Electric-field tuning of the Bragg peak in large-pore TiO2 inverse shell opals

E. Graugnard, J. S. King, S. Jain, C. J. Summers, Y. Zhang-Williams, I. C. Khoo

Research output: Contribution to journalArticle

73 Citations (Scopus)

Abstract

Inverse opals with large connection pores were fabricated by infiltrating sintered polystyrene opal templates using low-temperature atomic layer deposition of TiO2 and subsequently dissolving the polystyrene in toluene. The dielectric lattice, consisting of overlapping air spheres in a TiO2 matrix, was then infiltrated with nematic liquid crystal, with some samples having received a prior hydrophobic surface treatment. The specular reflectance is shown to depend not only on electric-field amplitude, but also on film structure. In the hydrophobic-treated sample, a 20nm shift of the Bragg peak was observed for an applied electric field of 50kV/cm.

Original languageEnglish (US)
Article number233105
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume72
Issue number23
DOIs
StatePublished - Dec 15 2005

Fingerprint

Polystyrenes
polystyrene
Tuning
tuning
Electric fields
porosity
electric fields
Atomic layer deposition
Nematic liquid crystals
Toluene
atomic layer epitaxy
surface treatment
Surface treatment
toluene
dissolving
templates
liquid crystals
reflectance
shift
air

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Graugnard, E. ; King, J. S. ; Jain, S. ; Summers, C. J. ; Zhang-Williams, Y. ; Khoo, I. C. / Electric-field tuning of the Bragg peak in large-pore TiO2 inverse shell opals. In: Physical Review B - Condensed Matter and Materials Physics. 2005 ; Vol. 72, No. 23.
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Electric-field tuning of the Bragg peak in large-pore TiO2 inverse shell opals. / Graugnard, E.; King, J. S.; Jain, S.; Summers, C. J.; Zhang-Williams, Y.; Khoo, I. C.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 72, No. 23, 233105, 15.12.2005.

Research output: Contribution to journalArticle

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