Electrical detection of plasmon-induced isomerization in molecule-nanoparticle network devices

Didier Stievenard, David Guerin, Stephane Lenfant, Gaetan Leveque, Christian A. Nijhuis, Dominique Vuillaume*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

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Abstract

We use a network of molecularly linked gold nanoparticles (NPSAN: nanoparticle self-assembled network) to demonstrate the electrical detection (conductance variation) of plasmon-induced isomerization (PII) of azobenzene derivatives (azobenzene bithiophene: AzBT). We show that PII is more efficient in a 3D-like NPSAN (cluster-NPSAN) than in a purely two-dimensional NPSAN (i.e., a monolayer of AzBT functionalized Au NPs). By comparison with the usual optical (UV-visible light) isomerization of AzBT, PII shows faster (a factor > ∼10) isomerization kinetics. Possible PII mechanisms are discussed: electric field-induced isomerization, two-phonon process, and plasmon-induced resonance energy transfer (PIRET), the latter being the most likely.
Original languageEnglish
Pages (from-to)23122-23130
JournalNanoscale
Volume10
Issue number48
DOIs
Publication statusPublished - 28 Dec 2018
Externally publishedYes

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