Bachmann Magdalena, Memmel Norbert, Bertel Erminald
Institute of Physical Chemistry, University of Innsbruck, Innrain 52a, 6020 Innsbruck, Austria.
Surf Sci. 2011 Jul;605(13-14):1263-1270. doi: 10.1016/j.susc.2011.04.013.
Noble metal nanostructures of Au, Ag and Cu were prepared on two types of carbon-modified W(110) surfaces-R(15 × 12) and R(15 × 3)-and investigated by means of scanning tunneling microscopy. For all deposited metals qualitatively the same behaviour is observed: On the R(15 × 12)-template always isotropic clusters are formed. In contrast, on the R(15 × 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 × 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.
在两种类型的碳改性W(110)表面——R(15×12)和R(15×3)上制备了Au、Ag和Cu的贵金属纳米结构，并通过扫描隧道显微镜进行了研究。对于所有沉积的金属，观察到定性相同的行为：在R(15×12)模板上总是形成各向同性的团簇。相比之下，在R(15×3)衬底上，纳米结构的各向异性可以在低温下从团簇通过细纳米线调节到高温下更厚的纳米棒。在R(15×3)的中间温度下，各向异性的Au纳米线沿着由Au金属沉积诱导的畴边界排列成直线。讨论了与Varykhalov等人最近报道的Au纳米结构的异同[A. Varykhalov, O. Rader, W. Gudat. Physical Review B 77, 035412 (2008).]。
