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Kim, Kwang S.
Center for Superfunctional Materials (CSM)
Research Interests
  • Theoretical/experimental nanosciences, molecular electronics spectroscopy, energy materials

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Tunable photoluminescence across the visible spectrum and photocatalytic activity of mixed-valence rhenium oxide nanoparticles

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Title
Tunable photoluminescence across the visible spectrum and photocatalytic activity of mixed-valence rhenium oxide nanoparticles
Author
Jeong, Yong-KwangLee, Young MinYun, JeonghunMazur, TomaszKim, MinjuKim, Young JaeDygas, MiroslawChoi, Sun HeeKim, Kwang S.Kwon, Oh HoonYoon, Seok MinGrzybowski, Bartosz A.
Issue Date
2017-10
Publisher
AMER CHEMICAL SOC
Citation
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, v.139, no.42, pp.15088 - 15093
Abstract
Materials exhibiting excitation-wavelength-dependent photoluminescence, PL, are useful in a range of biomedical and optoelectronic applications. This paper describes a nanoparticulate material whose PL is tunable across the entire visible range and is achieved without adjusting particle size, any postsynthetic doping, or surface modification. A straightforward thermal decomposition of rhenium (VII) oxide precursor yields nanoparticles that comprise Re atoms at different oxidation states. Studies of time-resolved emission spectra and DFT calculations both indicate that tunable PL of such mixed-valence particles originates from the presence of multiple emissive states that become “active” at different excitation wavelengths. In addition, the nanoparticles exhibit photocatalytic activity that, under visible-light irradiation, is superior to that of TiO2 nanomaterials.
URI
https://scholarworks.unist.ac.kr/handle/201301/22941
URL
http://pubs.acs.org/doi/full/10.1021/jacs.7b07494
DOI
10.1021/jacs.7b07494
ISSN
0002-7863
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