摘要
用最近发展起来的局域探测手段─扫描隧道显微镜（STM）及其相伴的方法如局域功函数等，对具有十分丰富局域结构的两亲分子和水的两元系统的聚集相作了初步研究，以期为两亲分子研究及局域化学的发展添砖加瓦.结果表明用STM可以真实地反映出各种聚集相的不同形貌，而且加上局域功函数像还可以揭示两亲分子的头尾取向．这对有机分子系统的局域结构的研究有普遍意义．
In the present paper various aggregation phases of the binary system of an am phiphile, P507 and water have been studied by means of scanning tunneling microscopy (STM), local-barrier-heigh(Φ) images and the tip height as a function of bias voltage.The sample was prepared by spreading a thin layer of P507 water solution on the graphite substrate and left in air for natural drying. Three different lyotropic mesomorphic phases (lamellar, hexagonal and cubic phases) along with the spherical, disk-like and rod-like micelles were imaged on the sample surface. The geometric shape and dimension of these phases match nicely what speculated in previous papers. Combining information from the STM and Φ images we are able to tell if the hydrophilic part of the molecules of a phase is inward or outward. Besides, the mechanical characteristics of the aggregation phases,which might be responsible for many important functions of biological membranes, have also been studied.
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
1996年第4期302-309,共8页
Acta Physico-Chimica Sinica
关键词
扫描隧道显微镜
两亲分子
胶团
介晶相
生物膜
Scanning tunneling microscopy, Amphiphile, Micelle, Lyotropic mesomorphic phase, Biological membrane
