A review of surface Plasmon resonance-enhanced photocatalysis. Plasmonic metal-semiconductor photocatalysts and photoelectrochemical cells: A review. Unusual circularly polarized photocatalytic activity in nanogapped gold-silver chiroplasmonic nanostructures. Plasmonics: Merging photonics and electronics at nanoscale dimensions. Chiral guanosine 5′-monophosphate-capped gold nanoflowers: Controllable synthesis, characterization, surface-enhanced Raman scattering activity, cellular imaging and photothermal therapy. Noble metals on the nanoscale: Optical and photothermal properties and some applications in imaging, sensing, biology, and medicine. Gold and silver nanoparticles in sensing and imaging: Sensitivity of Plasmon response to size, shape, and metal composition. This work has offered a facile route to synthesize plasmonic metal NPs with LSPR band in 650 to 800 nm that show strong enhancement of localized electromagnetic field, which provides an effective SERS substrate for SERS imaging and detection in biological fluids and tissues. Additionally, the spiky core-shell NPs exhibit improved surface-enhanced Raman scattering (SERS) activity as compared to the bare spiky Au NPs and spherical NPs. The LSPR bands of such spiky core-shell NPs resemble those of pure spiky Au NP cores of similar sizes in near-infrared region, and increasing the Ag shell thickness results in a blue shift and broadening of the LSPR band in the near-infrared region. The gradual assembly of small Au nanocrystals allows the size of spiky Au NPs to be modulated from tens to several hundreds of nanometers by tuning the concentration of initial Au seeds and Au source and the thickness of the Ag shell can be adjusted with stepwise reduction of Ag(I) ions. A facile synthetic approach has been developed to prepare uniform and size-tunable spiky core-shell nanoparticles (NPs) to tailor the localized surface plasmon resonance (LSPR) properties.
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