Wu Yuchen, Feng Jiangang, Jiang Xiangyu, Zhang Zhen, Wang Xuedong, Su Bin, Jiang Lei
Beijing National Laboratory for Molecular Science (BNLMS), Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China.
1] Beijing National Laboratory for Molecular Science (BNLMS), Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China [2] School of Chemistry and Environment, Beihang University, Beijing 100191, P. R. China.
Nat Commun. 2015 Mar 27;6:6737. doi: 10.1038/ncomms7737.
Organic single-crystal, one-dimensional materials can effectively carry charges and/or excitons due to their highly ordered molecule packing, minimized defects and eliminated grain boundaries. Controlling the alignment/position of organic single-crystal one-dimensional architectures would allow on-demand photon/electron transport, which is a prerequisite in waveguides and other optoelectronic applications. Here we report a guided physical vapour transport technique to control the growth, alignment and positioning of organic single-crystal wires with the guidance of pillar-structured substrates. Submicrometre-wide, hundreds of micrometres long, highly aligned, organic single-crystal wire arrays are generated. Furthermore, these organic single-crystal wires can be joined within controlled angles by varying the pillar geometries. Owing to the controllable growth of organic single-crystal one-dimensional architectures, we can present proof-of-principle demonstrations utilizing joined wires to allow optical waveguide through small radii of curvature (internal angles of ~90-120°). Our methodology may open a route to control the growth of organic single-crystal one-dimensional materials with potential applications in optoelectronics.
有机单晶一维材料由于其高度有序的分子堆积、最小化的缺陷和消除的晶界，能够有效地传导电荷和/或激子。控制有机单晶一维结构的排列/位置将实现按需光子/电子传输，这是波导和其他光电子应用的先决条件。在此，我们报告一种引导物理气相传输技术，以在柱状结构衬底的引导下控制有机单晶线的生长、排列和定位。生成了亚微米宽、数百微米长、高度排列的有机单晶线阵列。此外，通过改变柱状几何形状，这些有机单晶线可以以可控角度连接。由于有机单晶一维结构的可控生长，我们可以展示利用连接的线实现通过小曲率半径（内角约为90 - 120°）的光波导的原理验证演示。我们的方法可能为控制有机单晶一维材料的生长开辟一条途径，这些材料在光电子学中具有潜在应用。
