Journal
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
Volume 52, Issue 18, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1361-6455/
Keywords
density functional theory; nanoparticles; charge polarization
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Funding
- Deutsche Forschungsgemeinschaft (DFG) [Sfb 652]
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The interaction within a hybrid system consisting of a spherical metal nanoparticle (NP) and a nearby organic dye molecule is formulated in a combined quantum-classical approach. Whereas the NP's polarization field is treated in classical multipole form, the electronic charge density of the molecule is described quantum mechanically. An efficient solution of the resulting self-consistency problem becomes possible by using the discrete representation of the charge density in terms of atom-centered Mulliken charges within the density functional theory-based tight binding approach. Results for two different dye molecules are presented, which focus on the dependence of the interaction on the NP's radius, the distance between NP and molecule and their mutual orientation.
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