金属珠晶体，便于通过直流电加热。

Metal bead crystals for easy heating by direct current.

作者信息

Voigtländer Bert, Cherepanov Vasily, Elsaesser Christa, Linke Udo

机构信息

Institut für Bio- und Nanosysteme IBN-3 and Center of Nanoelectronic Systems for Information Technology (cni), Forschungszentrum Jülich, 52425 Jülich, Germany.

出版信息

Rev Sci Instrum. 2008 Mar;79(3):033911. doi: 10.1063/1.2894302.

DOI:10.1063/1.2894302

PMID:18377029

Abstract

The preparation of metal bead crystals with two wires attached to the crystal is described. These crystals allow for a very easy and efficient method to heat metal single crystals by direct current heating through the connecting wires of the bead crystal. This heating of the bead crystal is sufficient to clean metal surfaces such as the surfaces of Pt and Au as confirmed by Auger spectroscopy and scanning tunneling microscopy (STM). There is no need for any ion sputtering which is conventionally used to clean metal single crystal surfaces. The bead crystals with two leads fabricated from a wide range metals and metal alloys such as Cu, Mo, Ru, Rh, Pd, Ag, Ta, W, Re, Ir, Pt, Au, PtPd, PtRh, AuAg, and PtIr can be used as general purpose metal substrates for surface science studies and other applications. Additionally, these bead crystals can be used to reshape STM tips by indentation of the tip into the soft metal in order to recover atomic resolution imaging on hard substrates.

摘要

描述了带有连接到晶体的两根导线的金属珠晶体的制备方法。这些晶体提供了一种非常简单且高效的方法，通过珠晶体的连接线进行直流加热来加热金属单晶。如俄歇电子能谱和扫描隧道显微镜（STM）所证实的，这种对珠晶体的加热足以清洁诸如Pt和Au表面等金属表面。无需任何传统用于清洁金属单晶表面的离子溅射。由多种金属和金属合金（如Cu、Mo、Ru、Rh、Pd、Ag、Ta、W、Re、Ir、Pt、Au、PtPd、PtRh、AuAg和PtIr）制成的带有两根引线的珠晶体可用作表面科学研究和其他应用的通用金属基底。此外，这些珠晶体可用于通过将尖端压入软金属中来重塑STM尖端，以便在硬基底上恢复原子分辨率成像。