In situ optical and structural studies on photoluminesence quenching in CdSe/CdS/Au heterostructures

Arnaud Demortière, Richard D Schaller, Tao Li, Soma Chattopadhyay, Galyna Krylova, Tomohiro Shibata, Paula C. Dos Santos Claro, Clare E. Rowland, Jeffrey T. Miller, Russell Cook, Byeongdu Lee, Elena V. Shevchenko

Research output: Contribution to journalArticle

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Abstract

We report here detailed in situ studies of nucleation and growth of Au on CdSe/CdS nanorods using synchrotron SAXS technique and time-resolved spectroscopy. We examine structural and optical properties of CdSe/CdS/Au heterostructures formed under UV illumination. We compare the results for CdSe/CdS/Au heterostructures with the results of control experiments on CdSe/CdS nanorods exposed to gold precursor under conditions when no such heterostructures are formed (no UV illumination). Our data indicate similar photoluminescence (PL) quenching and PL decay profiles in both types of samples. Via transient absorption and PL, we show that such behavior is consistent with rapid (faster than 3 ps) hole trapping by gold-sulfur sites at the surface of semiconductor nanoparticles. This dominant process was overlooked in previous end-point studies on semiconductor/metal heterostructures.

Original languageEnglish
Pages (from-to)2342-2350
Number of pages9
JournalJournal of the American Chemical Society
Volume136
Issue number6
DOIs
Publication statusPublished - Feb 12 2014

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Nanotubes
Lighting
Gold
Heterojunctions
Quenching
Quantum Dots
Photoluminescence
Semiconductors
Synchrotrons
Nanorods
Sulfur
Spectrum Analysis
Metals
Semiconductor materials
Growth
Structural properties
Nucleation
Optical properties
Spectroscopy
Nanoparticles

ASJC Scopus subject areas

  • Chemistry(all)
  • Catalysis
  • Biochemistry
  • Colloid and Surface Chemistry

Cite this

In situ optical and structural studies on photoluminesence quenching in CdSe/CdS/Au heterostructures. / Demortière, Arnaud; Schaller, Richard D; Li, Tao; Chattopadhyay, Soma; Krylova, Galyna; Shibata, Tomohiro; Dos Santos Claro, Paula C.; Rowland, Clare E.; Miller, Jeffrey T.; Cook, Russell; Lee, Byeongdu; Shevchenko, Elena V.

In: Journal of the American Chemical Society, Vol. 136, No. 6, 12.02.2014, p. 2342-2350.

Research output: Contribution to journalArticle

Demortière, A, Schaller, RD, Li, T, Chattopadhyay, S, Krylova, G, Shibata, T, Dos Santos Claro, PC, Rowland, CE, Miller, JT, Cook, R, Lee, B & Shevchenko, EV 2014, 'In situ optical and structural studies on photoluminesence quenching in CdSe/CdS/Au heterostructures', Journal of the American Chemical Society, vol. 136, no. 6, pp. 2342-2350. https://doi.org/10.1021/ja4092616
Demortière, Arnaud ; Schaller, Richard D ; Li, Tao ; Chattopadhyay, Soma ; Krylova, Galyna ; Shibata, Tomohiro ; Dos Santos Claro, Paula C. ; Rowland, Clare E. ; Miller, Jeffrey T. ; Cook, Russell ; Lee, Byeongdu ; Shevchenko, Elena V. / In situ optical and structural studies on photoluminesence quenching in CdSe/CdS/Au heterostructures. In: Journal of the American Chemical Society. 2014 ; Vol. 136, No. 6. pp. 2342-2350.
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