Hyomen Kagaku
Online ISSN : 1881-4743
Print ISSN : 0388-5321
ISSN-L : 0388-5321
Special Issue: Surface Science of Nano-Carbon Materials
Hole Carrier Doping on NO2 and O3 Adsorption on H-terminated Diamond Surface
Makoto KASUHisashi SATOMichal KUBOVIC
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2012 Volume 33 Issue 10 Pages 575-582

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Abstract

The hole channel of hydrogen (H)-terminated diamond surface can be linked to adsorption of a specific gas species on the surface. O3, NO2, NO, and SO2 were identified as adsorbates, which induce holes on the H-terminated diamond surface. During NO2 adsorption, hole sheet concentration, ps, saturated at a certain value, however, in the NO2 gas concentration range of>300 ppm, the values were the same. Therefore we determined that the high limit of ps is∼9×1013 cm−2, which is 5.7% of the surface C-H bonds for (001) orientation. X-ray photoelectron spectroscopy investigation showed upward band bending and partial oxidation but no C-N bonds of the H-terminated surface after exposure to air and NO2. We propose a NO2 adsorption/desorption and hole-doping model to explain these experimental results.

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この記事はクリエイティブ・コモンズ [表示 - 非営利 4.0 国際]ライセンスの下に提供されています。
https://creativecommons.org/licenses/by-nc/4.0/deed.ja
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