Effect of crystallinity on the optical reflectance of cylindrical colloidal crystals

Chun Han Lai*, Yu Lin Yang, Li Yin Chen, Yi Jui Huang, Jing Yu Chen, Pu Wei Wu, Yu Ting Cheng, Yang Tung Huang

*Corresponding author for this work

Research output: Contribution to journalArticle

9 Scopus citations

Abstract

We fabricate cylindrical colloidal crystals (CCCs) via electrophoretic depositions of polystyrene microspheres on a carbon fiber in a concentric arrangement. Images from optical and scanning electron microscope indicate that the CCCs of 460 nm microspheres reveal a semicrystalline structure in close-packed lattice, while the CCCs of 660 exhibit an amorphous arrangement. In optical reflectance spectra, both CCCs demonstrate a dispersive photonic bandgap as compared to that from planar counterparts. The curved contour for the CCCs renders incident light interacting with reflecting planes at slightly different angles, leading to a notable reduction in the reflectance intensity and minor relocation of photonic bandgap contingent on their crystallinity.

Original languageEnglish
JournalJournal of the Electrochemical Society
Volume158
Issue number3
DOIs
StatePublished - 8 Feb 2011

Fingerprint Dive into the research topics of 'Effect of crystallinity on the optical reflectance of cylindrical colloidal crystals'. Together they form a unique fingerprint.

  • Cite this