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Using ATTO Dyes To Probe the Photocatalytic Activity of Au-CdS Nanoparticles

TitleUsing ATTO Dyes To Probe the Photocatalytic Activity of Au-CdS Nanoparticles
Publication TypeJournal Article
Year of Publication2017
AuthorsBhattacharjee, U, Men, L, Rosales, BA, Alvarado, SR, Vela, J, Petrich, JW
JournalJournal of Physical Chemistry C
Date Published01
Type of ArticleArticle
ISBN Number1932-7447
Accession NumberWOS:000392035500071
Keywordschemistry, cyclic voltammetry, gold, h-2 generation, hot-electron transfer, Materials Science, nanocrystals, nanoparticles, nanorod heterostructures, nanorods, photoinduced charge separation, quantum dots, semiconductor, Technology - Other Topics, visible-light

wavelengths shorter or longer than 500 nm, respectively, thus making possible an excited-state charge transfer reaction from ATTO. Fluorescence quenching of ATTO is dominated by charge transfer to either the CdS domain (lambda(ex) = 400 nm) or the Au domain (lambda(ex) = 570 nm). This quenching is quantified by steady-state and time-resolved absorption and fluorescence measurements, and its assignment is confirmed by electrochemical measurements. The results indicate that the ATTO dyes are sensitive and useful probes for measuring the photocatalytic activity of nanoparticles. Characterizing the nonradiative processes of the ATTO dyes in the presence of these catalytically active particles provides a means of gauging their utility in the wide range of spectroscopies in which they are employed.

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Alternate JournalJ. Phys. Chem. C