Stansfield Gemma L, Johnston Helena M, Baxter Sean N, Thomas P John
School of Chemistry, The University of Manchester Oxford Road Manchester M13 9PL UK.
School of Chemistry, Bangor University Deniol Road Bangor LL57 2UW UK
RSC Adv. 2018 Feb 7;8(12):6225-6230. doi: 10.1039/c7ra13370g. eCollection 2018 Feb 6.
Thin films of Au, Ag and Ag-Au alloy nanocrystals extending to areas of several square centimetres are obtained by deposition at the interface of water and toluene. Toluene containing chlorotris(triphenylphosphine)silver(i) and/or chlorotriphenylphosphine gold(i) is reacted with aqueous tetrakishydroxymethylphosphonium chloride to obtain nanocrystalline films adhered to the interfacial region. Alloying was induced by varying the composition of the toluene layer. The composition change results in regular and reproducible variation in the transport characteristics of the films, with the initially metallic deposits turning non-metallic with increased Au content. The films at the interface were transferred to different substrates and characterised using atomic force microscopy, UV-visible spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy, scanning and transmission electron microscopy.
通过在水和甲苯的界面处沉积，可获得面积达几平方厘米的金、银和银金合金纳米晶体薄膜。含有三（三苯基膦）氯化银（Ⅰ）和/或三苯基膦氯化金（Ⅰ）的甲苯与四羟甲基氯化鏻水溶液反应，以获得附着在界面区域的纳米晶体薄膜。通过改变甲苯层的组成来诱导合金化。组成变化导致薄膜的传输特性出现规则且可重复的变化，随着金含量的增加，最初的金属沉积物变为非金属。将界面处的薄膜转移到不同的基底上，并使用原子力显微镜、紫外可见光谱、X射线衍射、X射线光电子能谱、扫描和透射电子显微镜进行表征。
