Self-assembled free-standing colloidal crystals

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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

30 Scopus citations


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.

Original languageEnglish
Pages (from-to)1440-1444
Number of pages5
Issue number9
StatePublished - 1 Sep 2005

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