STABILITY OF DISK AND STRIPE PATTERNS OF NANOSTRUCTURES AT SURFACES

SURFACE SCIENCE

卷:342

Letter

ZEPPENFELD, P ; KRZYZOWSKI, MA ; ROMAINCZYK, C ; DAVID, R ; COMSA, G ; RODER, H ; BROMANN, K ; BRUNE, H ; KERN, K

关键词: ATOM-SOLID SCATTERING AND DIFFRACTION - ELASTIC;    LOW INDEX SINGLE CRYSTAL SURFACES;    PLATINUM;    SCANNING TUNNELING MICROSCOPY;    SILVER;    SURFACE STRESS;    SURFACE STRUCTURE, MORPHOLOGY, ROUGHNESS, AND TOPOGRAPHY;   

DOI  :  10.1016/0039-6028(95)00891-8

来源: Elsevier

【 摘 要 】

The ordering of two-dimensional Ag islands embedded in the Pt(111) surface layer has been investigated using He-atom scattering and scanning tunneling microscopy. At lower Ag coverage the embedded islands consist of compact clusters (disks) arranged into a short-range ordered two-dimensional array. At higher coverage the Ag islands have an elongated shape leading to a ''labyrinthine'' pattern of regularly spaced meandering stripes. As the temperature is increased, both the disk and stripe arrays of embedded Ag clusters transform reversibly into a disordered 2D Ag-Pt mixture. The observed behavior is explained in terms of strain-induced long-range interactions.

【 授权许可】

Free