Optical trapping and integration of semiconductor nanowire assemblies in water
Optical trapping and integration of semiconductor nanowire assemblies in water
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DOI：
10.1038/nmat1563
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发表时间：
2006-02-01
期刊：
影响因子：
41.2
通讯作者：
Liphardt, J
中科院分区：
文献类型：
--
作者：
Pauzauskie, PJ;Radenovic, A;Liphardt, J
半导体纳米线由于其作为小型化电气（1）、纳米流体（2）和光学器件（3）的构建块的潜在用途而受到广泛关注。虽然化学纳米线合成程序已经成熟，并且现在产生具有特定组成（4）和生长方向（5）的纳米线，但是由于缺乏将纳米线组装成具有高空间和角度精度的复杂异质结构的方法，这些材料在科学、生物医学和微电子应用中的使用受到很大限制。在这里，我们表明，红外单光束光学陷阱可以用来单独捕获，转移和组装高深宽比的半导体纳米线在流体环境中的任意结构。直径小至20 nm且纵横比大于100的纳米线可以在三维中被捕获和传输，使得能够构建可以用作有源光子器件的纳米线架构。此外，纳米线结构现在可以在生理环境中组装，为活细胞提供新形式的化学，机械和光学刺激。
Semiconductor nanowires have received much attention owing to their potential use as building blocks of miniaturized electrical(1), nanofluidic(2) and optical devices(3). Although chemical nanowire synthesis procedures have matured and now yield nanowires with specific compositions(4) and growth directions(5), the use of these materials in scientific, biomedical and microelectronic applications is greatly restricted owing to a lack of methods to assemble nanowires into complex heterostructures with high spatial and angular precision. Here we show that an infrared single-beam optical trap can be used to individually trap, transfer and assemble high-aspect-ratio semiconductor nanowires into arbitrary structures in a fluid environment. Nanowires with diameters as small as 20 nm and aspect ratios of more than 100 can be trapped and transported in three dimensions, enabling the construction of nanowire architectures that may function as active photonic devices. Moreover, nanowire structures can now be assembled in physiological environments, offering new forms of chemical, mechanical and optical stimulation of living cells.