Self-assembled free-standing colloidal crystals

Authors: Chan, Chia-Hua; Chen, Chii-Chang; Huang, Chih-Kai; Weng, Wei-Hsiang; Wei, Hung-Sen; Chen, Hui; Lin, Hsiao-Tsung; Chang, Hsiang-Szu; Chen, Wen-Yen; Chang, Wen-Hao; Hsu, Tzu-Min

Source: Nanotechnology, Volume 16, Number 9, September 2005 , pp. 1440-1444(5)

Publisher: Institute of Physics Publishing

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Abstract:

We propose a novel technique to fabricate a free-standing three-dimensional colloidal crystal by self-assembling the colloidal microspheres with controllable thickness from the air–liquid interface. Highly ordered three-dimensional colloidal crystals are formed by polymethylmethacrylate or polystyrene monodisperse microspheres. We also demonstrate the fabrication technique of the free-standing inversed opals by removing the microspheres using calcination. The free-standing colloidal crystal structures can be used for nano-photonic circuits, white-light LEDs or as a photocatalyst.

Document Type: Research article

DOI: 10.1088/0957-4484/16/9/003

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