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Correlated Absorption and Photoluminescence of Single Gold Nanoparticles
Author(s) -
Gaiduk Alexander,
Yorulmaz Mustafa,
Orrit Michel
Publication year - 2011
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201100167
Subject(s) - photothermal therapy , fluorescence , photoluminescence , absorption (acoustics) , quantum yield , microscopy , nanoparticle , colloidal gold , fluorescence microscope , materials science , atomic force microscopy , nanotechnology , analytical chemistry (journal) , brightness , photochemistry , chemistry , optics , optoelectronics , physics , chromatography , composite material
We perform simultaneous absorption (photothermal) and fluorescence detection of gold nanospheres with diameters of 80, 60, 40, 20, 10, and 5 nm. We unambiguously identify the same individual nanoparticles (NPs) over large areas (>400 μm 2 ) by means of atomic force microscopy (AFM) and optical absorption (photothermal) microscopy. We correlate the height of NPs measured with AFM with absorption and fluorescence signals from the same individual NPs. That allows us to compare their brightness and estimate their fluorescence quantum yield at the single NP level.