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

被引：36
|
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
收藏
页码：101 / 104
页数：4
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