Silicon dioxide nanotubes prepared by anodic alumina as templates
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Silicon dioxide nanotubes prepared by anodic alumina as templates Ming Zhang, Y. Bando,a) and K. Wada National Institute for Research in Inorganic Materials, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan (Received 13 August 1999; accepted 4 November 1999)
Aligned slicon dioxide nanotubes with diameters of 30–40 nm synthesized by the sol-gel template method are presented. This process involves the growth of nanotubes from ordered nanochannel-array pores in anodic alumina. For a silica sol aged at room temperature and dipped for 1 min, nanowires were formed in a shorter period of aging time (2 days); nanotubes connecting with solid nanofibers were obtained in a longer aging time (30 days). The formation of nanotubes depends strongly on the temperature of the sol. For a short dipping time (
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