Record number :
Title of article :
Femtosecond dynamic final-state effect in photoemission of surface-passivated metallic nanoparticles on graphite substrates
Author/Authors :
Akinori Tanaka، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2004
Pages :
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Abstract :
We have carried out systematic photoemission studies of alkanethiolate- (AT-)passivated metallic (Ag and Au) nanoparticles supported on the highly oriented pyrolytic graphite (HOPG) substrates. The Fermi-level onsets in the photoemission spectra of AT-passivated Ag nanoparticles on the HOPG substrates are not the metallic Fermi-edge, and depend on the nanoparticle diameter and surface-passivant molecules. Furthermore, the core-level photoemission spectra also depend on the nanoparticle diameter.We attribute these unusual spectral features to the dynamic final-state effect in photoemission, indicative of the interaction between the nanoparticle and substrate through the surface-passivants on a femtosecond timescale
Keywords :
Surface-passivated metallic nanoparticle , Photoemission spectroscopy , Nanoparticle–substrateinteraction , Single-electron phenomena , Dynamic final-state effect
Journal title :
Applied Surface Science
Journal title :
Applied Surface Science
Serial Year :
Link To Document :