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Analysis of surface, subsurface, and bulk hydrogen in ZnO using nuclear reaction analysis

机译:使用核反应分析法分析ZnO中的表面,地下和大量氢

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摘要

Hydrogen concentrations in ZnO single crystals exposing different surfaces have been determined to be in the range of (0.02-0.04) at.% with an error of ±0.01 at.% using nuclear reaction analysis. In the subsurface region, the hydrogen concentration has been determined to be higher by up to a factor of 10. In contrast to the hydrogen in the bulk, part of the subsurface hydrogen is less strongly bound, can be removed by heating to 550 °C, and reaccommodated by loading with atomic hydrogen. By exposing the ZnO(1010) surface to water above room temperature and to atomic hydrogen, respectively, hydroxylation with the same coverage of hydrogen is observed.
机译:使用核反应分析,已确定暴露于不同表面的ZnO单晶中的氢浓度在(0.02-0.04)at。%的范围内,误差为±0.01 at。%。在地下区域,已确定氢浓度最高可升高10倍。与主体中的氢相反,部分地下氢的结合力较弱,可通过加热到550°C除去,并通过加载氢原子来重新容纳。通过分别将ZnO(1010)表面暴露于高于室温的水中和原子氢,可以观察到具有相同氢覆盖率的羟基化反应。

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