Development of Photoelectron Emitting Materials in Ambient Atmosphere

环境大气光电子发射材料的研究进展

• 批准号: 10555313
• 负责人: YAMANAKA Shoji
• 金额: $ 8.32万
• 依托单位: Hiroshima University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10555313/
• 关键词: Au thin film; photoelectron; work function; organic molecule; XPS; AFM; 紫外光; 金; 薄膜; 空気; 清浄化

Photoelectron emission from Au thin films was measured in ambient atmosphere with the presence of various kinds of organic vapors under irradiation of ultraviolet light (254 nm). The photoelectron emission was greatly influenced by the introduction of vapors. The observed effects were classified into three types; (i) Alkenes such as cyclohexene gave a large increase of photoelectron current with 02 in the atmosphere. (ii) Ethanol and water showed moderate and quick increases of the current irrespective to the presence of oxygen. (iii) Acetone reduced the photoelectron current irreversibly to near zero. The work function of Au thin films changed considerably upon the introduction of vapors ; a decrease with cyclohexene and an increase with acetone. X-ray photoelectron spectroscopy (XPS) analysis demonstrated that molecular oxygen reacted with cyclohexene to form oxygenated species on Au thin films under the irradiation of UV light, which appeared to induce the decrease of work function of the films.

在紫外光(254 Nm)照射下，测量了Au薄膜在大气中各种有机蒸气存在下的光电子发射。水蒸气的引入对光电子发射有很大影响。观察到的影响可分为三种类型：(1)环己烯等烯烃在大气中产生较大的光电子电流。(2)无论有无氧气，乙醇和水都表现出中等和快速的电流增加。(Iii)丙酮将光电子电流不可逆地降低到接近零的水平。随着水蒸气的引入，Au薄膜的功函数发生了很大的变化；环己烯的引入使功函数减小，丙酮的引入使功函数增大。X射线光电子能谱(XPS)分析表明，在紫外光照射下，分子氧与环己烯在Au薄膜上反应生成含氧物种，从而导致薄膜功函数的降低。

项目成果

Kei Inumaru: "Effect of Vapor Adsorption on the Photoelectron Emission form Gold in Ambient Atmosphere"Chemistry Letters. 741-742 (1999)

Kei Inumaru：“蒸气吸附对环境大气中金的光电子发射的影响”化学快报。

犬丸啓: "Au薄膜の大気下光電子放出に与える吸着分子の効果"触媒. (印刷中).

Kei Inumaru：“吸附分子对金薄膜大气光电子发射的影响”催化剂（正在出版）。

Kei Inumaru: "Effect of Vapor Adsorption on the Photoelectron Emission fom Gold in Ambient Atmosphere"Chemistry Letters. 1999. 741-742 (1999)

Kei Inumaru：“蒸气吸附对环境大气中金的光电子发射的影响”化学快报。

Kei Inumaru: "Effect of Molecular Adsorption on the Photoelectron Emission form Gold in Air"Shokubai (Catalysts). (in press).

Kei Inumaru：“分子吸附对空气中金的光电子发射的影响”触媒（催化剂）。

Kei Inumaru: "Effect of Vapor Adsorption on the Photoelectron Emission form Gold in Ambient Atmosphere"Chemistry Letters. 1999. 741-742 (1999)

Kei Inumaru：“蒸气吸附对环境大气中金的光电子发射的影响”化学快报。