Adsorption of oleate on fluorite surface as revealed by atomic force microscopy

被引：37

作者：

Chennakesavulu, K. ^{[1
]}

Raju, G. Bhaskar ^{[1
]}

Prabhakar, S. ^{[1
]}

Nair, C. Madhavan ^{[2
]}

Murthy, K. V. G. K. ^{[2
]}

机构：

[1] CSIR Madras Complex, Natl Met Lab Madras Ctr, Madras 600113, Tamil Nadu, India

[2] Madras Inst Technol, AU KBC Res Ctr, Madras 600044, Tamil Nadu, India

来源：

INTERNATIONAL JOURNAL OF MINERAL PROCESSING | 2009年 / 90卷 / 1-4期

关键词：

Fluorite; Sodium oleate; Atomic force microscopy; Topography; Adsorption;

D O I：

10.1016/j.minpro.2008.10.011

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The adsorption of oleic acid/oleate on fluorite surface Could be Visualized using tapping mode of atomic force microscopy (AFM). The natural fluorite crystals were equilibrated with 10(-3) to 10(-7) M oleate solutions and their AFM images at each concentration along with height profiles were recorded. Even at low oleate concentration of 1 x 10(-7) M, concomitant monolayer and bilayer structures were observed. It suggests that normal-normal bonding of hydrocarbon chains takes place before the surface is completely covered by the monolayer. Multi-layer adsorption of oleate was observed at oleate concentrations of above 10(-4) M. The tapping mode AFM can be utilized to visualize the topography of surfaces adsorbed with surfactant Molecules. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：101 / 104

页数：4

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