In situ electrochemical regeneration of nanogap hotspots for continuously reusable ultrathin SERS sensors
University of Cambridge · Kangwon National University
Abstract
Abstract Surface-enhanced Raman spectroscopy (SERS) harnesses the confinement of light into metallic nanoscale hotspots to achieve highly sensitive label-free molecular detection that can be applied for a broad range of sensing applications. However, challenges related to irreversible analyte binding, substrate reproducibility, fouling, and degradation hinder its widespread adoption. Here we show how in-situ electrochemical regeneration can rapidly and precisely reform the nanogap hotspots to enable the continuous reuse of gold nanoparticle monolayers for SERS. Applying an oxidising potential of +1.5 V (vs Ag/AgCl) for 10 s strips a broad range of adsorbates from the nanogaps and forms a metastable oxide layer…
Citation impact
- FWCI
- 11.90
- Percentile
- 100%
- References
- 70
Authors
9Topics & keywords
- Materials science
- Nanotechnology
- Surface-enhanced Raman spectroscopy
- Plasmon
- In situ
- Raman spectroscopy
- Analyte
- Nanoscopic scale
- Life in Land