期刊
ACS APPLIED MATERIALS & INTERFACES
卷 8, 期 10, 页码 6611-6620出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b11244
关键词
nanoporous; nanowires; dealloying gold; copper
资金
- German Research Foundation [DFG/INST163/2951]
- LOEWE research cluster RESPONSE (Hessen, Germany)
- la Region des Pays de la Loire-France through the Post-Doctorats internationaux program
Nanoporous materials are of great interest for various technological applications including sensors based on surface-enhanced-Raman scattering, catalysis, and biotechnology. Currently, tremendous efforts are dedicated to the development of porous one-dimensional materials to improve the properties of such class of materials. The main drawback of the synthesis approaches reported so far includes (i) the short length of the porous nanowires, which cannot reach the macroscopic scale, and (ii) the poor organization of the nanostructures obtained by the end of the synthesis process. In this work, we report for the first time on a two-step approach allowing treating highly ordered porous gold nanowire arrays with a length up to a few centimeters. This two-step approach consists of the growth of gold/copper alloy nanowires by magnetron cosputtering on, a nanograted silicon substrate, Serving as a physical template, followed by a selective dissolution of copper by an electrochemical anodic process in diluted sulfuric acid. We demonstrate that the pore size of the nanowires can be tailored between 6 and 21 rim by tuning the dealloying voltage between 0.2 and 0.4 V and the dealloying time within the range of 150-600 s. We further show that the initial gold content (11 to 26 atom %) and the diameter of the gold/copper alloy nanowires (135 to 250 inn) are two important parameters that must carefully be selected to precisely control the porosity of the material.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据