Growth of liquid bridge in AFM

CORC > 力学研究所 > 中国科学院力学研究所 > 力学所知识产出(1956-2008)

	Growth of liquid bridge in AFM
	Wei Z(魏征); Zhao YP(赵亚溥)
刊名	Journal of Physics D-Applied Physics
	2007
通讯作者邮箱	yzhao@imech.ac.cn
卷号	40 期号:14 页码:4368-4375
关键词	Atomic-Force Microscope Capillary Condensation Adhesion Forces Water Adsorption Silicon Mica Pressure Surfaces Films
ISSN号	0022-3727
通讯作者	Zhao, YP (reprint author), Chinese Acad Sci, State Key Lab Nonlinear Mech, Inst Mech, Beijing 100080, Peoples R China.
中文摘要	Capillary forces are dominant in adhesive forces measured with an atomic force microscope (AFM) in ambient air, which are thought to be dependent on water film thickness, relative humidity and the free energy of the water film. In this paper, besides these factors, we study the nature of the 'pull-off' force on a variety of atmospheres as a function of the contact time. It is found that capillary forces strongly depend on the contact time. In lower relative humidity atmosphere, the adhesion force is almost independent of the contact time. However, in higher relative humidity, the adhesion force increases with the contact time. Based on the experiment and a model that we present in this paper, the growth of the liquid bridge can be seen as undergoing two processes: one is water vapour condensation; the other is the motion of the thin liquid film that is absorbed on the substrate. The experiment and the growth model presented in this paper have direct relevance to the working mechanism of AFM in ambient air.
类目[WOS]	Physics, Applied
研究领域[WOS]	Physics
关键词[WOS]	ATOMIC-FORCE MICROSCOPE ; CAPILLARY CONDENSATION ; ADHESION FORCES ; WATER ; ADSORPTION ; SILICON ; MICA ; PRESSURE ; SURFACES ; FILMS
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000247930400037
公开日期	2009-08-03 ; 2010-06-13
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/33947]
专题	力学研究所_力学所知识产出(1956-2008)
推荐引用方式 GB/T 7714	Wei Z,Zhao YP. Growth of liquid bridge in AFM[J]. Journal of Physics D-Applied Physics,2007,40(14):4368-4375.
APA	魏征,&赵亚溥.(2007).Growth of liquid bridge in AFM.Journal of Physics D-Applied Physics,40(14),4368-4375.
MLA	魏征,et al."Growth of liquid bridge in AFM".Journal of Physics D-Applied Physics 40.14(2007):4368-4375.