Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208-3108, USA.
ACS Nano. 2010 Mar 23;4(3):1630-6. doi: 10.1021/nn901567z.
Vertical nanowire arrays were prepared from an organic dye compound, 1,5-diaminoanthraquinone (DAAQ), on various types of substrates by a facile physical vapor transport method. It was found that the DAAQ grows much faster on the substrates with higher surface energies. Therefore, patterned growth of the nanowire arrays was achieved by modifying the substrate surfaces both geometrically and chemically to induce selective growth in areas of higher surface energies. The DAAQ nanowires can serve as nanosized active optical waveguides that allow the locally excited photoluminescence to propagate along the length of the wires. The low-loss waveguide propagation modes along the nanowire were observed experimentally. The nanowire arrays can be integrated directly with a portable fiber optics spectrometer for chemical vapor sensing.
通过简单的物理气相传输法，在各种基底上从有机染料化合物 1,5-二氨基蒽醌（DAAQ）制备垂直纳米线阵列。研究发现，DAAQ 在表面能较高的基底上生长得更快。因此，通过对基底表面进行几何和化学修饰，诱导在表面能较高的区域选择性生长，实现了纳米线阵列的图案化生长。DAAQ 纳米线可用作纳米级活性光学波导，允许局部激发的光致发光沿着纳米线的长度传播。实验中观察到沿纳米线的低损耗波导传播模式。纳米线阵列可以与便携式光纤光谱仪直接集成，用于化学气相传感。
