Investigation of the effects of high-energy proton-beam irradiation on metal-oxide surfaces by using methane adsorption isotherms
- Title
- Investigation of the effects of high-energy proton-beam irradiation on metal-oxide surfaces by using methane adsorption isotherms
- Author
- 김재용
- Keywords
- Adsorption; Proton beam; MgO; Methane
- Issue Date
- 2012-07
- Publisher
- Korean Physical SOC
- Citation
- Journal of the Korean Physical Society, 2012, 61(2), P.278-281
- Abstract
- The creation of possible local defects on metal-oxide surfaces due to irradiation with a high-energy proton beam was investigated by using a series of gas adsorption isotherms for methane (CH<sub>4</sub>) on a MgO powder surface. After a MgO powder surface having only a (100) surface had been irradiated with a 35-MeV proton beam, the second atomic layer of methane had completely disappeared while two distinct atomic layers were found in a layer-by-layer fashion on the surfaces of unirradiated samples. This subtle modification of the surface is evidenced by a change of the contrasts in the morphologies measured a using a transmission electron microscopy. Combined results obtained from an electron microscopy and methane adsorption isotherms strongly suggest that the high-energy proton-beam irradiation induced a local surface modification by imparting kinetic energy to the sample. The calculation of the 2-dimensional compressibility values, which are responsible for the formation of the atomic layers, confirmed the surface modification after irradiating surface-clean MgO powders with a proton beam.
- URI
- https://link.springer.com/article/10.3938%2Fjkps.61.278https://repository.hanyang.ac.kr/handle/20.500.11754/73044
- ISSN
- 0374-4884; 1976-8524
- DOI
- 10.3938/jkps.61.278
- Appears in Collections:
- COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > PHYSICS(물리학과) > Articles
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