info:eu-repo/semantics/article
Effect of molecular adsorbates on the plasmon resonance of metallic nanoparticles
Fecha
2010-02Registro en:
Negre, Christian Francisco Andres; Sanchez, Cristian Gabriel; Effect of molecular adsorbates on the plasmon resonance of metallic nanoparticles; Elsevier Science; Chemical Physics Letters; 494; 4-6; 2-2010; 255-259
0009-2614
CONICET Digital
CONICET
Autor
Negre, Christian Francisco Andres
Sanchez, Cristian Gabriel
Resumen
From a simple time-dependent tight-binding model we calculate the influence of molecular adsorbates on absorption spectra of spherical metallic nanoparticles. The model allows arbitrary coupling to the surface as well as changing the molecular excitation characteristics through its HOMO-LUMO gap. Adsorbates cause shifting and widening of the plasmon resonance peak for small coupling and even splitting of the resonance in two different excitations located on the particle surface and the adsorbate layer, respectively, for strong couplings.