeric bulk, was synthesized in the tetraethoxysilane (TEOS)-polydimethylsiloxane (PDMS) sol-gel system. Different solutions for surface and bulk, whose compositions of TEOS: PDMS were respectively fixed 100: 0 and varied from 50: 50 to 20: 80 with various molecular weight (Mw) of PDMS, were subjected to lamination and controlled polymerization and condensation process, producing a large transparent crack-free monolithic bulk. Characterizations at near-surface cross-section of the bi-structured hybrids revealed that typical bioactive silicate was combined with all types of bulk hybrids regardless of their PDMS contents and Mw without distinct interface, indicating possibility of a novel bioactive nano-composite with enhanced physical and biological functions.

Styles APA, Harvard, Vancouver, ISO, etc.

25

Bani, Farhad, Mohsen Adeli, Soodabeh Movahedi et Majid Sadeghizadeh. « Graphene–polyglycerol–curcumin hybrid as a near-infrared (NIR) laser stimuli-responsive system for chemo-photothermal cancer therapy ». RSC Advances 6, n^o 66 (2016) : 61141–49. http://dx.doi.org/10.1039/c6ra05917a.

Texte intégral

Résumé :

The aim of this study is to develop a nano graphene–polyglycerol–curcumin hybrid capable of simultaneous co-delivery of chemotherapeutic drug and cytotoxic heat to cancer cells by near infrared (NIR) laser irradiation.

Styles APA, Harvard, Vancouver, ISO, etc.

26

Rasoolizadeh Shooroki, Abolfazl, Asghar Dashti Rahmatabadi et Mahdi Zare Mehrjardi. « Effect of using hybrid nano lubricant on the thermo-hydrodynamic performance of two lobe journal bearings ». Proceedings of the Institution of Mechanical Engineers, Part J : Journal of Engineering Tribology 236, n^o 6 (19 novembre 2021) : 1167–85. http://dx.doi.org/10.1177/13506501211053089.

Texte intégral

Résumé :

Due to the wide range of journal bearings applications in the industrial machine, significant efforts have been made by tribology researchers to improve their performance in recent years. Designing new bearings geometry and using lubricants with new chemical compounds including additives are the most common solutions proposed to enhance the performance of journal bearing supports. New advancements in nanotechnology and producing the various types of nano particles have provided the chance of upgrading the properties of commercial lubricants. According to the different effect of nano fluids on the performance of mechanical systems corresponding to their composition, today they are used to achieve different goals in lubrication systems. Upgrading the steady state performance parameters including load carrying capacity, attitude angle, surface cooling and effective viscosity are among the expected results of applying nano lubricant in journal bearings. So, in this study the performance of hydrodynamic two lobe journal bearings lubricated with SiO2-multiwall carbon nano tubes /SAE40 hybrid nano fluid is presented considering the thermal effects. For this purpose, the governing Reynolds and energy equations as well as the equation of heat transfer in bearing shell are modified based on the properties of assumed rotor-bearing system. Then the effects of solid volume fraction of nano particles on the performance of two lobe bearings are studied for different amount of bearing noncircularity. The results indicate that upgrading the solid volume fraction of added nano particle to the SAE40 base oil, enhances the lubricant pressure distribution, load carrying capacity, and lubricant effective viscosity. Further, by increasing the solid volume fraction, the attitude angle and temperature of lubricant and rotor-bearing surfaces experience a decreasing trend. Generally, it's obvious from the results that choosing the appropriate solid volume fraction of SiO2-multiwall carbon nano tubes in hybrid nano oil composition, especially for high value of preload factor, can improve the performance of two lobe bearings.

Styles APA, Harvard, Vancouver, ISO, etc.

27

Sun, Chuang, et Jize Yan. « A hybrid method to calculate optical torque : Application to a nano-dumbbell trapped by a metalens ». AIP Advances 12, n^o 7 (1 juillet 2022) : 075024. http://dx.doi.org/10.1063/5.0094665.

Texte intégral

Résumé :

The hyper-fast rotation frequency realized in an optical levitation system provides an essential platform for various applications. Benefiting from the development of integrated photonics, optically trapping and manipulating a micro-particle via a metalens has been a significant development trend. The metalens’ powerful and flexible controlling ability of the optical field opens the door to tailoring optical trapping potential. However, the existing methods are difficult to compute optical forces and torques on a non-spherical particle trapped by a metalens-based trapping system, especially when the trapping potential is tailored by a delicately designed metalens. Therefore, a hybrid method by combining the finite difference in time-domain and discrete dipole approximation method is proposed in this paper to realize this goal. The relative error of this method is verified to be below 10%. Based on this hybrid method, the fractional vortex field is found in a metalens-based trapping system for the first time. Then, the optical torque’s dependency on a nano-dumbbell’s geometrical parameters and spatial orientation angles are studied. It is found that there is a torque driving the nano-dumbbell to rotate about the optical axis, and the long axis of the nano-dumbbell tends to be aligned to the polarization plane because of the transverse optical torques if the long axis of the nano-dumbbell is not aligned to the optical axis.

Styles APA, Harvard, Vancouver, ISO, etc.

28

Zhu, Bin. « Advanced Hybrid Ion Conducting Ceramic Composites and Applications in New Fuel Cell Generation ». Key Engineering Materials 280-283 (février 2007) : 413–18. http://dx.doi.org/10.4028/www.scientific.net/kem.280-283.413.

Texte intégral

Résumé :

Our developments on ceramic composite conductors have experienced about 15 years from the oxyacid-salts oxide proton-based conductors, non-oxide containment salts, the ceria-based composite electrolytes, hybrid proton and oxygen ion conductors and nano-composites. A special emphasis is paid to new functional nano-composites based on hybrid proton and oxygen ion conductors that have demonstrated advanced properties and fuel cell applications, e.g., excellent ionic conductivity of 0.01 to 1 Scm-1 and performances of 200 - 1000 mWcm-2 for temperatures achieved for fuel cells between 400 and 700°C. Some proton and oxygen ion conducting mechanisms in the materials are reviewed and discussed. The hybrid ion conduction and dual electrode reactions and processes create a new generation fuel cell system.

Styles APA, Harvard, Vancouver, ISO, etc.

29

Algarni, Mohammed, Mashhour A. Alazwari et Mohammad Reza Safaei. « Optimization of Nano-Additive Characteristics to Improve the Efficiency of a Shell and Tube Thermal Energy Storage System Using a Hybrid Procedure : DOE, ANN, MCDM, MOO, and CFD Modeling ». Mathematics 9, n^o 24 (14 décembre 2021) : 3235. http://dx.doi.org/10.3390/math9243235.

Texte intégral

Résumé :

Using nano-enhanced phase change material (NePCM) rather than pure PCM significantly affects the melting/solidification duration and the stored energy, which are two critical design parameters for latent heat thermal energy storage (LHTES) systems. The present article employs a hybrid procedure based on the design of experiments (DOE), computational fluid dynamics (CFD), artificial neural networks (ANNs), multi-objective optimization (MOO), and multi-criteria decision making (MCDM) to optimize the properties of nano-additives dispersed in a shell and tube LHTES system containing paraffin wax as a phase change material (PCM). Four important properties of nano-additives were considered as optimization variables: volume fraction and thermophysical properties, precisely, specific heat, density, and thermal conductivity. The primary objective was to simultaneously reduce the melting duration and increase the total stored energy. To this end, a five-step hybrid optimization process is presented in this paper. In the first step, the DOE technique is used to design the required simulations for the optimal search of the design space. The second step simulates the melting process through a CFD approach. The third step, which utilizes ANNs, presents polynomial models for objective functions in terms of optimization variables. MOO is used in the fourth step to generate a set of optimal Pareto points. Finally, in the fifth step, selected optimal points with various features are provided using various MCDM methods. The results indicate that nearly 97% of the Pareto points in the considered shell and tube LHTES system had a nano-additive thermal conductivity greater than 180 Wm−1K−1. Furthermore, the density of nano-additives was observed to be greater than 9950 kgm−3 for approximately 86% of the optimal solutions. Additionally, approximately 95% of optimal points had a nano-additive specific heat of greater than 795 Jkg−1K−1.

Styles APA, Harvard, Vancouver, ISO, etc.

30

Park, Jihyeon, Seungju Jo, Youngsu Kim, Shakir Zaman et Daewon Kim. « Electrospun Nanofiber Covered Polystyrene Micro-Nano Hybrid Structures for Triboelectric Nanogenerator and Supercapacitor ». Micromachines 13, n^o 3 (26 février 2022) : 380. http://dx.doi.org/10.3390/mi13030380.

Texte intégral

Résumé :

Recently, tremendous research on small energy supply devices is gaining popularity with the immerging Internet of Things (IoT) technologies. Especially, energy conversion and storage devices can provide opportunities for small electronics. In this research, a micro-nano structured design of electrodes is newly developed for high performing hybrid energy systems with the improved effective surface area. Further, it could be simply fabricated through two-steps synthesis of electrospinning and glass transition of a novel polystyrene (PS) substrate. Herein, the electro-spun nanofiber of polyacrylonitrile (PAN) and Nylon 66 (Nylon) are applied to the dielectric layer of a triboelectric generator (TENG), while the PAN and polyaniline (PANI) composites is utilized as an electroactive material of supercapacitor (SC). As a result, the self-charging power system is successfully integrated with the wrinkled PAN/PS (W-PAN/PS@PANI)-SC and W-TENG by using a rectifier. According to the fabricated hybrid energy systems, the electrical energy produced by W-TENG can be successfully stored into as-fabricated W-PAN/PS@PANI-SC and can also turn on a commercial green LED with the stored energy. Therefore, the micro-nano structured electrode designed for hybrid energy systems can contribute to improve the energy conversion and storage performance of various electronic devices.

Styles APA, Harvard, Vancouver, ISO, etc.

31

Dogantzis, Nicholas P., Gregory K. Hodgson et Stefania Impellizzeri. « Optical writing and single molecule reading of photoactivatable and silver nanoparticle-enhanced fluorescence ». Nanoscale Advances 2, n^o 5 (2020) : 1956–66. http://dx.doi.org/10.1039/d0na00049c.

Texte intégral

Résumé :

We present a hybrid nano-molecular system for optically activated, silver nanoparticle enhanced fluorescence in solution and in thin-polymer films, alongside single molecule level insights into the metal-enhanced fluorescence mechanism.

Styles APA, Harvard, Vancouver, ISO, etc.

32

Nguyen, Thinh Luong The, Alba Gascón Nicolás, Tomas Edvinsson, Jie Meng, Kaibo Zheng, Mohamed Abdellah et Jacinto Sá. « Molecular Linking Selectivity on Self-Assembled Metal-Semiconductor Nano-Hybrid Systems ». Nanomaterials 10, n^o 7 (15 juillet 2020) : 1378. http://dx.doi.org/10.3390/nano10071378.

Texte intégral

Résumé :

Plasmonics nanoparticles gained prominence in the last decade in fields of photonics, solar energy conversion and catalysis. It has been shown that anchoring the plasmonics nanoparticles on semiconductors via a molecular linker reduces band bending and increases hot carriers’ lifetime, which is essential for the development of efficient photovoltaic devices and photocatalytic systems. Aminobenzoic acid is a commonly used linker to connect the plasmonic metal to an oxide-based semiconductor. The coordination to the oxide was established to occur via the carboxylic functional group, however, it remains unclear what type of coordination that is established with the metal site. Herein, it is demonstrated that metal is covalently bonded to the linker via the amino group, as supported by Surface-Enhanced Resonant Raman and infrared spectroscopies. The covalent linkage increases significantly the amount of silver grafted, resulting in an improvement of the system catalytic proficiency in the 4-nitrophenol (4-NP) photoreduction.

Styles APA, Harvard, Vancouver, ISO, etc.

33

Ashraf, Asifa, Zhiyue Zhang, Tareq Saeed, Hussan Zeb et Taj Munir. « Convective Heat Transfer Analysis for Aluminum Oxide (Al2O3)- and Ferro (Fe3O4)-Based Nano-Fluid over a Curved Stretching Sheet ». Nanomaterials 12, n^o 7 (30 mars 2022) : 1152. http://dx.doi.org/10.3390/nano12071152.

Texte intégral

Résumé :

In this work, the combined effects of velocity slip and convective heat boundary conditions on a hybrid nano-fluid over a nonlinear curved stretching surface were considered. Two kinds of fluids, namely, hybrid nano-fluid and aluminum oxide (Al2O3)- and iron oxide (Fe3O4)-based nano-fluid, were also taken into account. We transformed the governing model into a nonlinear system of ordinary differential equations (ODEs). For this we used the similarity transformation method. The solution of the transformed ODE system was computed via a higher-order numerical approximation scheme known as the shooting method with the Runge–Kutta method of order four (RK-4). It is noticed that the fluid velocity was reduced for the magnetic parameter, curvature parameter, and slip parameters, while the temperature declined with higher values of the magnetic parameter, Prandtl number, and convective heat transfer. Furthermore, the physical quantities of engineering interest, i.e., the behavior of the skin fraction and the Nusselt number, are presented. These behaviors are also illustrated graphically along with the numerical values in a comparison with previous work in numerical tabular form.

Styles APA, Harvard, Vancouver, ISO, etc.

34

Upadhyay, Praveenkumar Ramprakash, Prashant Gautam et Vivek Srivastava. « Magnetic Organic-Inorganic Hybrid Nano System Anchored Platinum Nanoparticles for Carbon Sequestration Reaction ». Letters in Organic Chemistry 17, n^o 1 (12 décembre 2019) : 73–83. http://dx.doi.org/10.2174/1570178616666190228141754.

Texte intégral

Résumé :

new Pt metal based nano-catalytic system was developed using organic-inorganic magnetic framework followed by the user-friendly protocol in good yield. XRD, FTIR, TEM, BET, ICP-OES and solid-state NMR techniques were used to characterize our developed catalytic system. The wellcharacterized ionic liquid bridged-silica supported magnetic Pt nanoparticles were utilized for the selective hydrogenation of carbon dioxide under high-pressure reaction condition (with and without ionic liquid medium). Most promising results were obtained while using the catalytic system (Pt-MagNP@ILSiO2) in 1,3-di (N, N-dimethylaminoethyl)-2-methylimidazolium nonafluorobutanesulfonate ([DAMI] [CF3CF2CF2CF2SO3]) task-specific ionic liquid medium. This TSIL not only provided a high degree of CO2 absorption during the reaction but also enhances the selectivity and the recyclability of the catalytic system up to 8 runs. No sign of Pt metal leaching was recorded during the recyclability test which confirmed the stability of this catalytic system under high-pressure reaction condition.

Styles APA, Harvard, Vancouver, ISO, etc.

35

Wang, Min, Wensong Hao, Lei Zhang, Yanong Zhu, Kun Chen, Shuai Ma, Xinfeng Cheng et Jinsheng Zhao. « Lipid-polymer nano core-shell type hybrid system for colon specific drug delivery ». Journal of Drug Delivery Science and Technology 63 (juin 2021) : 102540. http://dx.doi.org/10.1016/j.jddst.2021.102540.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

36

Chakraborty, Rajat Subhra, et Swarup Bhunia. « A study of asynchronous design methodology for robust CMOS-nano hybrid system design ». ACM Journal on Emerging Technologies in Computing Systems 5, n^o 3 (août 2009) : 1–22. http://dx.doi.org/10.1145/1568485.1568486.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

37

Lee, K. Y., Y. H. Lee, H. M. Kim, M. Y. Koh, S. H. Ahn et H. K. Lee. « Synthetic model of a bioactive functionally graded nano-hybrid in silica–polydimethylsiloxane system ». Current Applied Physics 5, n^o 5 (juillet 2005) : 453–57. http://dx.doi.org/10.1016/j.cap.2005.01.009.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

38

Salkhord, Sina, et Hedayatollah Sadeghi Ghari. « Synergistic reinforcement of NBR by hybrid filler system including organoclay and nano-CaCO3 ». Journal of Applied Polymer Science 132, n^o 44 (12 août 2015) : n/a. http://dx.doi.org/10.1002/app.42744.

Texte intégral

Styles APA, Harvard, Vancouver, ISO, etc.

39

Han, W. S., et S. H. Rhi. « Thermal characteristics of grooved heat pipe with hybrid nanofluids ». Thermal Science 15, n^o 1 (2011) : 195–206. http://dx.doi.org/10.2298/tsci100209056h.

Texte intégral

Résumé :

In the present study, the specially designed grooved heat pipe charged with nanofluids was investigated in terms of various parameters such as heat transfer rate(50-300 W with 50 W interval), volume concentration(0.005%, 0.05%, 0.1%, and hybrid combinations), inclination(5?, 45?, 90?), cooling water temperature (1?C, 10?C, and 20?C), surface state, transient state and so on. Hybrid nanofluids with different volume concentration ratios with Ag-H2O and Al2O3-H2O were used as working fluids on a grooved heat pipe(GHP). Comparing with the pure water system, nanofluidic and hybrid nanofluidic system shows greater overall thermal resistance with increasing nano-particle concentration. Also hybrid nanofluids make the system deteriorate in terms of thermal resistance. The post nanofluid experimental data regarding GHP show that the heat transfer performance is similar to the results of nanofluid system. The thermal performance of a grooved heat pipe with nanofluids and hybrid nanofluids were varied with driving parameters but they led to worse system performance.

Styles APA, Harvard, Vancouver, ISO, etc.

40

Hamerschmitt, Raphael Meneghetti, Paulo Henrique Tomazinho, Kaíke Lessa Camporês, Carla Castiglia Gonzaga, Leonardo Fernandes da Cunha et Gisele Maria Correr. « Surface topography and bacterial adhesion of CAD/CAM resin based materials after application of different surface finishing techniques ». Brazilian Journal of Oral Sciences 17 (5 juin 2018) : 1–11. http://dx.doi.org/10.20396/bjos.v17i0.8652650.

Texte intégral

Résumé :

Aim: This study evaluated the surface topography and bacterial adhesion of a hybrid ceramic and a nano ceramic resin composite after different surface finishes. Methods: Hybrid ceramic (Vita Enamic, VITA - EN) and nano ceramic resin composite (Lava Ultimate, 3M/ESPE - LV) blocks of 12 x 14 x 18 mm were cut into 1 mm slices. Each slice was divided into four specimens (6 x 7 mm) that were randomly allocated into 4 groups (n=8) according to the surface finishing: CTL - without surface finish (control); DB - wear with a diamond bur; VT - polishing system for hybrid ceramic (VITA); and DD - polishing system for ceramics (Dedeco). The specimens were analyzed regarding surface roughness parameters (Ra, Rz, Rq), sterilized and subjected to bacterial adhesion. Representative specimens from each group were observed by SEM and Confocal Laser Scanning Microscopy. Data were submitted to two-way ANOVA and Tukey's test (α=0.05). Results: EN had lower surface roughness and bacterial adhesion than LV (p<0.05), regardless of the surface finish. The highest values for all roughness parameters was observed in LVDB group, differing from the other groups, which were not significantly different. Smaller bacterial adhesion values (CFU/mL) were observed for ENDD and ENVT, which differed significantly from the other groups, except ENCTL. For LV groups there was no significant difference between the different surface finishes (p>0.05). The type of material and surface finish system significantly interfered with surface roughness parameters and bacterial adhesion. The hybrid ceramic performed better after polishing than the nano-ceramic resin. Conclusion: An adequate finishing/polishing technique should always be performed after any kind of adjustment to indirect restorations made with these materials tested.

Styles APA, Harvard, Vancouver, ISO, etc.

41

Selimefendigil, Fatih, Mondher Hamzaoui, Abdelkarim Aydi, Badr M. Alshammari et Lioua Kolsi. « Hybrid Nano-Jet Impingement Cooling of Double Rotating Cylinders Immersed in Porous Medium ». Mathematics 11, n^o 1 (23 décembre 2022) : 51. http://dx.doi.org/10.3390/math11010051.

Texte intégral

Résumé :

A cooling system with impinging jets is used extensively in diverse engineering applications, such as solar panels, electronic equipments, battery thermal management, textiles and drying applications. Over the years many methods have been offered to increase the effectiveness of the cooling system design by different techniques. In one of the available methods, nano-jets are used to achieve a higher local and average heat transfer coefficient. In this study, convective cooling of double rotating cylinders embedded in a porous medium is analyzed by using hybrid nano-jets. A finite element formulation of the thermo-fluid system is considered, while impacts of Reynolds number, rotational speed of the double cylinders, permeability of the porous medium and distance between the cylinders on the cooling performance are numerically assessed. Hybrid and pure fluid performances in the jet cooling system are compared. It is observed that the cooling performance improves when the rotating speed of the cylinder, permeability of the medium and jet Reynolds number are increased. The heat transfer behavior when varying the distance between the cylinders is different for the first and second cylinder. Higher thermal performances are achieved when hybrid nanofluid with higher nanoparticle loading is used. An optimization algorithm is used for finding the optimum distance and rotational speeds of the cylinders for obtaining an improved cooling performance, while results show higher effectiveness as compared to a parametric study. The outcomes of the present work are useful for the thermal design and optimization of the cooling system design for configurations encountered in electronic cooling, energy extraction and waste heat recovery.

Styles APA, Harvard, Vancouver, ISO, etc.

42

Alanazi, Meznah M., Awatif A. Hendi, Qadeer Raza, Muhammad Abdul Rehman, Muhammad Zubair Akbar Qureshi, Bagh Ali et Nehad Ali Shah. « Numerical Computation of Hybrid Morphologies of Nanoparticles on the Dynamic of Nanofluid : The Case of Blood-Based Fluid ». Axioms 12, n^o 2 (6 février 2023) : 163. http://dx.doi.org/10.3390/axioms12020163.

Texte intégral

Résumé :

The movement of biological fluids in the human body is a premium field of interest to overcome growing biomedical challenges. Blood behavior shows different behavior in capillaries, veins, and arteries during circulation. In this paper, a new mathematical relation for the nano-layer of biological fluids flows with the effect of TiO2 and Ag hybrid nanoparticles was developed. Further, we explain the engineering phenomena of biological fluids and the role of hybrid nanoparticles in the blood vessel system. The improvement of drug delivery systems by using low seepage Reynolds number was associated with expansion/contraction and was discussed in detail through the rectangular domain. Using similarity transformation, the governing equations were converted into non-linear ordinary differential equations, and the mathematical problem was solved by employing the numerical shooting method. Plots of momentum, temperature, skin friction coefficient, as well as the Nusselt number on different non-dimensionless parameters are displayed via lower/upper porous walls of the channel. It was analyzed that the walls of the channel showed different results on magnetized physical parameters. Values of thermophoresis and the Brownian motion flow of the heat transfer rate gradually increased on the upper wall and decreased on the lower wall of the channel. The important thing is that the hybrid nanoparticles, rather than nano, were more useful for improving thermal conductivity, heat transfer rate, and the nano-layer.

Styles APA, Harvard, Vancouver, ISO, etc.

43

Rajhi, Ali A. « Mechanical Characterization of Hybrid Nano-Filled Glass/Epoxy Composites ». Polymers 14, n^o 22 (11 novembre 2022) : 4852. http://dx.doi.org/10.3390/polym14224852.

Texte intégral

Résumé :

Fiber-reinforced polymer (FRP) composite materials are very versatile in use because of their high specific stiffness and high specific strength characteristics. The main limitation of this material is its brittle nature (mainly due to the low stiffness and low fracture toughness of resin) that leads to reduced properties that are matrix dominated, including impact strength, compressive strength, in-plane shear, fracture toughness, and interlaminar strength. One method of overcoming these limitations is using nanoparticles as fillers in an FRP composite. Thereby, this present paper is focused on studying the effect of nanofillers added to glass/epoxy composite materials on mechanical behavior. Multiwall carbon nanotubes (MWCNTs), nano-silica (NS), and nano-iron oxide (NFe) are the nanofillers selected, as they can react with the resin system in the present-case epoxy to contribute a significant improvement to the polymer cross-linking web. Glass/epoxy composites are made with four layers of unidirectional E-glass fiber modified by nanoparticles with four different weight percentages (0.1%, 0.2%, 0.5%, and 1.0%). For reference, a sample without nanoparticles was made. The mechanical characterizations of these samples were completed under tensile, compressive, flexural, and impact loading. To understand the failure mechanism, an SEM analysis was also completed on the fractured surface.

Styles APA, Harvard, Vancouver, ISO, etc.

44

Feng, Lei, Peng Zhao, Tongdan Chen et Minghai Jing. « Comparative Study of Octavinyl Oligomeric Sesquisiloxane Nanomaterial-Modified Asphalt Using Molecular Dynamics Method ». Polymers 14, n^o 21 (28 octobre 2022) : 4577. http://dx.doi.org/10.3390/polym14214577.

Texte intégral

Résumé :

This paper mainly studies the compatibility and properties of octavinyl oligomeric silsesquioxane nanomaterial (nano-OvPOSS)-modified asphalt, in comparison with those of traditional zinc oxide nanomaterial (nano-ZnO) and silica nanomaterial (nano-SiO2), through the method of molecular dynamics simulation. Nano-OvPOSS, an organic–inorganic nano-hybrid material, is studied for the first time in the application of asphalt modification. By studying different sizes and types of nanomaterials, this paper elucidates the superiority of nano-OvPOSS as an asphalt modifier owing to the unique microstructure of eight organic groups of its inorganic framework. According to the results, nano-OvPOSS does not aggregate in the modified asphalt system and displays the best compatibility with asphalt when compared with nano-SiO2 and nano-ZnO. Moreover, nano-OvPOSS exhibits the most favorable compatibility with resinous oil out of the four asphalt components. The size of nano-OvPOSS determines its compatibility with asphalt. The smaller the particle size of nano-OvPOSS, the better its compatibility with asphalt. Therefore, out of all the four sizes of nano-OvPOSS (4.4 Å, 7 Å, 10 Å, and 20 Å) adopted in this study, the 4.4 Å nano-OvPOSS exhibits the best compatibility with asphalt. Additionally, compared with nano-SiO2 and nano-ZnO, nano-OvPOSS is capable of attracting more asphalt molecules around it so that it reduces the largest amount of ratio of free volume (RFV) of matrix asphalt, which can be reduced by 9.4%. Besides these characteristics, the addition of nano-OvPOSS into the matrix asphalt contributes to higher heat capacity, bulk modulus, and shear modulus of the asphalt system, which were increased by 14.3%, 74.7%, and 80.2%, respectively, thereby guaranteeing a more desirable temperature stability and deformation resistance in the asphalt system. Accordingly, nano-OvPOSS can be employed as a viable asphalt modifier to ensure a well-rounded performance of modified asphalt.

Styles APA, Harvard, Vancouver, ISO, etc.

45

Ghinis, Jamison, et Clifford Leslie. « A Meta Study on the Implications of Thermoelectric Generation on Hybrid Photovoltaic Systems ». PAM Review Energy Science & ; Technology 5 (31 mai 2018) : 104–18. http://dx.doi.org/10.5130/pamr.v5i0.1499.

Texte intégral

Résumé :

The focus of this paper is a meta-study analysis of the efficiency of hybrid thermal and photovoltaic (PV) energy systems and how various materials and specific temperature ranges for thermoelectric (TE) generation can increase their efficiency. This meta-study focuses on papers obtained from ACS NANO, Scopus, Web of Science and Nature which discuss the theoretical and practical implementation of TE and PV systems, with various hybrid systems being considered. Analysed is the Figure of Merit from various hybrid TE and PV integrated systems, the effect of energy efficiency and power generation on different PV system temperatures, and output over area. The total efficiency of the hybrid system is found to have a considerable effect in all papers analysed, with an increase of 5 to 10 percent efficiency in energy output due to the thermoelectric generator (TEG) section, with this maximum efficiency occurring approximately in a 25 kelvin range [1]. A maximum output of 125 W peaks can be maintained for systems efficiently over 600 W/m2 modules, this is an up to 5 percent total efficiency increase in power output in the previously discussed 25 kelvin range [2]. The papers proposed demonstrate the more efficient implementations, potential for further study and implementation of hybrid systems within specific temperature and operating conditions.

Styles APA, Harvard, Vancouver, ISO, etc.

46

Ali Khan, Kunwar Faisal, Zafar Alam et Syed Mohd Yahya. « Experimental Investigation Of Potentiality Of Nano fluids In Enhancing The Performance Of Hybrid Pvt System ». Journal of University of Shanghai for Science and Technology 23, n^o 05 (7 mai 2021) : 77–89. http://dx.doi.org/10.51201/jusst/21/04252.

Texte intégral

Résumé :

The power from sun caught by earth is nearby 1.8 × 1011MW which is obtained by utilizing sun’s energy by photovoltaic cells appears to be a good substitute then the conventional fuels. The efficiency of the system declines due to the heat confined in photovoltaic cells throughout the operation [1]. Enhancing the efficiency of Sun power generation by engaging nanofluids in PV/T systems is achieved by recent improvement in the nanotechnology field. In our work Nano fluids are employed as coolants to lower the PV panel temperatures and thus the system efficiency increases. This study comprehensively analyses the effectiveness of Zinc nanoparticles in different base fluids i.e. water, water (75%) & ethylene glycol (25%) and water (75%) & propylene glycol (25%) to enhance the electrical and thermal efficiency of the PV/T system. Other parameters like flow rate, concentration of nanoparticles by volume and sonication time are kept constant throughout the experiment. The experiments were performed on an indoor setup and to replicate the solar irradiance a solar simulator was engaged as per previous year’s metrological data. It is perceived that the extreme change in electrical efficiency is 2.6% and maximum change in thermal efficiency observed is 31% as compared to conventional system.

Styles APA, Harvard, Vancouver, ISO, etc.

47

Khan, Muhammad Sohail, Sun Mei, Shabnam, Unai Fernandez-Gamiz, Samad Noeiaghdam, Said Anwar Shah et Aamir Khan. « Numerical Analysis of Unsteady Hybrid Nanofluid Flow Comprising CNTs-Ferrousoxide/Water with Variable Magnetic Field ». Nanomaterials 12, n^o 2 (6 janvier 2022) : 180. http://dx.doi.org/10.3390/nano12020180.

Texte intégral

Résumé :

The introduction of hybrid nanofluids is an important concept in various engineering and industrial applications. It is used prominently in various engineering applications, such as wider absorption range, low-pressure drop, generator cooling, nuclear system cooling, good thermal conductivity, heat exchangers, etc. In this article, the impact of variable magnetic field on the flow field of hybrid nano-fluid for the improvement of heat and mass transmission is investigated. The main objective of this study is to see the impact of hybrid nano-fluid (ferrous oxide water and carbon nanotubes) CNTs-Fe3O4, H2O between two parallel plates with variable magnetic field. The governing momentum equation, energy equation, and the magnetic field equation have been reduced into a system of highly nonlinear ODEs by using similarity transformations. The parametric continuation method (PCM) has been utilized for the solution of the derived system of equations. For the validity of the model by PCM, the proposed model has also been solved via the shooting method. The numerical outcomes of the important flow properties such as velocity profile, temperature profile and variable magnetic field for the hybrid nanofluid are displayed quantitatively through various graphs and tables. It has been noticed that the increase in the volume friction of the nano-material significantly fluctuates the velocity profile near the channel wall due to an increase in the fluid density. In addition, single-wall nanotubes have a greater effect on temperature than multi-wall carbon nanotubes. Statistical analysis shows that the thermal flow rate of (Fe3O4-SWCNTs-water) and (Fe3O4-MWCNTs-water) rises from 1.6336 percent to 6.9519 percent, and 1.7614 percent to 7.4413 percent, respectively when the volume fraction of nanomaterial increases from 0.01 to 0.04. Furthermore, the body force accelerates near the wall of boundary layer because Lorentz force is small near the squeezing plate, as the current being almost parallel to the magnetic field.

Styles APA, Harvard, Vancouver, ISO, etc.

48

Kim, Jeong-Hwan, Masanari Umemura, Haruki Eguchi et Yoshihiro Ishikawa. « Methotrexate-Transferrin-Functionalized Fe(Salen)-Polypyrrole Nanocomposites for Targeted Photo-/Magneto-Thermal Cancer Treatments ». Journal of Composites Science 6, n^o 5 (8 mai 2022) : 136. http://dx.doi.org/10.3390/jcs6050136.

Texte intégral

Résumé :

Designing multi-modal topical drug delivery nanocarriers using nano-hybrid particles has received significant interest in targeted cancer therapy. In this study, magnetic Fe(salen)-conducting copolymer nanocomposites based on our previous iron salt-free synthesis method are surface-functionalized with methotrexate and transferrin proteins. The nano-hybrids show near-infrared-/magnetic field-responsive hyperthermal activity in vitro, which can be extraordinarily useful in magnetically guidable local cancer targeting as a versatile multi-modal therapeutic drug delivery system.

Styles APA, Harvard, Vancouver, ISO, etc.

49

Yaw, Chong Tak, S. P. Koh, M. Sandhya, K. Kadirgama, Sieh Kiong Tiong, D. Ramasamy, K. Sudhakar, M. Samykano, F. Benedict et Chung Hong Tan. « Heat Transfer Enhancement by Hybrid Nano Additives—Graphene Nanoplatelets/Cellulose Nanocrystal for the Automobile Cooling System (Radiator) ». Nanomaterials 13, n^o 5 (22 février 2023) : 808. http://dx.doi.org/10.3390/nano13050808.

Texte intégral

Résumé :

A radiator is used to remove a portion of the heat generated by a vehicle engine. It is challenging to efficiently maintain the heat transfer in an automotive cooling system even though both internal and external systems need enough time to keep pace with catching up with evolving engine technology advancements. The effectiveness of a unique hybrid’s heat transfer nanofluid was investigated in this study. The hybrid nanofluid was mainly composed of graphene nanoplatelets (GnP), and cellulose nanocrystals (CNC) nanoparticles suspended in a 40:60 ratio of distilled water and ethylene glycol. A counterflow radiator equipped with a test rig setup was used to evaluate the hybrid nano fluid’s thermal performance. According to the findings, the proposed GNP/CNC hybrid nanofluid performs better in relation to improving the efficiency of heat transfer of a vehicle radiator. The suggested hybrid nanofluid enhanced convective heat transfer coefficient by 51.91%, overall heat transfer coefficient by 46.72%, and pressure drop by 34.06% with respect to distilled water base fluid. Additionally, the radiator could reach a better CHTC with 0.01% hybrid nanofluid in the optimized radiator tube by the size reduction assessment using computational fluid analysis. In addition to downsizing the radiator tube and increasing cooling capacity over typical coolants, the radiator takes up less space and helps to lower the weight of a vehicle engine. As a result, the suggested unique hybrid graphene nanoplatelets/cellulose nanocrystal-based nanofluids perform better in heat transfer enhancement in automobiles.

Styles APA, Harvard, Vancouver, ISO, etc.

50

Fu, Xuelong, Yubing Hu, Gan Peng et Jie Tao. « Effect of reinforcement content on the density, mechanical and tribological properties of Ti3SiC2/Al2O3 hybrid reinforced copper-matrix pantograph slide ». Science and Engineering of Composite Materials 24, n^o 6 (27 novembre 2017) : 807–15. http://dx.doi.org/10.1515/secm-2015-0290.

Texte intégral

Résumé :

AbstractAs an important part of the pantograph and catenary system, the pantograph slide receives increasing attention from investigators, mainly focused on the interfacial bonding and characteristics, electrical conductivity, and friction and wear characteristics under current-carrying circumstances. In the article, hybrid reinforcements of titanium silicon carbide (Ti3SiC2) and nano-alumina (nano-Al2O3) particles pretreated by electroless plating process were firstly blended with copper powders and then prepressed and vacuum hot pressed to fabricate the hybrid reinforced copper-matrix pantographs (HRCPs). The relative density, mechanical and electrical properties of Ti3SiC2/Al2O3 HRCPs were calculated and measured. The tribological performance of the HRCPs reinforced with 1 wt%~5 wt% of alumina particles and 20 wt%~40 wt% of Ti3SiC2 reinforcements was also analyzed.

Styles APA, Harvard, Vancouver, ISO, etc.

Articles de revues sur le sujet « Hybrid-Nano System »

Créez une référence correcte selon les styles APA, MLA, Chicago, Harvard et plusieurs autres