Woodruff Jacob H, Ratchford Joshua B, Goldthorpe Irene A, McIntyre Paul C, Chidsey Christopher E D
Department of Chemistry, Stanford University, Stanford, California 94305-5080, USA.
Nano Lett. 2007 Jun;7(6):1637-42. doi: 10.1021/nl070595x. Epub 2007 May 27.
A linker-free method to deposit citrate-stabilized Au colloids onto hydrogen-terminated Si by acidifying the Au colloid solution with HF or HCl is presented. This method prevents oxide formation and provides a model system for studying orientation control of nanowires by epitaxy. Conditions are reported that result in vertically oriented Ge nanowires of uniform diameter and length on Si(111). We then present a method to remove Au catalysts from the nanowires with aqueous triiodide and HCl.
提出了一种无连接剂的方法，通过用HF或HCl酸化金胶体溶液，将柠檬酸盐稳定的金胶体沉积到氢终止的硅上。该方法可防止氧化物形成，并为通过外延研究纳米线的取向控制提供了一个模型系统。报道了在Si(111)上形成直径和长度均匀的垂直取向锗纳米线的条件。然后，我们提出了一种用三碘化水溶液和HCl从纳米线上去除金催化剂的方法。
