MORPHOLOGICAL EFFECTS INDUCED BY THE FORMATION OF A PT-ADATOM LATTICE GAS ON PT(111)

被引：58

作者：

MICHELY, T ^{[1
]}

LAND, T ^{[1
]}

LITTMARK, U ^{[1
]}

COMSA, G ^{[1
]}

机构：

[1] UNIV CALIF IRVINE, DEPT CHEM, IRVINE, CA 92717 USA

来源：

SURFACE SCIENCE | 1992年 / 272卷 / 1-3期

关键词：

D O I：

10.1016/0039-6028(92)91440-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：

After sputtering Pt(111) with 600 eV Ar+ ions at high sample temperatures three qualitative different morphological effects which all occur around 700 K have been identified by scanning tunneling microscopy (STM). The morphological effects observed by STM are: (1) The onset of the layer-by-layer removal, (2) the equilibration of the vacancy island shape and (3) the formation of large vacancy island free zones at the lower terraces in the vicinity of pre-existing steps. The effects are explained by one single assumption: a strong increase of the Pt-adatom density on the Pt(111) terraces is generated by two-dimensional atom evaporation from step edges at about 700 K.

引用

页码：204 / 210

页数：7

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