Active Control of Energy Transfer in Plasmonic Nanorod-Polyaniline Hybrids

Annette Jones, Emily K. Searles, Martin Mayer, Marisa Hoffmann, Niklas Gross, Hyuncheol Oh, Andreas Fery, Stephan Link, Christy F. Landes

Research output: Contribution to journalArticlepeer-review


The hybridization of plasmonic energy and charge donors with polymeric acceptors is a possible means to overcome fast internal relaxation that limits potential photocatalytic applications for plasmonic nanomaterials. Polyaniline (PANI) readily hybridizes onto gold nanorods (AuNRs) and has been used for the sensitive monitoring of local refractive index changes. Here, we use single-particle spectroscopy to quantify a previously unreported plasmon damping mechanism in AuNR-PANI hybrids while actively tuning the PANI chemical structure. By eliminating contributions from heterogeneous line width broadening and refractive index changes, we identify efficient resonance energy transfer (RET) between AuNRs and PANI. We find that RET dominates the optical response in our AuNR-PANI hybrids during the dynamic tuning of the spectral overlap of the AuNR donor and PANI acceptor. Harnessing RET between plasmonic nanomaterials and an affordable and processable polymer such as PANI offers an alternate mechanism toward efficient photocatalysis with plasmonic nanoparticle antennas.

Original languageEnglish (US)
Pages (from-to)8235-8243
Number of pages9
JournalJournal of Physical Chemistry Letters
Issue number36
StatePublished - Sep 14 2023

ASJC Scopus subject areas

  • General Materials Science
  • Physical and Theoretical Chemistry


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