Size effect of the surface energy density of nanoparticles

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	Size effect of the surface energy density of nanoparticles
	Yao Y (姚寅); Wei YC (魏遥驰); Chen SH(陈少华)
刊名	Surface Science
	2015-01-29
通讯作者邮箱	chenshaohua72@hotmail.com
卷号	636 页码:19-24
关键词	Metallic nanoparticles Size effect Lattice contraction Surface energy density
ISSN号	0039-6028
通讯作者	Chen SH(陈少华)
英文摘要	The surface energy density of nanoparticles exhibits an obviously size-dependent behavior. However, how the surface energy density changes with the diameter of nanoparticles is still ambiguous. Based on a recently developed continuum theory considering the size effect in nanomaterials, theoretical analysis is carried out for various fcc metallic nanoparticles. Surface lattice contractions of nanoparticles are predicted and compared with the existing experimental data. As a result, the surface energy density decreases with the increase of nanoparticle diameter. Such a variation trend of surface energy density is contrary to the prediction of existing theoretical models but well consistent with the previously atomistic simulations and density functional calculations. The results in this paper provide a further understanding of the surface effect of nanoparticles, which should be helpful for the design of nanoscale devices or nanomaterials related to nanoparticles, such as NEMs and nanoparticle-reinforced composites.
学科主题	新型材料的力学问题
分类号	二类/Q2
收录类别	SCI ; EI
原文出处	http://dx.doi.org/10.1016/j.susc.2015.01.016
语种	英语
WOS记录号	WOS:000351798100004
公开日期	2015-02-13
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/49540]
专题	力学研究所_非线性力学国家重点实验室
推荐引用方式 GB/T 7714	Yao Y ,Wei YC ,Chen SH. Size effect of the surface energy density of nanoparticles[J]. Surface Science,2015,636:19-24.
APA	Yao Y ,Wei YC ,&Chen SH.(2015).Size effect of the surface energy density of nanoparticles.Surface Science,636,19-24.
MLA	Yao Y ,et al."Size effect of the surface energy density of nanoparticles".Surface Science 636(2015):19-24.