Widely tuning optical properties of nanoporous gold-titania core-shells
Abstract
Widely shifting localized surface plasmon resonance (LSPR) bands of nanoporous metals is essential for light manipulation within small volumes. In this work, nanoporous gold-titania core-shells fabricated by atomic layer deposition exhibit tunable LSPR of gold skeletons in comparison with nanoporous gold-alumina developed before. Extremely large red-shift of LSPR band in nanoporous gold-titania from 537 to 751 nm results from high refractive index of titania and its dielectric medium dependence of LSPR, and the well-controlled thickness of titania shell at the nanometer scale will benefit to integrate optical nanodevices with supreme performances.
- Publication:
-
Journal of Chemical Physics
- Pub Date:
- January 2011
- DOI:
- 10.1063/1.3523644
- Bibcode:
- 2011JChPh.134a4707Q
- Keywords:
-
- atomic layer deposition;
- gold;
- nanofabrication;
- nanoporous materials;
- red shift;
- refractive index;
- surface plasmon resonance;
- titanium compounds;
- 81.16.-c;
- 68.65.-k;
- 78.20.Ci;
- 73.22.Lp;
- 61.43.Gt;
- 61.46.-w;
- Methods of nanofabrication and processing;
- Low-dimensional mesoscopic and nanoscale systems: structure and nonelectronic properties;
- Optical constants;
- Collective excitations;
- Powders porous materials;
- Nanoscale materials