The self-assembly synthesis of tungsten oxide quantum dots with enhanced optical properties

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Detail(s)

Original languageEnglish
Pages (from-to)3280-3285
Journal / PublicationJournal of Materials Chemistry C
Volume3
Issue number14
Publication statusPublished - 14 Apr 2015

Abstract

In the present paper, a one-pot microwave-assisted approach was explored for self-assembly fabrication of ultrafine tungsten oxide (WO3) quantum dots (QDs). The as-obtained WO3 QDs were ultrafine, with a quantum size ranging from 2 to 3 nm. Such ultrafine WO3 QDs exhibited significant thermal/photonic stabilities, which are favorable for blue photoluminescence emission and photochromism properties. The WO3 QDs could be well maintained in ethylene glycol at 120 °C for 4 days, without the occurrence of aggregation phenomena. It took about 10 s for the colorless aqueous suspension of WO3 QDs to turn blue under solar-light irradiation. A negligible decrease rate (2.7%) was observed for the relative luminescence emission intensity of WO3 QDs after being irradiated by UV light (365 nm) for 24 hours. Such greatly enhanced photochromism was attributed to both the exposed reactive sites and surface oxygen vacancies of ultrafine WO3 QDs. This journal is

Citation Format(s)

The self-assembly synthesis of tungsten oxide quantum dots with enhanced optical properties. / Wang, Songling; Kershaw, Stephen V.; Li, Guisheng et al.
In: Journal of Materials Chemistry C, Vol. 3, No. 14, 14.04.2015, p. 3280-3285.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review