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Gold Nanoparticles: Fluorescence of Colloidal Gold Nanoparticles is Controlled by the Surface Adsorbate (Adv. Funct. Mater. 9/2012)
Author(s) -
Goldys Ewa M.,
Sobhan Mushtaq A.
Publication year - 2012
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201290055
Subject(s) - colloidal gold , materials science , nanoparticle , gold colloid , fluorescence , surface (topology) , nanotechnology , colloid , excitation , optics , chemical engineering , geometry , physics , engineering , mathematics , electrical engineering
The image shows three gold nanoparticles with varying levels of surface adsorbate (shown as brown patches on nanoparticle surface) but that are otherwise identical. Both the excitation and emission spectra shift as a result; this is indicated by varying colors of exciting laser beams and simultaneously varying colors of nanoparticle fluorescence. The article by Ewa M. Goldys and Mushtaq A. Sobhan on page 1906 explains the microscopic mechanism behind this observation.