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

页码：L727 / L731

页数：5

共 27 条

[11] Surface femtochemistry of CO/O2/Pt(111):: The importance of nonthermalized substrate electrons [J].

Her, TH ;

Finlay, RJ ;

Wu, C ;

Mazur, E .

JOURNAL OF CHEMICAL PHYSICS, 1998, 108 (20) :8595-8598

[12] SINGLE-SHOT MEASUREMENT OF THE INTENSITY AND PHASE OF AN ARBITRARY ULTRASHORT PULSE BY USING FREQUENCY-RESOLVED OPTICAL GATING [J].

KANE, DJ ;

TREBINO, R .

OPTICS LETTERS, 1993, 18 (10) :823-825

[13] FEMTOSECOND VERSUS NANOSECOND SURFACE PHOTOCHEMISTRY - O2+CO ON PT(111) AT 80-K [J].

KAO, FJ ;

BUSCH, DG ;

DACOSTA, DG ;

HO, W .

PHYSICAL REVIEW LETTERS, 1993, 70 (26) :4098-4101

[14] FEMTOSECOND LASER-DESORPTION OF MOLECULARLY ADSORBED OXYGEN FROM PT(111) [J].

KAO, FJ ;

BUSCH, DG ;

COHEN, D ;

DACOSTA, DG ;

HO, W .

PHYSICAL REVIEW LETTERS, 1993, 71 (13) :2094-2097

[15] Optical control of yields of CO photodesorbed from Cu(001) by chirped light pulses: density matrix theory and calculations [J].

Micha, DA ;

Yi, ZG .

CHEMICAL PHYSICS LETTERS, 1998, 298 (4-6) :250-256

[16] DESORPTION INDUCED BY MULTIPLE ELECTRONIC-TRANSITIONS [J].

MISEWICH, JA ;

HEINZ, TF ;

NEWNS, DM .

PHYSICAL REVIEW LETTERS, 1992, 68 (25) :3737-3740

[17] Anomalous branching ratio in the femtosecond surface chemistry of O-2/Pd(111) [J].

Misewich, JA ;

Nakabayashi, S ;

Weigand, P ;

Wolf, M ;

Heinz, TF .

SURFACE SCIENCE, 1996, 363 (1-3) :204-213

[18] VIBRATIONALLY ASSISTED ELECTRONIC DESORPTION - FEMTOSECOND SURFACE-CHEMISTRY OF O2/PD(111) [J].

MISEWICH, JA ;

KALAMARIDES, A ;

HEINZ, TF ;

HOFER, U ;

LOY, MMT .

JOURNAL OF CHEMICAL PHYSICS, 1994, 100 (01) :736-739

[19] VIBRATIONAL-ENERGY TRANSFER OF CO/CU(100) - NONADIABATIC VIBRATION ELECTRON COUPLING [J].

MORIN, M ;

LEVINOS, NJ ;

HARRIS, AL .

JOURNAL OF CHEMICAL PHYSICS, 1992, 96 (05) :3950-3956

[20]

NEWNS DM, 1991, PROGR THEORETISCAL S, V106

← 1 2 3 →