Branched Silicon Nanotubes and Metal Nanowires via AAO-Template-Assistant Approach

• Published in: Advanced functional materials Vol. 20; no. 21; pp. 3791 - 3796
• Main Authors: Chen, Bensong, Xu, Qiaoling, Zhao, Xianglong, Zhu, Xiaoguang, Kong, Mingguang, Meng, Guowen
• Format: Journal Article
• Language: English
• Published: New York WILEY-VCH Verlag 09.11.2010; WILEY‐VCH Verlag
• Subjects: nanostructures; nanotubes; nanowires; template synthesis
• ISSN: 1616-301X; 1616-3028
• DOI: 10.1002/adfm.201001190

Branched and multi‐generation branched architectures of silicon nanotubes (SiNTs) and metal nanowires (NWs), built via filling the branched and multi‐generation‐branched nanochannels of anodic aluminum oxide (AAO) templates by pyrolysis of silane and electrodeposition of metals, are reported. The AAO templates with branched and multi‐generation‐branched nanochannels are created by sequentially reducing the applied anodizing voltage multiple times during the anodization of aluminum. The desired total generation number of branching can be controlled by the times of voltage reduction during the anodization; while each generation of branching is controlled in terms of branching number, diameter and length. The approach allows precise control over the complexity of the SiNTs and metal NWs with several levels of junctions and branching that have potentials in nanoelectronics, nanomagnetism and nanosystems. Branched and multi‐generation‐branched silicon nanotubes and metal (Au and Ni) nanowires have been achieved by filling the branched and multi‐generation‐branched nanochannels of the anodic aluminum oxide templates, which are created by sequentially reducing the applied anodizing voltage multiple times during the anodization of aluminum.