期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 255, 期 -, 页码 290-298出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2017.08.043
关键词
Tungsten oxide quantum dots; Size-controlled synthesis; Ferric ions detection; Bioimaging
资金
- National Natural Science Foundation of China [51402207, 21571067, 51372091, 21401028, 61675072]
- Guangzhou Science & Technology Project [201605030005]
- Science and Technology Planning Project of Guangdong Province [2014A010105035, 20158090903074]
As one typical semiconductor material, tungsten oxide (WO3) has captivated intensive attention owing to its multifunctional properties. However, exploring a facile and one-pot strategy for controllable synthesis of fluorescent tungsten oxide quantum dots (WO3 QDs) is still very challenging. In this paper, WO3 QDs were prepared via a facile and one-pot ethanol-thermal approach in the presence of H2O2, and the growth mechanism was investigated in detail. Encouragingly, as evidenced by the transmission electron microscope and the atomic force microscope, the average size and topographic height of WO3 QDs were adjusted ranging from 23.5 to 2.3 nm and 21.3 to 2.2 nm via ethanol-thermal treatment with different amount of H2O2. The as-prepared WO3 QDs exhibited excellent water-solubility, highly fluorescence stability, low toxicity and good biocompatibility, resulting in their successful applications in specific ferric ions detection and bioimaging in vitro. Furthermore, this significant strategy would pave the way for the controllable fabrication of other transition metal oxides. (C) 2017 Elsevier B.V. All rights reserved.
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