Entropic force between biomembranes

doi:10.1007/s10409-016-0588-9

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	Entropic force between biomembranes
	Li L(李龙); Song F(宋凡); Song, F (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100190, Peoples R China.; Song, F (reprint author), Chinese Acad Sci, Inst Mech, Beijing Key Lab Engn Construct & Mechanobiol, Beijing 100190, Peoples R China.; Song, F (reprint author), Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China.
发表期刊	ACTA MECHANICA SINICA
	2016
卷号	32 期号:5 页码:970-975
ISSN	0567-7718
摘要	Undulation force, an entropic force, stems from thermally excited fluctuations, and plays a key role in the essential interactions between neighboring surfaces of objects. Although the characteristics of the undulation force have been widely studied theoretically and experimentally, the distance dependence of the force, which constitutes its most fundamental characteristic, remains poorly understood. In this paper, first, we obtain a novel expression for the undulation force by employing elasticity and statistical mechanics and prove it to be in good agreement with existing experimental results. Second, we clearly demonstrate that the two representative forms of the undulation force proposed by Helfrich and Freund were respectively the upper and lower bounds of the present expression when the separation between membranes is sufficiently small, which was intrinsically different from the existing results where Helfrich's and Freund's forms of the undulation force were only suitable for the intermediate and small separations. The investigations show that only in a sufficiently small separation does Helfrich's result stand for the undulation force with a large wave number and Freund's result express the force with a small wave number. Finally, a critical acting distance of the undulation force, beyond which the entropic force will rapidly decay approaching zero, is presented.
关键词	Undulation Force Flexible Membrane Entropic Force Confined Fluctuations
DOI	10.1007/s10409-016-0588-9
URL	查看原文
收录类别	SCI ; EI ; CSCD
语种	英语
WOS记录号	WOS:000386498900017
关键词[WOS]	Undulation force ; Flexible membrane ; Entropic force ; Confined fluctuations
WOS研究方向	Engineering ; Mechanics
WOS类目	Engineering, Mechanical ; Mechanics
项目资助者	The project was supported by the programs in the National Natural Science Foundation of China (Grants 11232013 and 11472285). L. Li thanks L.B. Freund and R. Lipowsky for insightful discussions. F. Song is very grateful to Y.L. Bai of State Key Laboratory of Nonlinear Mechanics and F.J. Ke of Beijing University of Aeronautics and Astronautics for helpful discussions.
课题组名称	LNM生物材料微结构和力学性能
论文分区	二类
力学所作者排名	True
引用统计	被引频次：8[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/59694
专题	非线性力学国家重点实验室
通讯作者	Song, F (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100190, Peoples R China.; Song, F (reprint author), Chinese Acad Sci, Inst Mech, Beijing Key Lab Engn Construct & Mechanobiol, Beijing 100190, Peoples R China.; Song, F (reprint author), Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China.
推荐引用方式 GB/T 7714	Li L,Song F,Song, F ,et al. Entropic force between biomembranes[J]. ACTA MECHANICA SINICA,2016,32,5,:970-975.
APA	李龙,宋凡,Song, F ,Song, F ,&Song, F .(2016).Entropic force between biomembranes.ACTA MECHANICA SINICA,32(5),970-975.
MLA	李龙,et al."Entropic force between biomembranes".ACTA MECHANICA SINICA 32.5(2016):970-975.

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