AVS 52nd International Symposium
    Nanometer-Scale Science and Technology Tuesday Sessions
       Session NS-TuP

Paper NS-TuP36
Synthesis of Au Nanotubes with SiO@sub x@ Nanowires as Sacrificial Templates

Tuesday, November 1, 2005, 4:00 pm, Room Exhibit Hall C&D

Session: Nanometer Scale Science and Technology Poster Session
Presenter: M.Y. Lu, National Tsing Hua University, Taiwan, ROC
Authors: M.Y. Lu, National Tsing Hua University, Taiwan, ROC
Y.C. Chang, National Tsing Hua University, Taiwan, ROC
L.J. Chen, National Tsing Hua University, Taiwan, ROC
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Gold nanotubes with SiO@sub x@ nanowires as sacrificial templates have been synthesized. SiO@sub x@ nanowires were functionalized by 3-aminopropyl trimethoxysilane (APTMS) that generates a charged surface. The attachment of negatively charged gold nanoparticles was followed. The coverage of Au nanoparticles was initially less than 30 percents. Further coverage was achieved by the reduction of gold hydroxide to grow the continuous nanoshell on Au nanoparticles, which serve as nucleation sites. The final coverage of gold nanoshells on SiO@sub x@ nanowires depends strongly on the relative amount of SiO@sub x@ nanowires in gold hydroxide solution. TEM images showing the progressive growth of gold shells on SiO@sub x@ nanowires decorated with Au nanoparticles. FESEM image shows the open ends of Au nanostructures after etching by HF solution confirming the formation of Au nanotubes by a simple route.