期刊
NANO LETTERS
卷 17, 期 5, 页码 3133-3138出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.7b00563
关键词
Nanorods; polarized emission; photoalignment; liquid crystal polymer; patterns
类别
资金
- ITF Grant from ITC Hong Kong government [ITS/370/16]
- Germany/Hong Kong Joint.Research Scheme - Research Grant Council of Hong Kong
- Germany Academic Exchange Service of Germany [G-CityU110/14]
Photoalignment technology provides high alignment quality with an exceptional control over the local director of liquid crystals. Because of the reorientation ability of sulfonic azo dye molecules, they offer high azimuthal and polar anchoring energy with a low pretilt angle for the orientation of liquid crystals and liquid crystal composites. In this work, we make use of this approach to align thin film composites of light-emitting semiconductor nanorods dispersed in a liquid crystal polymer into both one-dimensional and two-dimensional microscale patterns. After unidirectional alignment, the patterns are fabricated by a second irradiation with different polarization azimuth and the employment of a photomask. Fluorescence micrographs reveal the nanorod pattern alignment in domain sizes down to 2 mu m. Apart from demonstrating the possibility of controlling the orientation of anisotropic nanocrystals with strongly polarized emission on microscopic scale, our results are promising for the fabrication of complex nanostructures for photonic applications.
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