-A A +A
In this work we study the potential of silica nanowires (NWs) decorated with Au nanoparticles (NPs) as novel optical platform for plasmonic biosensing. These composite materials combine the high white-light scattering of silica NWs with the selective absorption of the localized surface plasmon resonances (LSPRs) of the metal NPs, generating efficient light trapping just at the LSPR wavelengths. In addition, the NWs offer a macroporous framework for a three-dimensional (3D) distribution of the Au NPs, easily accessible by biomolecules. These optical and morphological pecularities, make the decoration of silica NWs with metal NPs a promising strategy for improved plasmonic biosensing. We fabricated silica NWs by thermal oxidation of silicon (Si) NWs, grown by plasma enhanced chemical vapor deposition (PECVD). The silica NWs were decorated with Au NPs by evaporating and then de-wetting via thermal …
Publication date: 
1 Apr 2016
Biblio References: 
Volume: 226 Pages: 589-597
Sensors and Actuators B: Chemical