THE FORMATION DYNAMICS OF CHOLESTEROL FILMS PREPARED BY SPONTANEOUS SELF-ASSEMBLY METHOD

被引：3

作者：

AMIRE, OA ^{[1
]}

机构：

[1] OBAFEMI AWOLOWO UNIV,DEPT CHEM,IFE,NIGERIA

来源：

BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN | 1994年 / 67卷 / 01期

关键词：

D O I：

10.1246/bcsj.67.7

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The dynamics of the process of formation of cholesterol films on a solid substrate prepared by the spontaneous self-assembly technique has been investigated. An expression for the coverage in a multilayer system was derived. Application of the equation to cholesterol multilayer him formation kinetics shows that the approach to equilibrium of the self-assembly process obeys first-order rate law. An observed adsorption free energy change of -21..7 +/- 0.1 kJ mol(-1) was obtained for cholesterol on quartz slide and a mean lifetime of cholesterol on the slide surface during deposition of 78 +/- 3 ks at 298.16 K. A mean lifetime for stearic acid adsorbed from hexadecane onto native aluminium oxide surface (data from elsewhere) was found to be 12.4 +/- 0.3 ks. The results suggest dynamic processes which strongly depend on the formation constant of the amphiphile for coordination to the substrate.

引用

页码：7 / 12

页数：6

共 25 条

[1] SPONTANEOUSLY ORGANIZED MOLECULAR ASSEMBLIES .1. FORMATION, DYNAMICS, AND PHYSICAL-PROPERTIES OF NORMAL-ALKANOIC ACIDS ADSORBED FROM SOLUTION ON AN OXIDIZED ALUMINUM SURFACE [J].