One-dimensional plasmonic hotspots located between silver nanowire dimers evaluated by surface-enhanced resonance Raman scattering

TL;DR

This paper demonstrates that plasmonic hotspots in silver nanowire dimers can be extended in one dimension by a factor of tens of thousands compared to traditional zero-dimensional hotspots, enhancing surface-enhanced resonance Raman scattering.

Contribution

It introduces a novel type of one-dimensional plasmonic hotspot in nanowire dimers, expanding the spatial extent of SERRS hotspots beyond conventional zero-dimensional ones.

Findings

One-dimensional hotspots are tens of thousands times larger than zero-dimensional hotspots.

Enhanced SERRS signals are achieved due to extended hotspot volume.

The study provides a new approach for designing plasmonic structures for sensing.

Abstract

Hotspots of surface-enhanced resonance Raman scattering (SERRS) are localized within 1 nm at gaps or crevices of plasmonic nanoparticle (NP) dimers. We demonstrate SERRS hotspots with volumes that are extended in one dimension tens of thousand times compared to standard zero-dimensional hotspots using gaps or crevices of plasmonic nanowire (NW) dimers.