Single-Particle Photoluminescence and Dark-Field Scattering during Charge Density Tuning

Emily K. Searles, Eric Gomez, Stephen Lee, Behnaz Ostovar, Stephan Link, Christy F. Landes

Research output: Contribution to journalArticlepeer-review


Single-particle spectroelectrochemistry provides optical insight into understanding physical and chemical changes occurring on the nanoscale. While changes in dark-field scattering during electrochemical charging are well understood, changes to the photoluminescence of plasmonic nanoparticles under similar conditions are less studied. Here, we use correlated single-particle photoluminescence and dark-field scattering to compare their plasmon modulation at applied potentials. We find that changes in the emission of a single gold nanorod during charge density tuning of intraband photoluminescence can be attributed to changes in the Purcell factor and absorption cross section. Finally, modulation of interband photoluminescence provides an additional constructive observable, giving promise for establishing dual channel sensing in spectroelectrochemical measurements.

Original languageEnglish (US)
Pages (from-to)318-325
Number of pages8
JournalJournal of Physical Chemistry Letters
Issue number2
StatePublished - Jan 19 2023
Externally publishedYes

ASJC Scopus subject areas

  • General Materials Science
  • Physical and Theoretical Chemistry


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