NEXAFS STUDY OF MOLECULAR-ORIENTATION IN PHYSISORBED OXYGEN ON GRAPHITE

被引：26

作者：

GUEST, RJ ^{[1
]}

NILSSON, A ^{[1
]}

BJORNEHOLM, O ^{[1
]}

HERNNAS, B ^{[1
]}

SANDELL, A ^{[1
]}

PALMER, RE ^{[1
]}

MARTENSSON, N ^{[1
]}

机构：

[1] UNIV UPPSALA, DEPT PHYS, S-75121 UPPSALA, SWEDEN

来源：

SURFACE SCIENCE | 1992年 / 269卷

关键词：

D O I：

10.1016/0039-6028(92)91288-M

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：

The results of a near-edge X-ray adsorption fine structure (NEXAFS) study of physisorbed oxygen on graphite at 25 K are reported. Two monolayer phases were investigated (delta and zeta), together with a multilayer of condensed O2. As the oxygen coverage is increased, an orientational transition between the monolayer delta and zeta-phases is clearly seen with the mean molecular tilt angle changing from 20-degrees to the surface to 37 +/- 10-degrees to the surface normal. In multilayer growth the molecules tend to tilt closer to the surface normal with increased oxygen dosage. These changes are discussed in terms of static and dynamic tilting.

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页码：432 / 437

页数：6

相关论文

共 26 条

[1] ORIENTATIONAL PHASE-TRANSITION IN THE SYSTEM PYRIDINE AG(111) - A NEAR-EDGE X-RAY-ABSORPTION FINE-STRUCTURE STUDY [J].

BADER, M ;

HAASE, J ;

FRANK, KH ;

PUSCHMANN, A ;

OTTO, A .

PHYSICAL REVIEW LETTERS, 1986, 56 (18) :1921-1924

[2] SIMULATIONS OF O2 ADSORBED ON GRAPHITE AT 45-K - THE MONOLAYER TO BILAYER TRANSITION [J].

BHETHANABOTLA, V ;

STEELE, W .

CANADIAN JOURNAL OF CHEMISTRY-REVUE CANADIENNE DE CHIMIE, 1988, 66 (04) :866-874

[3] MOLECULAR-DYNAMICS SIMULATIONS OF OXYGEN MONOLAYERS ON GRAPHITE [J].

BHETHANABOTLA, VR ;

STEELE, WA .

LANGMUIR, 1987, 3 (04) :581-587

[4] COMPLETE AND INCOMPLETE WETTING OF KRYPTON AND OXYGEN ON GRAPHITE - REENTRANT TYPE-2 GROWTH ON A SCALE OF SUBSTRATE STRENGTH [J].

BIENFAIT, M ;

SEGUIN, JL ;

SUZANNE, J ;

LERNER, E ;

KRIM, J ;

DASH, JG .

PHYSICAL REVIEW B, 1984, 29 (02) :983-987

[5] K-SHELL EXCITATION-SPECTRA OF CO, N2 AND O2 [J].

HITCHCOCK, AP ;

BRION, CE .

JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 1980, 18 (1-2) :1-21

[6] HREELS INVESTIGATION OF PHYSISORBED MOLECULES ON SINGLE-CRYSTALLINE SURFACES THROUGH DIPOLE AND RESONANT ELECTRON-SCATTERING MECHANISM [J].

JACOBI, K ;

BERTOLO, M ;

HANSEN, W .

JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 1990, 54 :529-540

[7] SELECTIVE RESONANCE POPULATION IN ELECTRON-SCATTERING BY ADSORBED MOLECULES [J].

JENSEN, ET ;

PALMER, RE ;

ROUS, PJ .

PHYSICAL REVIEW LETTERS, 1990, 64 (11) :1301-1304

[8] RESONANCE ELECTRON-SCATTERING BY O2 MONOLAYERS ON GRAPHITE [J].

JENSEN, ET ;

PALMER, RE ;

ROUS, PJ .

SURFACE SCIENCE, 1990, 237 (1-3) :153-172

[9] MOLECULAR-DYNAMICS SIMULATION AND ENERGY MINIMIZATION OF O-2 ADSORBED ON A GRAPHITE SURFACE [J].

JOSHI, YP ;

TILDESLEY, DJ .

SURFACE SCIENCE, 1986, 166 (01) :169-182

[10] STRUCTURAL ASPECTS OF THE MAGNETIC AND MELTING TRANSITIONS IN BILAYER MOLECULAR-OXYGEN ON GRAPHITE [J].

MOCHRIE, SGJ ;

SUTTON, M ;

AKIMITSU, J ;

BIRGENEAU, RJ ;

HORN, PM ;

DIMON, P ;

MONCTON, DE .

SURFACE SCIENCE, 1984, 138 (2-3) :599-609