Noble-metal nanostructures on carburized W(110)

SURFACE SCIENCE

卷:605

Article

Bachmann, Magdalena¹  Memmel, Norbert¹  Bertel, Erminald¹ 

[1] Univ Innsbruck, Inst Phys Chem, A-6020 Innsbruck, Austria

关键词: Tungsten;    Carbon;    Nanostructures;    Gold;    Silver;    Copper;   

DOI  :  10.1016/j.susc.2011.04.013

来源: Elsevier

【 摘 要 】

Noble metal nanostructures of Au, Ag and Cu were prepared on two types of carbon-modified W(110) surfaces R(15 x 12) and R(15 x 3) and investigated by means of scanning tunneling microscopy. For all deposited metals qualitatively the same behaviour is observed: On the R(15 x 12)-template always isotropic clusters are formed. In contrast, on the R(15 x 3)-substrate the anisotropy of the nanostructures can be tuned from clusters at low temperatures via thin nanowires to thicker nanobars at high deposition temperatures. At intermediate temperatures on the R(15 x 3) the anisotropic Au nanowires arrange themselves into straight lines along domain boundaries induced by deposition of the Au metal. Similarities and differences to Au nanostructures as recently reported by Varykhalov et al. [A. Varykhalov, O. Rader, W. Gudat. Physical Review B 77, 035412 (2008).] are discussed. (C) 2011 Elsevier B.V. All rights reserved.

【 授权许可】

Free