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 language | English |
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Pages (from-to) | 2228-2232 |
Number of pages | 5 |
Journal | Journal of Physical Chemistry Letters |
Volume | 1 |
Issue number | 15 |
DOIs | |
Publication status | Published - 5 Aug 2010 |