Thermally assisted photoreduction of vertical silver nanowires

Hsien Tse Tung, In-Gann Chen, Jenn Ming Song, Cheng Wei Yen

研究成果: Article同行評審

24 引文 斯高帕斯(Scopus)

摘要

Vertically grown silver nanowires (Ag NWs) 100-150 nm in diameter and 5-10 μm in length have been successfully prepared by thermally assisted photoreduction (TAP) of aqueous silver nitrate (AgNO3) solution on anatase films without using surfactants, templates or seeds. X-Ray diffraction (XRD) and transmission electron microscopy (TEM) show that the Ag NWs thus produced are single-crystalline with a preferred growth direction along [11̄0]. Investigation of their electrical behavior, using a scanning electron microscope (SEM) equipped with a nano-manipulation device, showed that the resistivity of the Ag NWs is about 18.79 μΩ cm, indicating their excellent quality. The nucleation and yield (i.e. number of NWs per 100 μm2) are closely related to the crystallinity, surface morphology, and the photocatalytic ability of the anatase substrates. The length distribution of the Ag NWs is dominated by the temperature of the post-heat treatment, which affects the supply of thermal electrons for NW growth. It is also demonstrated that various face-centered cubic (FCC) metallic NWs, including gold and copper, can also be obtained by the TAP process. The yield of NWs is inversely proportional to the charge number of the metallic cations in aqueous solution.

原文English
頁(從 - 到)2386-2391
頁數6
期刊Journal of Materials Chemistry
19
發行號16
DOIs
出版狀態Published - 2009 四月 15

All Science Journal Classification (ASJC) codes

  • 化學 (全部)
  • 材料化學

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