Document Detail


Plasmon Dynamics in Colloidal Au2Cd Alloy-CdSe Core/shell Nanocrystals.
MedLine Citation:
PMID:  23293834     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Metal-semiconductor nanocrystal heterostructures are model systems for understanding the interplay between the localized surface plasmon resonances in the metal domain and the relaxation of the excited carriers in the semiconductor domain. Here we report the synthesis of colloidal Au2Cd (core)/CdSe (shell) nanocrystal heterostructures, which were characterized extensively with several structural and optical techniques, including time-resolved fluorescence and broadband transient absorption spectroscopy (both below and above the CdSe bandgap). The dynamics of the transient plasmon peak was dominated by the relaxation of hot carriers in the metal core, its spectral shape was independent on the pump wavelength and the bleaching lifetime was about half a picosecond, comparable with the value found in the AuCd seeds used for the synthesis.
Authors:
Pablo Guardia; Kseniya Korobchevskaya; Alberto Casu; Alessandro Genovese; Liberato Manna; Alberto Comin
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-1-8
Journal Detail:
Title:  ACS nano     Volume:  -     ISSN:  1936-086X     ISO Abbreviation:  ACS Nano     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-1-8     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101313589     Medline TA:  ACS Nano     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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