通过原位超高真空透射电子显微镜观察到的氧气与Cu(001)相互作用导致的表面重构和氧化物成核

Surface Reconstruction and Oxide Nucleation Due to Oxygen Interaction with Cu(001) Observed by In Situ Ultra-High Vacuum Transmission Electron Microscopy.

作者信息

Yang JC, Yeadon M, Kolasa B, Gibson JM

机构信息

Frederick Seitz Materials Research Laboratory, 104 South Goodwin Avenue, University of Illinois at Urbana-Champaign, Urbana, IL 61801

出版信息

Microsc Microanal. 1998 May;4(3):334-339. doi: 10.1017/s1431927698980345.

DOI:10.1017/s1431927698980345

PMID:9767671

Abstract

: Reconstruction of the Cu(001) surface due to oxygen gas impingement on a clean copper surface was directly observed by in situ UHV-TEM. Strain contrast between differently oriented surface reconstruction domains, assumed to be radical2 x 2 radical2 R45, were clearly visible by this method. The reconstruction precedes the nucleation of Cu2O islands. When Cu2O islands were partially reduced and then re-oxidized, a dwell time before formation of Cu2O was noted, demonstrating that a reconstructed Cu-O surface monolayer is necessary before oxide formation.

摘要

通过原位超高真空透射电子显微镜（UHV-TEM）直接观察到，由于氧气冲击清洁的铜表面，Cu(001)表面发生了重构。通过这种方法，可以清楚地看到不同取向的表面重构畴之间的应变对比度，假设其为√2×√2 R45。这种重构先于Cu2O岛的成核。当Cu2O岛部分还原然后再氧化时，注意到在Cu2O形成之前有一个停留时间，这表明在氧化物形成之前，需要一个重构的Cu-O表面单层。