Femtosecond laser desorption of CO from the Pt(111) surface

被引：27
|
作者：
Cai, L [1 ]
Xiao, XD [1 ]
Loy, MMT [1 ]
机构：
[1] Hong Kong Univ Sci & Technol, Dept Phys, Hong Kong, Hong Kong, Peoples R China
来源：
SURFACE SCIENCE | 2000年 / 464卷 / 2-3期
关键词：
carbon monoxide; laser methods; photon stimulated desorption (PSD); platinum;
D O I：
10.1016/S0039-6028(00)00754-8
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
We report the first study of femtosecond desorption of CO from Pt(111), using 800 nm laser pulses with durations from 125 fs to 1.5 ps. The results for the CO/Pt system are qualitatively similar to other diatomic molecule systems previously studied and can be understood using the electronic friction model. We also studied the CO desorption yield using frequency-chirped laser pulses of the same pulse duration. With the chirping magnitude of ca. 1.5% in our experiment we did not observe any difference between positive and negative chirping. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：L727 / L731
页数：5
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