Thermal Plasma Synthesis of Li2S Nanoparticles for
Inductively-coupled thermal plasma processes were used to produce nanosized Li2S. Prior to the syntheses the feasibility of forming Li2S was first evaluated using FactSage by considering the phase diagrams of sulfur and different lithium precursors in reducing atmospheres Li2O LiOH·H2O Li2CO3 and Li2SO4·H2O all showed promises in producing Li2S nanoparticles as confirmed by experiments.
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1. Introduction
The velocity of thermal plasma jet has influence on the acceleration and stretching of molten silicon particles. Therefore it is supposed that the wire structure is formed effectively at 11 kW with the low viscosity of molten silicon and the high velocity of thermal plasma jet. Figure 8(c) shows silicon nanoparticles as well as silicon nanowires.
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Self-Assembly Techniques for Nanofabrication
Dec 24 2013 · Self-Assembly Techniques for Nanofabrication. Self-assembly is a type of process in which a disordered system with preexisting components forms an organized structure or pattern as a consequence of specific local interactions among its components without any external direction. Self-assembly of nanoparticles and subsequent formation of well
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Computational prediction of niobium-silicide nanopowder
in thermal plasma synthesis Masaya Shigeta Joining and Welding Research Institute Osaka University A growth process of niobium-silicide nanopowder from the precursory binary vapors of niobium and silicon in a thermal plasma environment has been computed using a unique mathematical model as a recent application of supercomputing.
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Nanofabrication by thermal plasma jets From nanoparticles
Nanofabrication by thermal plasma jets From nanoparticles to low-dimensional nanomaterials Thermal plasma jets are flows of partially ionized gases where gas and electron temperatures reach their equilibrium state around 10 000 K and thus provide high fluxes of energy and chemically active species including electrons and ions with their
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Effect of Saturation Pressure Difference on Metal-Silicide
1. Introduction. Thermal plasmas have been used for effectual fabrication of nanopowders composed of nanometer-scale particles .Nanopowders have unique capabilities that differ greatly from those of bulk materials or powders composed of larger particles .Particularly nanopowders composed of metal–silicide nanoparticles are anticipated to be potentially useful materials for extremely
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Scaled Synthesis of Boron Nitride Nanotubes Nanoribbons
Jul 11 2014 · Thermal Plasma Synthesis of Ceramic Nanomaterials. Nanofabrication by thermal plasma jets From nanoparticles to low-dimensional nanomaterials. Journal of Applied Physics 2019 125 (7) Four-Wave-Mixing Approach to In Situ Detection of Nanoparticles
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USB2Method and device to synthesize boron
Methods and apparatus for producing chemical nanostructures having multiple elements such as boron and nitride e.g. boron nitride nanotubes are disclosed. The method comprises creating a plasma jet or plume such as by an arc discharge. The plasma plume is elongated and has a temperature gradient along its length. It extends along its length into a port connector area having ports for
Get PricePlasma Nanoengineering and Nanofabrication
With the recent advances in nanotechnology plasma nanofabrication has become an exciting new niche because plasma-based approaches can deliver unique structures at the nanoscale that cannot be achieved by other techniques and/or in a more economical and environmentally friendly manner.
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Numerical Study of Axial Magnetic Effects on a Turbulent
3D time-dependent simulations are performed using a computational method suitable for thermal plasma flows to capture a turbulent field induced by a thermal plasma jet and steep gradients in nanopowder distributions. A mathematical model with a simple form is developed to describe effectively simultaneous processes of growth and transport of nanopowder in/around a thermal plasma flow.
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Modelling of the in-flight synthesis of TaC nanoparticles
thermal plasma jet A Vorobev1 O Zikanov and P Mohanty The model is applied to the analysis of multi-component co-condensation of TaC nanoparticles within a dc plasma reactor. 1. Introduction Thermal plasma spraying is a popular method for production of thin coatings made of different materials and having diverse
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Plasma-digital nexus plasma nanotechnology for the
Jan 09 2020 · Digital transformation in manufacturing is one of the key megatrends in the development of the global economy and society. Three-dimensional (3D) printing is a transformative digital technology poised to disrupt manufacturing and supply chains across major industries. Here we critically examine relevant insights into current and emerging applications of plasma nanotechnology in printing
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Effect of Saturation Pressure Difference on Metal-Silicide
1. Introduction. Thermal plasmas have been used for effectual fabrication of nanopowders composed of nanometer-scale particles .Nanopowders have unique capabilities that differ greatly from those of bulk materials or powders composed of larger particles .Particularly nanopowders composed of metal–silicide nanoparticles are anticipated to be potentially useful materials for extremely
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Srikumar Ghorui IEEE Xplore Author Details
Srikumar Ghorui was born in India in 1972. He received the M.Sc. degree in physics with specialization in radio physics and electronics from The University of Burdwan Bardhaman India in 1995 the M.Sc. degree from the Training School Bhabha Atomic Research Centre (BARC) Mumbai India in 1997
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Modeling and simulation of a turbulent‐like thermal plasma
Nov 13 2018 · To overcome this shortcoming the thermal plasma has been considered as a promising technique for the efficient fabrication of nanopowders 12. A thermal plasma with very high temperature of approximately 10 000 K can vaporize even materials having a high melting or boiling point 1418.
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Electronic Supplemental Information ensembles using
High-precision nanofabrication technology for metal nanoparticle ensembles using nanotemplate-guided thermal dewetting Yusuke Niimura a Naoto Oonishi a Kyohei Okubo b Loan Le Thi Ngoc c and Edwin T. Carlen ad Corresponding author Edwin T. Carlen ecarlen aichmis a University of Tsukuba Graduate School of Pure and Applied Sciences
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Thermal Flow Characteristics of the Triple Plasma Torch
Abstract Triple dc plasma torch system was used for the synthesis of nanoparticles. Three thermal plasma jets are ejected from each plasma torch and they are merged into a strong single plasma plume. Since the feedstock is injected into the jet merging area this system is suitable for refractory nanoparticle synthesis and enable to high production yield caused by the complete evaporation is
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Growth model of binary alloy nanopowders for thermal
A new model is developed for numerical analysis of the entire growth process of binary alloy nanopowders in thermal plasma synthesis. The model can express any nanopowder profile in the particle size-composition distribution (PSCD). Moreover its numerical solution algorithm is arithmetic and straightforward so that the model is easy to use. By virtue of these features the model effectively
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Synthesis of Silicon Nanoparticles and Nanowires by a
The injected raw powder into thermal plasma was vaporized by high temperature of thermal plasma jet and generating silicon nuclei followed by the production of nanomaterial with rapid quenching. Products were collected from the inner surface of the reaction tube and the chamber cover respectively.
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Growth model of binary alloy nanopowders for thermal
A new model is developed for numerical analysis of the entire growth process of binary alloy nanopowders in thermal plasma synthesis. The model can express any nanopowder profile in the particle size-composition distribution (PSCD). Moreover its numerical solution algorithm is arithmetic and straightforward so that the model is easy to use. By virtue of these features the model effectively
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Bottom-Up Methods for Making Nanotechnology Products
Dec 14 2004 · The main advantage is the nondirective aspect of this technology. Plasma allows a significant decrease in the process temperature compared to the thermal CVD process. CVD is widely used to produce carbon nanotubes. Atomic or Molecular Condensation. This method is used mainly for metal-containing nanoparticles.
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Nanofabrication by thermal plasma jets From nanoparticles
Current fabrication of nanomaterials is facing the following two challenges high selectivity toward specific chemical compositions or morphologies and their scalable production. This usually requires new extreme fabrication conditions beyond the conventional approaches. Thermal plasma jets are flows of partially ionized gases where gas and electron temperatures reach their equilibrium state
Get PriceEnabling nanomaterial nanofabrication and cellular
In tissue engineering nanoparticles are used for delivering therapeutic molecules such as drugs antibiotics growth factors cytokines and other factors that can influence differentiation of stem cells. Magnetic nanoparticles have also been used for manipulating cellular function by using an applied external magnetic field. 152 153
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Nanoparticle Catalyst Preparation Using Pulsed Arc Plasma
plasmas.1-4 Various thermal and cold plasmas including plasma jets DC coronas arcs glow discharges radio frequencies and microwaves have been applied to the generation of ultrafine particles preparation of supported catalysts and/or modification of catalyst . surfaces
Get PriceNanoparticle Catalyst Preparation Using Pulsed Arc Plasma
plasmas.1-4 Various thermal and cold plasmas including plasma jets DC coronas arcs glow discharges radio frequencies and microwaves have been applied to the generation of ultrafine particles preparation of supported catalysts and/or modification of catalyst . surfaces
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ELECTRODE-LESS PLASMA JET SYNTHESIS OF CORE-SHELL
Iron based nanoparticles were synthesised in atmospheric pressure electrode-less microwave plasma jetsurfatron. Using several common admixtures to a main argon gas we controlled the chemical and phase composition of produced nanoparticles. In oxygen containing plasma the product was preferentially formed of fully oxidised Fe 2 O 3
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Numerical Study of Axial Magnetic Effects on a Turbulent
3D time-dependent simulations are performed using a computational method suitable for thermal plasma flows to capture a turbulent field induced by a thermal plasma jet
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Nanomaterials Free Full-Text Effects of Atomization
Suspension plasma spray process involves a series of complex phenomena such as feedstock injection suspension breakup and evaporation and nanoparticles or their agglomerates release into the plasma jet .The solid particles will experience further heating melting
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PLASMA ENABLED NANOFABRICATION AND APPLICATIONSAbout
Plasmas are also ideal for maskless nanostructure fabrication on metals as well as nanomaterial fabrication. During the past decade plasma nanoscience and plasma nanotechnology has emerged as a second revolution in plasma technology (see special issue Perspectives in Plasma Nanoscience edited by K. Ostrikov et al).
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