Interplay between step velocity and morphology during the dissolution of CaCO{sub 3} surface
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352 (United States)
The interplay between the velocity and morphology of steps during the dissolution of the cleaved CaCO{sub 3}(10{bar 1}4) surface in aqueous solution has been studied using atomic force microscopy (AFM). The experimental results were analyzed based on the terrace-ledge-kink model. Real-time AFM images show that, in the surface reaction regime, steps not only retreat at constant velocities which depend only on the atomic structure of the step, but also preserve a straight-edge morphology during the course of dissolution. The straight step morphology suggests that the nucleation of kinks is balanced by the annihilation of the kinks at the step during the dissolution. This result, along with the constant step velocity, can be explained in terms of a kink-kink annihilation process. {copyright} {ital 1996 American Vacuum Society}
- Research Organization:
- Pacific Northwest National Laboratory
- DOE Contract Number:
- AC06-76RL01830
- OSTI ID:
- 284666
- Report Number(s):
- CONF-9510385--
- Journal Information:
- Journal of Vacuum Science and Technology, A, Journal Name: Journal of Vacuum Science and Technology, A Journal Issue: 3 Vol. 14; ISSN 0734-2101; ISSN JVTAD6
- Country of Publication:
- United States
- Language:
- English
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