Abstract
The self-assembled lyche-like aggregates with ZnO nanoparticles were prepared via the hydrothermal method assisted by solvent (isopropanol)-evaporation in the present of the additives. The evaporation of the solvent was demonstrated to play a critical role on the formation of lyche-like aggregates of ZnO. The structures, morphologies and optical properties of as-prepared products were investigated by X-ray diffraction (XRD), Transmission Electron Microscope (TEM), Field Emission Scanning Electron Microscope (FESEM), Fourier Transformation Infrared spectra (FT-IR), Ultraviolet visible absorption spectra (UV-vis) and Photoluminescence spectra (PL). The results show that the increased steric effect among the ZnO nanoparticles constructs the lyche-like aggregates ultimately with the decreases of the solvent in the reaction system. The infrared emissivity value in 8–14 μm of ZnO nanoparticles is 0.922. Contrastively the emissivity value of the lyche-like ZnO aggregates slightly decreases to 0.915. It can be expected as an effective method for the formation of near-spherical structure of metal oxides nanoparticles aggregates. It may be used as an unique pigment in the field of low infrared emissivity coatings or other functional materials.
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Acknowledgements
This work was financially supported by the National Natural Science Foundation of China (Grant No. 61605027), the Natural Science Foundation of Fujian Province (Grant No. 2017H6001), the Natural Science Foundation of Fujian Province (Grant No. 2015H6006), the Science and Technology Bureau of Fuzhou (Grant No. 2015-G-57), the Fujian University of Technology Foundation (Grant No. GY-Z15100).
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Ye, X., Li, W., Lin, Y., Cai, S., Lin, Y. (2018). Preparation and Optical Properties of Self-assembled ZnO Lyche-like Aggregates. In: Han, Y. (eds) Advanced Functional Materials. CMC 2017. Springer, Singapore. https://doi.org/10.1007/978-981-13-0110-0_9
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DOI: https://doi.org/10.1007/978-981-13-0110-0_9
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