TY - JOUR
T1 - Electric-Field Tuning of the Bragg Peak in Large-Pore TiO2 Inverse Shell Opals
AU - Graugnard, Elton
AU - King, J. S.
AU - Jain, S.
AU - Summers, C. J.
AU - Zhang-Williams, Y.
AU - Khoo, I. C.
PY - 2005/12/13
Y1 - 2005/12/13
N2 - 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 20 nm shift of the Bragg peak was observed for an applied electric field of 50 kV∕cm.
AB - 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 20 nm shift of the Bragg peak was observed for an applied electric field of 50 kV∕cm.
UR - http://www.scopus.com/inward/record.url?scp=29744434706&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.72.233105
DO - 10.1103/PhysRevB.72.233105
M3 - Article
SN - 1098-0121
VL - 72
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 23
M1 - 233105
ER -