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Ngoc, Loan Le Thi
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- 2021TiO2 Inverse Opals Modified by Ag Nanoparticles: A Synergic Effect of Enhanced Visible-Light Absorption and Efficient Charge Separation for Visible-Light Photocatalysiscitations
- 2014The contribution of plasmon-enhanced photoluminescence to the SERS backgroundcitations
- 2013Large area metal nanowire arrays with submicron pitch and tunable sub-20 nm nanogaps
- 2013Large area metal nanowire arrays with tunable sub-20nm nanogapscitations
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document
The contribution of plasmon-enhanced photoluminescence to the SERS background
Abstract
We report single-photon plasmon-enhanced photoluminescence from nanostructured gold surfaces by controlling the extent of the spectral overlaps of the excitation energy hωo, the surface plasmon resonance band (with peak resonance energy hωSPR), and the critical points ΔX and ΔL, of the joint density of states of the d and sp bands, near the X- and Lsymmetry points of the electronic band structure, respectively. For hωo~ΔX (hωo<ΔX), the peak photoluminescence intensity is strongly enhanced for a strong spectral overlap of hωo~hωSPR, and weakly enhanced for a weak spectral overlap. We show that the background continuum accompanying surface-enhanced Raman scattering (SERS) spectra from benzenethiol and 4-mercaptopyridine self-assembled monolayers chemisorbed on the nanostructured gold surfaces originates from plasmon-enhanced photoluminescence. The background continuum from silver nanostructures exhibits very different characteristics, which originates from SERS of oxide and amorphous carbon on silver surfaces. © (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only