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Effects of Rare-Gas Matrices on the Optical Response of Silver Nanoclusters

Abstract : The optical response of silver clusters, Agn with n = 8, 20, 35, 58, 92, embedded in a rare-gas matrix are calculated in the framework of the Time-Dependent Density Functional Theory (TDDFT). We present a methodology able to reproduce with unprecedented accuracy the experimental spectra measured on metal clusters embedded in neon, argon, krypton and xenon solid matrices. In our approach, the metal cluster is surrounded by explicit rare-gas atoms and embedded in a polarizable continuum medium. Interactions with the surrounding medium affects both the position and the width of the surface plasmon absorption band of metal clusters. The size dependent shift of the surface plasmon band is evaluated in the case of a neon matrix. While the band shifts to lower energies (red shift) for large clusters, it shifts to higher energies (blue shift) for very small clusters.
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R. Schira, Franck Rabilloud. Effects of Rare-Gas Matrices on the Optical Response of Silver Nanoclusters. Journal of Physical Chemistry C, American Chemical Society, 2018, 122, pp.27656-27661. ⟨10.1021/acs.jpcc.8b10388⟩. ⟨hal-02289870⟩

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