Direct molecular-level near-field plasmon and temperature assessment in a single plasmonic hotspot.

ABSTRACT: Tip-enhanced Raman spectroscopy (TERS) is currently widely recognized as an essential but still emergent technique for exploring the nanoscale. However, our lack of comprehension of crucial parameters still limits its potential as a user-friendly analytical tool. The tip's surface plasmon resonance, heating due to near-field temperature rise, and spatial resolution are undoubtedly three challenging experimental parameters to unravel. However, they are also the most fundamentally relevant parameters to explore, because they ultimately influence the state of the investigated molecule and consequently the probed signal. Here we propose a straightforward and purely experimental method to access quantitative information of the plasmon resonance and near-field temperature experienced exclusively

SUBMITTER: Richard-Lacroix M 

PROVIDER: S-EPMC7061098 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature