Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, People's Republic of China.
ACS Nano. 2012 Oct 23;6(10):9005-12. doi: 10.1021/nn303098n. Epub 2012 Sep 20.
The nanotechnology world is being more and more attracted toward high aspect ratio one-dimensional nanostructures due to their potentials as building blocks for electronic/optical devices. Here, we propose a novel method to generate nanowire patterns with assistance of superhydrophobic flexible polydimethylsiloxane (PDMS) substrates. Micropillar gaps are tunable via a stretching process of the PDMS surface; thus, diverse nanowire patterns can be formed by stretching the same PDMS surface in various ways. Importantly, square nanowire loops with alternative compositions can be generated through a double-stretching process, showing an advanced methodology in controlling the alignment of nanowires. Since alternative fluorescent molecules will be quenched by diverse chemical substances, this alternative nanowire loop shows a selective detection for diverse target compounds, which greatly improves the application of this nanowire patterning approach. Furthermore, such alternative nanowire patterns can be transferred from pillar-structured surfaces to flat films, indicating further potentials in microcircuits, sensitive sensors, and other organic functional nanodevices.
由于高纵横比一维纳米结构在电子/光学器件中具有作为构建块的潜力，因此纳米技术领域越来越受到关注。在这里，我们提出了一种使用超疏水柔性聚二甲基硅氧烷（PDMS）基底生成纳米线图案的新方法。通过 PDMS 表面的拉伸过程可以调节微柱间隙，因此通过以不同的方式拉伸相同的 PDMS 表面可以形成各种纳米线图案。重要的是，通过双拉伸过程可以生成具有交替组成的方形纳米线环，这展示了一种在控制纳米线排列方面的先进方法。由于交替的荧光分子会被不同的化学物质猝灭，因此这种交替的纳米线环可以对不同的目标化合物进行选择性检测，这大大提高了这种纳米线图案化方法的应用。此外，这种交替的纳米线图案可以从柱状结构表面转移到平面薄膜上，这表明其在微电路、敏感传感器和其他有机功能纳米器件中有进一步的应用潜力。
