Tunable photoluminescence across the visible spectrum and photocatalytic activity of mixed-valence rhenium oxide nanoparticles
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- Tunable photoluminescence across the visible spectrum and photocatalytic activity of mixed-valence rhenium oxide nanoparticles
- Jeong, Yong-Kwang; Lee, Young Min; Yun, Jeonghun; Mazur, Tomasz; Kim, Minju; Kim, Young Jae; Dygas, Miroslaw; Choi, Sun Hee; Kim, Kwang S.; Kwon, Oh Hoon; Yoon, Seok Min; Grzybowski, Bartosz A.
- Issue Date
- AMER CHEMICAL SOC
- JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, v.139, no.42, pp.15088 - 15093
- 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.
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