Synthesis of Nested Coaxial Multiple-Walled Nanotubes by Atomic Layer Deposition
Synthesis of Nested Coaxial Multiple-Walled Nanotubes by Atomic Layer Deposition
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DOI：
10.1021/nn901250w
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发表时间：
2010-02-01
期刊：
影响因子：
17.1
通讯作者：
Namkoong, Gon
中科院分区：
文献类型：
--
作者：
Gu, Diefeng;Baumgart, Helmut;Namkoong, Gon
以纳米多孔阳极氧化铝（AAO）为模板，采用原子层沉积（ALD）技术成功合成了过渡金属氧化物、半导体和金属的嵌套多壁同轴纳米管结构。为了制造独立的管中管纳米结构，连续的ALD纳米管生长在AAO纳米通道的内部模板壁上。同轴的纳米管交替的ALD Al2O3的牺牲间隔，以化学去除从AAO模板释放的纳米管。在这项研究中，我们合成了一种新的纳米结构，多达五个嵌套的同轴纳米管AAO模板内。这种合成可以扩展到制造不同材料的n倍管中管纳米结构，应用于多传感器，宽带探测器，纳米电容器和光伏电池。
Nested multiple-walled coaxial nanotube structures of transition metal oxides, semiconductors, and metals were successfully synthesized by atomic layer deposition (ALD) techniques utilizing nanoporous anodic aluminum oxide (AAO) as templates. In order to fabricate free-standing tube-in-tube namostructures, successive ALD nanotubes were grown on the interior template walls of the AAO nanochannels. The coaxial nanotubes were alternated by sacrificial spacers of ALD Al2O3, to be chemically removed to release the nanotubes from the AAO template. In this study, we synthesized a novel nanostructure with up to five nested coaxial nanotubes within AAO templates. This synthesis can be extended to fabricate n-times tube-in-tube nanostructures of different materials with applications in multisensors, broadband detectors, nanocapacitors, and photovoltaic cells.