Phase Diagram of a Physisorbed Krypton Monolayer on Graphite Using an Ellipsometric Technique
- Title
- Phase Diagram of a Physisorbed Krypton Monolayer on Graphite Using an Ellipsometric Technique
- Authors
- Choi, B. I.; Nham, H. S.; Youn, H. S.; null
- Date Issued
- 2008-01
- Publisher
- .
- Abstract
- Vapor pressure adsorption of krypton on highly-oriented pyrolytic graphite (HOPG) in the monolayer region has been studied using a phase-modulated ellipsometric technique. The two successive phase transitions, gas-liquid (or fluid)-solid, were observed during build-up of a monolayer and from these, a 2D triple point could be determined. We also observed that as the adsorption amount of an initially formed 2D solid layer increased, the commensurate - incommensurate structural phase transition progressed. The phase transition from a 2D fluid to a 2D solid was a first order transition, which means that a 2D super-critical fluid can coexist with commensurate solid, which contradicts Berker's theory.
- Keywords
- Physisorption; Krypton; Monolayer; Critical temperature; Phase diagram; MULTILAYER ADSORPTION; ARGON FILMS; TEMPERATURE; DIFFRACTION; METHANE; XENON; GASES; AR
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/29188
- ISSN
- 0374-4884
- Article Type
- Article
- Files in This Item:
- There are no files associated with this item.
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