Design of Gold nanorods Janus membrane for efficient and high-sensitive surface-enhanced Raman scattering and tunable surface plasmon resonance

Abstract Gold nanorods (GNRs) Janus membranes have been synthesized with thiol-terminated polyethylene glycol (PEG-SH) and thiol-terminated polystyrene (PS-SH) at the oil/water interface by modified self-assembly strategy. Compared with conventional GNRs membrane, these membranes exhibit significant surface plasmon resonance (SPR) peaks and an obvious blue shift with the addition of PEG-SH or PS-SH. Moreover, the Surface-enhanced Raman scattering (SERS) performance and reproducibility of the GNRs Janus membranes have been improved significantly. This indicates GNRs Janus membranes have great application prospects in optical applications such as science-based optical sensor design and SERS sensitive detection.