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Optical Materials Express

Optical Materials Express

  • Editor: David Hagan
  • Vol. 4, Iss. 4 — Apr. 1, 2014
  • pp: 681–688

Interplay between iridescent and non-iridescent coloration in bio-inspired electrically-tunable nanostructures

Supone Manakasettharn, Tsung-Hsing Hsu, J. Ashley Taylor, and Tom Krupenkin  »View Author Affiliations

Optical Materials Express, Vol. 4, Issue 4, pp. 681-688 (2014)

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This work is inspired by biological nanostructured surfaces possessing structural color generation and wettability control. Nanostructured films consisting of a tantalum pentoxide (Ta2O5) nanopost array (nanograss) formed on top of a continuous Ta2O5 layer on a reflective Ta thin-film have been fabricated and investigated. A non-iridescent coloration typical for short-range order was produced by the nanograss while iridescent coloration was produced by the underlying continuous Ta2O5 layer. When the nanograss surface is wetted with organic liquids, a different non-iridescent blue color appears. Moreover, this blue color can be dynamically and reversibly switched on and off by applying electrical current to an indium-tin-oxide electrode.

© 2014 Optical Society of America

OCIS Codes
(240.0240) Optics at surfaces : Optics at surfaces
(310.0310) Thin films : Thin films
(160.4236) Materials : Nanomaterials
(310.6628) Thin films : Subwavelength structures, nanostructures
(240.6648) Optics at surfaces : Surface dynamics

ToC Category:

Original Manuscript: November 19, 2013
Revised Manuscript: February 18, 2014
Manuscript Accepted: February 20, 2014
Published: March 12, 2014

Supone Manakasettharn, Tsung-Hsing Hsu, J. Ashley Taylor, and Tom Krupenkin, "Interplay between iridescent and non-iridescent coloration in bio-inspired electrically-tunable nanostructures," Opt. Mater. Express 4, 681-688 (2014)

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