modification and sers optimization of triangular ag nanoplates

Triangular ag nanoplates have been synthesized via the seed-mediated method, which has good morphology and can be reproduced stably. the wavelength of local surface plasmon resonance (lspr) can be easily controlled in the range of 500–900 nm. when triangular ag nanoplates were applied to surface-enhanced raman scattering (sers) based on suspension aggregates and solid aggregates, the detection limit of rhodamine 6g (r6g) were greatly increased to 3.125 × 10−7 m and 10−11 m, respectively, and there was an excellent linear relationship between the intensity of raman peak and the concentration of r6g. in addition, when the excitation light was tuned to the lspr wavelength, the surface plasmon resonance will be excited to the maximum extent, and the enhanced electromagnetic field will maximize the raman scattering. furthermore, some progress has been made in the optimization of sers by compounding graphene hydrogels in solid aggregates and adding mercapto polyethylene glycol in suspension aggregates.