Surface femtochemistry of CO/O2/Pt(111):: The importance of nonthermalized substrate electrons

被引：39

作者：

Her, TH ^{[1
]}

Finlay, RJ ^{[1
]}

Wu, C ^{[1
]}

Mazur, E ^{[1
]}

机构：

[1] Harvard Univ, Gordon Mckay Lab, Cambridge, MA 02138 USA

来源：

JOURNAL OF CHEMICAL PHYSICS | 1998年 / 108卷 / 20期

关键词：

D O I：

10.1063/1.476289

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 studied the surface femtochemistry of CO/O-2/Pt(111) induced with 0.3 ps laser pulses over a wide range of wavelength and fluence. Below 10 mu J/mm(2), the yields depend linearly on fluence. Above 10 mu J/mm(2), the yields scale nonlinearly in the fluence. From the dependence of the yields on wavelength, we determine that the nonlinear surface femtochemistry is influenced by nonthermal substrate electrons. (C) 1998 American Institute of Physics. [S0021-9606(98)00920-9].

引用

页码：8595 / 8598

页数：4

共 28 条

[1]

Anismov S.I., 1974, Sov. Phys. JETP, V39, P375, DOI DOI 10.1016/J.JMATPROTEC.2009.05.031

[2] VIBRATIONAL DISTRIBUTIONS IN DESORPTION INDUCED BY FEMTOSECOND LASER-PULSES - COUPLING OF ADSORBATE VIBRATION TO SUBSTRATE ELECTRONIC EXCITATION [J].

BUDDE, F ;

HEINZ, TF ;

KALAMARIDES, A ;

LOY, MMT ;

MISEWICH, JA .

SURFACE SCIENCE, 1993, 283 (1-3) :143-157

[3] FEMTOSECOND TIME-RESOLVED MEASUREMENT OF DESORPTION [J].

BUDDE, F ;

HEINZ, TF ;

LOY, MMT ;

MISEWICH, JA ;

DEROUGEMONT, F ;

ZACHARIAS, H .

PHYSICAL REVIEW LETTERS, 1991, 66 (23) :3024-3027

[4] Direct observation of the crossover from single to multiple excitations in femtosecond surface photochemistry [J].

Busch, DG ;

Ho, W .

PHYSICAL REVIEW LETTERS, 1996, 77 (07) :1338-1341

[5] FEMTOSECOND DESORPTION DYNAMICS PROBED BY TIME-RESOLVED VELOCITY-MEASUREMENTS [J].

BUSCH, DG ;

GAO, SW ;

PELAK, RA ;

BOOTH, MF ;

HO, W .

PHYSICAL REVIEW LETTERS, 1995, 75 (04) :673-676

[6] SURFACE FEMTOCHEMISTRY OF O-2 AND CO ON PT(111) [J].

DELIWALA, S ;

FINLAY, RJ ;

GOLDMAN, JR ;

HER, TH ;

MIEHER, WD ;

MAZUR, E .

CHEMICAL PHYSICS LETTERS, 1995, 242 (06) :617-622

[7]

FANN WS, 1993, SURF SCI, V283, P221, DOI 10.1016/0039-6028(93)90985-S

[8] Reaction pathways in surface femtochemistry: routes to desorption and reaction in CO/O-2/Pt(111) [J].

Finlay, RJ ;

Her, TH ;

Wu, C ;

Mazur, E .

CHEMICAL PHYSICS LETTERS, 1997, 274 (5-6) :499-504

[9]

Finlay RJ, 1995, P SOC PHOTO-OPT INS, V2547, P218, DOI 10.1117/12.221499

[10] Quantum kinetic theory of vibrational heating and bond breaking by hot electrons [J].

Gao, SW .

PHYSICAL REVIEW B, 1997, 55 (03) :1876-1886

← 1 2 3 →