The Oil-Water Interface: Mapping the Solvation Potential

doi:10.1021/ja805962x

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	The Oil-Water Interface: Mapping the Solvation Potential
	Bell, Richard C.1; Wu, Kai 2; Iedema, Martin J.3; Schenter, Gregory K.3; Cowin, James P.3
刊名	JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
	2009-01-28
卷号	131 期号:3 页码:1037-1042
ISSN号	0002-7863
DOI	10.1021/ja805962x
英文摘要	An ion moving across an oil-water interface experiences strong solvation changes. We have directly measured the solvation potential from 0.4 to 4 nm for Cs(+) ions approaching the oil-water interface from the oil side ("oil" = 3-methylpentane). The interfaces were built at 30 K using molecular beam epitaxy. Ions were precisely placed within the film during its growth using a soft-landing ion beam. The ion's collective electric field was progressively increased (by adding more ions) until it balanced the individual ion's solvation potential slope. As the samples were slowly warmed, near 90 K the ions began moving, as measured by a Kelvin probe. Their motion precisely determines the local slope of the solvation potential, which was integrated to get the potential. The potential is Born-like for z > 0.4 nm away from the oil-water interface. Our method could provide important tests of theoretical estimates of ion motion at biological interfaces and in atmospheric aerosols.
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000264791600043
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/68205]
专题	中国科学院化学研究所
通讯作者	Bell, Richard C.
作者单位	1.Penn State Univ, Dept Chem, Altoona, PA 16601 USA 2.Peking Univ, Beijing Natl Lab Mol Sci, Coll Chem & Mol Engn, Beijing 100871, Peoples R China 3.Pacific NW Natl Lab, Richland, WA 99354 USA
推荐引用方式 GB/T 7714	Bell, Richard C.,Wu, Kai,Iedema, Martin J.,et al. The Oil-Water Interface: Mapping the Solvation Potential[J]. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,2009,131(3):1037-1042.
APA	Bell, Richard C.,Wu, Kai,Iedema, Martin J.,Schenter, Gregory K.,&Cowin, James P..(2009).The Oil-Water Interface: Mapping the Solvation Potential.JOURNAL OF THE AMERICAN CHEMICAL SOCIETY,131(3),1037-1042.
MLA	Bell, Richard C.,et al."The Oil-Water Interface: Mapping the Solvation Potential".JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 131.3(2009):1037-1042.