Layer-by-layer assembled multilayer films of titanate nanotubes, Ag- or Au-loaded nanotubes, and nanotubes/nanosheets with polycations

被引:191
作者
Ma, RZ [1 ]
Sasaki, T [1 ]
Bando, Y [1 ]
机构
[1] NIMS, Adv Mat Lab, Tsukuba, Ibaraki 3050044, Japan
关键词
D O I
10.1021/ja048855p
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Aqueous suspensions of hydrothermally synthesized titanate nanotubes and poly(diallyldimethylammoniurn chloride) (PDDA) have been employed to fabricate multilayer films on various substrates in a layer-by-layer fashion. Atomic force microscopy displays the dense coverage of the substrate surface by the nanotubes. UV-vis absorption spectroscopy confirms the consecutive growth of PDDA/nanotube layer pairs. Single crystalline Ag and Au nanoparticles with narrow size distribution spatially correlating with the nanotubes have been obtained by treating the nanotubes with AgNO3 or HAuCl4 aqueous solution followed by chemical reduction. The noble metal nanoparticles show a strong surface plasmon absorption band. A multilayer film construction of the noble-metal-loaded nanotubes has also been achieved. This process has been further extended to the heteroassembly of nanotubes/nanosheets in different layer sequences.
引用
收藏
页码:10382 / 10388
页数:7
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