Fabrication of large-area colloidal crystals by electrophoretic deposition in vertical arrangement

Yi Jui Huang*, Chun Han Lai, Pu-Wei Wu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

Fabrication of large-area colloidal crystals (400 μ m2) with superb uniformity in multiple layers (∼128 layers) from Si O2 microspheres (∼400 nm) was achieved by electrophoresis in vertical arrangement. With a large difference in electrode areas and selection of ethanol as the solvent, we investigated self-assembly with Si O2 suspensions at various pH and electric fields of 20-100 V cm-1. Colloid formations with negligible vacancies and small-angle grain boundaries were obtained at a suspension of pH≈10 and electric field of 20 V cm-1. Our fabrication scheme enables construction of colloidal crystals with significantly reduced structural disorders as compared to conventional routes.

Original languageEnglish
JournalElectrochemical and Solid-State Letters
Volume11
Issue number12
DOIs
StatePublished - 3 Nov 2008

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