Interferometric in-situ observation during nucleation and growth of WO3 nanocrystals in vapor phase

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	Interferometric in-situ observation during nucleation and growth of WO3 nanocrystals in vapor phase
	Kimura, Y ; Miura, H ; Tsukamoto, K ; Li, CR ; Maki, T
刊名	JOURNAL OF CRYSTAL GROWTH
	2011
卷号	316 期号:1 页码:196
关键词	MOLECULAR-DYNAMICS SIMULATION HOMOGENEOUS NUCLEATION CONCENTRATION FIELD PARTICLES GAS CONDENSATION CRYSTAL GRAINS
ISSN号	0022-0248
通讯作者	Kimura, Y: Tohoku Univ, Grad Sch Sci, Dept Earth & Planetary Mat Sci, Sendai, Miyagi 9808578, Japan.
中文摘要	To investigate the homogeneous nucleation and growth process of nanoparticles in vapor phase, interferometric observation was attempted for the first time to the gas evaporation method, which has been a commonly accepted physical production method of nanoparticles. Tungsten oxide was evaporated by electrical heating of a tungsten wire in a mixture gas of Ar and O-2. WO3 nanoparticles were formed via homogeneous nucleation and growth during a gas cools following a thermal convection produced by the evaporation source. The degree of supersaturation for nucleation was extremely high, 6.6 x 10(6), which was determined from the interferogram. Surface free energy of WO3 at 1100 K was calculated based on the classical nucleation theory and was 1.38 x 10(3) erg cm(-2), which is within the reported values. A part of the difference between actual formation rate of produced nanoparticles, which were determined based on a transmission electron microscope, and calculated values based on the classical nucleation theory were well explained if we adopt the idea of coalescence growth. (C) 2011 Elsevier B.V. All rights reserved.
收录类别	SCI
资助信息	KAKENHI [22684024]; JSPS [22244066]; Tohoku University; Tohoku University, Japan
语种	英语
公开日期	2013-09-18
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/40153]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Kimura, Y,Miura, H,Tsukamoto, K,et al. Interferometric in-situ observation during nucleation and growth of WO3 nanocrystals in vapor phase[J]. JOURNAL OF CRYSTAL GROWTH,2011,316(1):196.
APA	Kimura, Y,Miura, H,Tsukamoto, K,Li, CR,&Maki, T.(2011).Interferometric in-situ observation during nucleation and growth of WO3 nanocrystals in vapor phase.JOURNAL OF CRYSTAL GROWTH,316(1),196.
MLA	Kimura, Y,et al."Interferometric in-situ observation during nucleation and growth of WO3 nanocrystals in vapor phase".JOURNAL OF CRYSTAL GROWTH 316.1(2011):196.