Multi-mode enhanced Raman scattering spectroscopy using aggregation-free hybrid metal/metal-oxide nanoparticles with intrinsic oxygen vacancies

Abstract

Surface-enhanced Raman scattering (SERS) spectroscopy, with strong and stable signals, was achieved in aqueous solution using colloidal hybrid nanoparticles, consisting of gold nanotriangles (Au NTs) with a nanoscale coating of...

Efficient multiplexed label-free detection by flexible MXene/graphene oxide fibers with enhanced charge transfer and hot spots effect

“…Interestingly, although CTAB-capped AgNPs seem to form a denser film on the surface of MG-Ox fiber, the resultant SERS substrate exhibits a lower sensitivity for R6G molecules, compared to PVP-capped AgNPs (Table S3). This observation can be rationalized by the presence of compact bilayer supramolecular structure of CTAB that hinders the approach of R6G molecules to the surface of Ag NPs, thus affecting the photo-induced charge transfer (PICT) between MXene and the analytes [33,48,49]. Therefore, MG/AgNPs-PVP fiber is considered to be the optimal sample for building the highperformance flexible SERS substrate, where the MXenen nanosheets within the MG fiber could provide an additional signal enhancement of approximately 10 2 by PICT apart from the EM enhancement from the AgNPs nanostructures.…”

Fabrication of nanostructured electrodes for electrochemical surface-enhanced Raman spectroscopy (E-SERS): A review

“…For example, coating a plasmonic metal in a dielectric material can improve the stability of the NPs [125,126] and coating an inexpensive carrier with a noble metal can reduce the cost of plasmonic NPs [127]. Additionally, certain hybrid particles, such as gold core-silver shell NPs and plasmonic metal-semiconductor NPs, can exhibit charge transfer between the two materials which can lead to boosted SERS enhancements [30,67,[128][129][130][131][132][133][134][135][136].…”