Department of Electrical Engineering, Old Dominion University, Norfolk, VA 23529, USA.
ACS Nano. 2010 Feb 23;4(2):753-8. doi: 10.1021/nn901250w.
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 nanostructures, successive ALD nanotubes were grown on the interior template walls of the AAO nanochannels. The coaxial nanotubes were alternated by sacrificial spacers of ALD Al(2)O(3), 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.
利用原子层沉积（ALD）技术，通过以纳米多孔阳极氧化铝（AAO）为模板，成功合成了过渡金属氧化物、半导体和金属的嵌套式多壁同轴纳米管结构。为了制造独立的管中管纳米结构，在 AAO 纳米通道的内部模板壁上生长了连续的 ALD 纳米管。通过牺牲性的 ALD Al(2)O(3) 间隔物交替形成同轴纳米管，然后将其化学去除，从而将纳米管从 AAO 模板中释放出来。在这项研究中，我们在 AAO 模板内合成了一种具有多达五个嵌套同轴纳米管的新型纳米结构。这种合成方法可以扩展到制造 n 次管中管纳米结构，不同材料的管中管纳米结构具有在多传感器、宽带探测器、纳米电容器和光伏电池中的应用。
