| タイトル | Adsorption of oxygen on W/100/ - Adsorption kinetics and structure |
| 著者（英） | Poppa, H.; Bauer, E.; Viswanath, Y. |
| 著者所属（英） | Missouri Univ.|Technische Univ.|NASA Ames Research Center |
| 発行日 | 1976-08-01 |
| 言語 | eng |
| 内容記述 | The adsorption of oxygen on W(100) single-crystal surfaces is studied by Auger electron spectroscopy (AES), flash desorption, low-energy electron diffraction (LEED), and retarding-field work-function measurements. The AES results reveal stepwise changes in the sticking coefficients in the coverage range 0 to 1 and activated adsorption at higher coverages. Upon room-temperature adsorption, a series of complex LEED patterns is observed. In layers adsorbed at 1050 K and cooled to room temperature, the p(2 x 1) structure is the first ordered structure observed. This structure shows a reversible order-disorder transition between 700 and 1000 K and is characterized by a work function which is lower than that of the clean surface. Heating room-temperature adsorbates changes their structure irreversibly. At temperatures below 750 K, some new structures are observed. |
| NASA分類 | INORGANIC AND PHYSICAL CHEMISTRY |
| レポートNO | 77A10533 |
| 権利 | Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/440483 |
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