Photoinduced Micropattern Alignment of Semiconductor Nanorods with Polarized Emission in a Liquid Crystal Polymer Matrix

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review

19 Scopus Citations
View graph of relations

Author(s)

  • Wanlong Zhang
  • Abhishek K. Srivastava
  • Vladimir G. Chigrinov
  • Hoi-Sing Kwok

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)3133-3138
Journal / PublicationNano Letters
Volume17
Issue number5
Early online date10 Apr 2017
Publication statusPublished - 10 May 2017

Abstract

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 μm. 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.

Research Area(s)

  • liquid crystal polymer, Nanorods, patterns, photoalignment, polarized emission

Citation Format(s)

Photoinduced Micropattern Alignment of Semiconductor Nanorods with Polarized Emission in a Liquid Crystal Polymer Matrix. / Schneider, Julian; Zhang, Wanlong; Srivastava, Abhishek K.; Chigrinov, Vladimir G.; Kwok, Hoi-Sing; Rogach, Andrey L.

In: Nano Letters, Vol. 17, No. 5, 10.05.2017, p. 3133-3138.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review