Self-consistent model of light-induced molecular motion around metallic nanostructures

Mathieu L. Juan, Jeírôme Plain*, Renaud Bachelot, Pascal Royer, Stephen K. Gray, Gary P. Wiederrecht

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

Azobenzene derivatives containing polymers deform when exposed to light with a wavelength in the principle absorption band associated with trans-cis isomerization of the azobenzene derivative molecule. When such polymers cover a metallic nanoparticle exposed to light near its surface plasmon resonance, which also happens to overlap with the azobenzene derivative absorption band, the resulting surface deformations are a novel measure or probe of the plasmonic near-field intensities. We developed a self-consistent model of the process by combining a Monte Carlo based model for the absorption and subsequent light-induced mass transport of the polymer with finite difference time domain computations of the electromagnetic fields around the nanoparticle that induce the absorption. The resulting self-consistent approach is shown to describe the key features of experimental observations concerning silver disk nanoparticles.

Original languageEnglish
Pages (from-to)2228-2232
Number of pages5
JournalJournal of Physical Chemistry Letters
Volume1
Issue number15
DOIs
Publication statusPublished - 5 Aug 2010

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