Interaction of the Helium, Hydrogen, Air, Argon, and Nitrogen Bubbles with Graphite Surface in Water
| Autor: | Victor Micheli, Gloria Gottardi, Nadhira Laidani, Martin Pykal, Michal Otyepka, Petr Lazar, Ruben Bartali |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Argon
Materials science Graphene Captive bubble method Analytical chemistry chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Surface energy 0104 chemical sciences law.invention Contact angle Surface tension chemistry Highly oriented pyrolytic graphite law General Materials Science Graphite Atomic physics 0210 nano-technology |
| Zdroj: | ACS Applied Materials & Interfaces. 9:17517-17525 |
| ISSN: | 1944-8252 1944-8244 |
| DOI: | 10.1021/acsami.6b16493 |
| Popis: | The interaction of the confined gas with solid surface immersed in water is a common theme of many important fields such as self-cleaning surface, gas storage, and sensing. For that reason, we investigated the gas-graphite interaction in the water medium. The graphite surface was prepared by mechanical exfoliation of highly oriented pyrolytic graphite (HOPG). The surface chemistry and morphology were studied by X-ray photoelectron spectroscopy, profilometry, and atomic force microscopy. The surface energy of HOPG was estimated by contact angle measurements using the Owens–Wendt method. The interaction of gases (Ar, He, H2, N2, and air) with graphite was studied by a captive bubble method, in which the gas bubble was in contact with the exfoliated graphite surface in water media. The experimental data were corroborated by molecular dynamics simulations and density functional theory calculations. The surface energy of HOPG equaled to 52.8 mJ/m2 and more of 95% of the surface energy was attributed to dispers... |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|