Preparation and near-infrared photothermal conversion property of cesium tungsten oxide nanoparticles

Cheng Jia Chen, Dong Hwang Chen

研究成果: Article同行評審

34 引文 斯高帕斯(Scopus)

摘要

Cs0.33WO3 nanoparticles have been prepared successfully by a stirred bead milling process. By grinding micro-sized coarse powder with grinding beads of 50 μm in diameter, the mean hydrodynamic diameter of Cs0.33WO3 powder could be reduced to about 50 nm in 3 h, and a stable aqueous dispersion could be obtained at pH 8 via electrostatic repulsion mechanism. After grinding, the resulting Cs0.33WO3 nanoparticles retained the hexagonal structure and had no significant contaminants from grinding beads. Furthermore, they exhibited a strong characteristic absorption and an excellent photothermal conversion property in the near-infrared (NIR) region, owing to the free electrons or polarons. Also, the NIR absorption and photothermal conversion property became more significant with decreasing particle size or increasing particle concentration. When the concentration of Cs0.33WO3 nanoparticles was 0.08 wt.%, the solution temperature had a significant increase of above 30°C in 10 min under NIR irradiation (808 nm, 2.47 W/cm2). In addition, they had a photothermal conversion efficiency of about 73% and possessed excellent photothermal stability. Such an effective NIR absorption and photothermal conversion nanomaterial not only was useful in the NIR shielding, but also might find great potential in biomedical application.

原文English
文章編號57
頁(從 - 到)1-8
頁數8
期刊Nanoscale Research Letters
8
發行號1
DOIs
出版狀態Published - 2013

All Science Journal Classification (ASJC) codes

  • 材料科學(全部)
  • 凝聚態物理學

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