Stereochemistry on Si(001):: Angular dependence of H2 dissociation -: art. no. 076107

被引：24

作者：

Dürr, M

Höfer, U

机构：

[1] Max Planck Inst Quantum Opt, D-85740 Garching, Germany

[2] Univ Marburg, Fachbereich Phys, D-35032 Marburg, Germany

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 88卷 / 07期

关键词：

D O I：

10.1103/PhysRevLett.88.076107

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The angular dependence of the dissociative adsorption of molecular hydrogen at terrace and step sites of vicinal single-domain Si(001) surfaces was investigated by means of molecular beam techniques and optical second-harmonic generation. A strongly anisotropic behavior was observed for terrace adsorption with polar distributions of cos(3)theta and cos(12)theta parallel and perpendicular to the dimer, respectively. The D-B-steps show enhanced reactivity under glancing incidence in the upwards direction. The results are traced back to the directionality of the covalent surface bonds.

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页数：4

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