2,4,5-Triphenylimidazole Nanowires with Fluorescence Narrowing Spectra Prepared through the Adsorbent-Assisted Physical Vapor Deposition Method
2,4,5-Triphenylimidazole Nanowires with Fluorescence Narrowing Spectra Prepared through the Adsorbent-Assisted Physical Vapor Deposition Method
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DOI：
10.1021/cm060102
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发表时间：
2006-03
影响因子：
8.6
通讯作者：
Y. Zhao;Debao Xiao;Wensheng Yang;Andi Peng;J. Yao
中科院分区：
文献类型：
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作者：
Y. Zhao;Debao Xiao;Wensheng Yang;Andi Peng;J. Yao
采用吸附辅助物理气相沉积（PVD）方法，从有机功能小分子2，4，5-三苯基咪唑（TPI）制备了单晶纳米线。吸收剂的引入可以显著提高TPI纳米线的尺寸均匀性。TPI纳米线显示出有趣的尺寸依赖性的光学性质，即随着直径的减小，线的吸收光谱表现出明显的蓝移，同时，即使在室温下，随着直径从500到40 nm的减小，发射光谱的振动精细结构出现并变得更加明显，这通常仅在低温条件下观察到。振动结构的出现和增强是由于随着直径的减小，长程有序度和取向度的增加。该方法对纳米线的制备具有一定的启示作用。
The single crystalline nanowires have been fabricated from a small organic functional molecule, 2,4,5-triphenylimidazole (TPI), through an adsorbent-assisted physical vapor deposition (PVD) method. The introduction of the absorbents can significantly improve the dimensional uniformity of the as-prepared TPI nanowires. The TPI nanowires displayed interesting size-dependent optical properties, that is, the absorption spectra of the wires exhibit an obvious blue shift with the decrease of diameter, and simultaneously, the vibrational fine structures of the emission spectra emerge and become more pronounced with the diameter decreasing from 500 to 40 nm even at room temperature, which are usually observed only under cryogenic conditions. The emergence and enhancement of the vibrational structures are contributed to the increase of the long-range order and the degree of orientation with the decrease of diameter. The strategy described here should give a useful enlightenment for the fabrication of wirelike nano...