Journal of Materials Research

Articles

Fabrication and optical characterizations of gold nanoshell opal

Jin Hyoung Leea1, Qi Wua1 and Wounjhang Parka1 c1

a1 Department of Electrical and Computer Engineering, University of Colorado, Boulder, Colorado 80309

Abstract

We fabricated three-dimensional photonic crystals by self-assembling gold nanoshells via forced sedimentation method. Gold nanoshells with a diameter of 458 nm (418-nm silica core and 20-nm gold shell) were synthesized and self-assembled into a 5-μm-thick opal structure. We observed reflection peaks at 710 and 1240 nm, which are believed to be from the complete three-dimensional photonic band gap and the (111) directional gap, respectively. Theses results were in good agreement with the photonic band-structure calculations done by the finite-difference time-domain method. Angle-resolved reflectivity measurements were also performed to investigate the existence of the complete three-dimensional photonic band gap.

(Received April 10 2006)

(Accepted September 13 2006)

(Online publication March 03 2011)

Key Words:

  • Core/shell;
  • Nanostructure;
  • Self-assembly

Correspondence:

c1 Address all correspondence to this author. e-mail: won.park@colorado.edu

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