Plasmon-induced electrical conduction in molecular devices.
Abstract
Metal nanoparticles (NPs) respond to electromagnetic waves by creating surface plasmons
(SPs), which are localized, collective oscillations of conduction electrons on the
NP surface. When interparticle distances are small, SPs generated in neighboring NPs
can couple to one another, creating intense fields. The coupled particles can then
act as optical antennae capturing and refocusing light between them. Furthermore,
a molecule linking such NPs can be affected by these interactions as well. Here, we
show that by using an appropriate, highly conjugated multiporphyrin chromophoric wire
to couple gold NP arrays, plasmons can be used to control electrical properties. In
particular, we demonstrate that the magnitude of the observed photoconductivity of
covalently interconnected plasmon-coupled NPs can be tuned independently of the optical
characteristics of the molecule-a result that has significant implications for future
nanoscale optoelectronic devices.
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https://hdl.handle.net/10161/4102Published Version (Please cite this version)
10.1021/nn901148mPublication Info
Banerjee, Parag; Conklin, David; Nanayakkara, Sanjini; Park, Tae-Hong; Therien, Michael
J; & Bonnell, Dawn A (2010). Plasmon-induced electrical conduction in molecular devices. ACS Nano, 4(2). pp. 1019-1025. 10.1021/nn901148m. Retrieved from https://hdl.handle.net/10161/4102.This is constructed from limited available data and may be imprecise. To cite this
article, please review & use the official citation provided by the journal.
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Show full item recordScholars@Duke
Michael J. Therien
William R. Kenan, Jr. Distinguished Professor of Chemistry
Our research involves the synthesis of compounds, supramolecular assemblies, nano-scale
objects, and electronic materials with unusual ground-and excited-state characteristics,
and interrogating these structures using state-of-the-art transient optical, spectroscopic,
photophysical, and electrochemical methods. Over chemical dimensions that span molecules
to materials, we probe experimental and theoretical aspects of charge migration reactions
and ultrafast electron transfer processes. Insights

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