Atomic layer wear of single‐crystal calcite in aqueous solution using scanning force microscopy
作者:
Nam‐Seok Park,
Myoung‐Won Kim,
S. C. Langford,
J. T. Dickinson,
期刊:
Journal of Applied Physics
(AIP Available online 1996)
卷期:
Volume 80,
issue 5
页码: 2680-2686
ISSN:0021-8979
年代: 1996
DOI:10.1063/1.363185
出版商: AIP
数据来源: AIP
摘要:
Scanning force microscopy (SFM) is employed to study nm‐scale wear of single‐crystal calcite in an aqueous solution. When the SFM tip is drawn back and forth in a linear fashion across the edge of a preexisting single atomic layer etch pit, dissolution is strongly enhanced at the point where the tip crosses the step. The wear rate as a function of contact force is consistent with a thermally activated wear process, where the activation energy is locally reduced in the strain field of the SFM tip. The activation volume for the strain dependence is on the order of the average volume per ion in the CaCO3lattice. This study provides further support for strain enhanced nucleation of double kinks along preexisting steps. ©1996 American Institute of Physics.
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