title: 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.
authors.affiliation: Nevada Nanotechnology Center, Howard R. Hughes College of Engineering, University of Nevada, Las Vegas, Nevada 89154-4026, USA.
authors.forename: Lihua
authors.initials: L
authors.lastname: Qian
authors.forename: Bo
authors.initials: B
authors.lastname: Shen
authors.forename: Gaowu W
authors.initials: GW
authors.lastname: Qin
authors.forename: Biswajit
authors.initials: B
authors.lastname: Das
mesh_terms: D006046:Gold / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry*; D055620:Optical Phenomena; D010316:Particle Size; D016062:Porosity; D020349:Surface Plasmon Resonance; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*
chemical_list: C009495:titanium dioxide; D006046:Gold; D014025:Titanium