期刊
APPLIED SURFACE SCIENCE
卷 257, 期 16, 页码 7231-7237出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2011.03.097
关键词
Nanohybrids; Zinc oxide nanoparticles; Photoluminescence emission; Polymer nanocomposite; Laser fluence; Production rate
类别
资金
- German Research Foundation (DFG) [1327]
- ZFM - Center for Solid State Chemistry and New Materials, Leibniz University Hannover, Hannover, Germany
- Islamic Azad University, Central Tehran branch, Tehran, Iran
Nanocomposites made of ZnO nanoparticles dispersed in thermoplastic polyurethane were synthesized using picosecond laser ablation of zinc in a polymer-doped solution of tetrahydrofuran. The pre-added polymer stabilizes the ZnO nanoparticles in situ during laser ablation by forming a polymer shell around the nanoparticles. This close-contact polymer shell has a layer thickness up to 30 nm. Analysis of ZnO polyurethane nanocomposites using optical spectroscopy, high resolution transmission electron microscopy and X-ray diffraction revealed that oxidized and crystalline ZnO nanoparticles were produced. Those nanocomposites showed a green photoluminescence emission centred at 538nm after excitation at 350 nm, which should be attributed to oxygen defects generated during the laser formation mechanism of the monocrystalline nanoparticles. Further, the influence of pulse energy and polymer concentration on the production rate, laser fluence and energy-specific mass productivity was investigated. (C) 2011 Elsevier B.V. All rights reserved.
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