A Molecular Dynamics Study on the Constraint Conditions of the Particle Growth Process in Laser Synthesis of Nanopowders

Laser-induced chemical vapor deposition (LICVD) is a nanopowder synthesis method in which the nanoparticles of a synthetic product undergo nucleation, growth, and agglomeration. The growth process is crucial because it directly determines the growth rate and final size of nanoparticles. In this pape...

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Main Authors:	Shiwei Zhang, Jun Liu, Zhijun Zhang, Wenhui Zhang
Format:	Article
Language:	English
Published:	Hindawi Limited 2012-01-01
Series:	Advances in Materials Science and Engineering
Online Access:	http://dx.doi.org/10.1155/2012/830140

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spelling	doaj-7d469207af90446e8ca47e5f688d815d2020-11-24T22:28:19ZengHindawi LimitedAdvances in Materials Science and Engineering1687-84341687-84422012-01-01201210.1155/2012/830140830140A Molecular Dynamics Study on the Constraint Conditions of the Particle Growth Process in Laser Synthesis of NanopowdersShiwei Zhang0Jun Liu1Zhijun Zhang2Wenhui Zhang3School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110004, ChinaNormal School, Shenyang University, Shenyang 110015, ChinaSchool of Mechanical Engineering and Automation, Northeastern University, Shenyang 110004, ChinaSchool of Mechanical Engineering and Automation, Northeastern University, Shenyang 110004, ChinaLaser-induced chemical vapor deposition (LICVD) is a nanopowder synthesis method in which the nanoparticles of a synthetic product undergo nucleation, growth, and agglomeration. The growth process is crucial because it directly determines the growth rate and final size of nanoparticles. In this paper, the nanoparticle growth process is analyzed through a molecular dynamics study, and the process is divided into five steps. In addition, this study explains the microscopic heat and mass transfer processes that occur in the surrounding space and on the particulate surface. Three constraint conditions that may restrict the growth process, namely, transfer constraint, surface constraint, and temperature constraint conditions, are proposed and modeled. To calculate the final diameter and the nanoparticle growth rate, formulae for the constraint conditions are developed. The behavior of four gases in the particulate growth zone is discussed in detail.http://dx.doi.org/10.1155/2012/830140
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Shiwei Zhang Jun Liu Zhijun Zhang Wenhui Zhang
spellingShingle	Shiwei Zhang Jun Liu Zhijun Zhang Wenhui Zhang A Molecular Dynamics Study on the Constraint Conditions of the Particle Growth Process in Laser Synthesis of Nanopowders Advances in Materials Science and Engineering
author_facet	Shiwei Zhang Jun Liu Zhijun Zhang Wenhui Zhang
author_sort	Shiwei Zhang
title	A Molecular Dynamics Study on the Constraint Conditions of the Particle Growth Process in Laser Synthesis of Nanopowders
title_short	A Molecular Dynamics Study on the Constraint Conditions of the Particle Growth Process in Laser Synthesis of Nanopowders
title_full	A Molecular Dynamics Study on the Constraint Conditions of the Particle Growth Process in Laser Synthesis of Nanopowders
title_fullStr	A Molecular Dynamics Study on the Constraint Conditions of the Particle Growth Process in Laser Synthesis of Nanopowders
title_full_unstemmed	A Molecular Dynamics Study on the Constraint Conditions of the Particle Growth Process in Laser Synthesis of Nanopowders
title_sort	molecular dynamics study on the constraint conditions of the particle growth process in laser synthesis of nanopowders
publisher	Hindawi Limited
series	Advances in Materials Science and Engineering
issn	1687-8434 1687-8442
publishDate	2012-01-01
description	Laser-induced chemical vapor deposition (LICVD) is a nanopowder synthesis method in which the nanoparticles of a synthetic product undergo nucleation, growth, and agglomeration. The growth process is crucial because it directly determines the growth rate and final size of nanoparticles. In this paper, the nanoparticle growth process is analyzed through a molecular dynamics study, and the process is divided into five steps. In addition, this study explains the microscopic heat and mass transfer processes that occur in the surrounding space and on the particulate surface. Three constraint conditions that may restrict the growth process, namely, transfer constraint, surface constraint, and temperature constraint conditions, are proposed and modeled. To calculate the final diameter and the nanoparticle growth rate, formulae for the constraint conditions are developed. The behavior of four gases in the particulate growth zone is discussed in detail.
url	http://dx.doi.org/10.1155/2012/830140
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A Molecular Dynamics Study on the Constraint Conditions of the Particle Growth Process in Laser Synthesis of Nanopowders

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