Adsorption-induced shape transitions in bistable nanopores with atomically thin walls
| Autor: | Oleg E. Shklyaev, Milton W. Cole, Vincent H. Crespi |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Nanotube
Materials science Bistability 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Nanopore Adsorption Gas pressure Chemical physics Lattice (order) 0103 physical sciences Zero temperature 010306 general physics 0210 nano-technology Astrophysics::Galaxy Astrophysics |
| Zdroj: | Physical review. E. 95(1-1) |
| ISSN: | 2470-0053 |
| Popis: | Atomically thin cylindrical nanopores can change shape in response to physically adsorbed gas inside. Coupled to a gas reservoir, an initially collapsed pore can expand to allow the adsorbed gas to form concentric shells on the inner part of the pore, driven by adsorption energetics, not gas pressure. A lattice gas model describes the evolution of the nanotube pore shape and absorbed gas as a function of gas chemical potential at zero temperature. We found that narrow-enough tubes are always expanded and gas inside adsorbs in sequences of concentric shells as the gas chemical potential increases. Wider tubes, which are collapsed without gas, can expand with one or more concentric shells adsorbed on the inner surface of the expanded region. |
| Databáze: | OpenAIRE |
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