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Facile Mixed-Solvent-Thermal Synthesis and Characterization of Shape-Controlled Monodisperse CeF3:Tb3+ Nanocrystals

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Monodisperse CeF3:Tb3+ nanocrystals have been synthesized from mixed solvents-thermal synthesis under mild condition. The products have been characterized by High Resolution Transmission electron microscopy (HRTEM), X-ray diffraction (XRD), UV-visible Diffuse Reflectance spectra and luminescent spectra, respectively. Besides, different solvents ratio and different surfactants to synthesize CeF3:Tb3+ nanocrystals have been compared to investigate the influence on their microstructure and morphology. As a result, the HRTEM images reveal the products crystallize in the hexagonal structure corresponding to the XRD and illustrate the mean rod length of about 15 nm, whose preferred orientation is parallel to the growth direction, namely c axis direction. The solvent ratios have influence on the microstructure and morphology of the products to some extent. With the increase of DMF solvent, the shape of CeF3:10%Tb3+ changed from grain-like particles to rodlike ones. In addition, a disordered array of CeF3:10%Tb3+ nanocrystals can be obtained with the existence of oleic acid. The characteristic emissions of Tb3+ originated from 5D47FJ (J = 6, 5, 4, 3) are observed, and the dominant peak was the green emission of 543 nm. Measurements of emission spectra have been performed to examine the effect of Tb3+ concentration quenching on spectroscopic properties. The optimum doping-concentration ratio of Tb3+ was found to be approximately 15 mol%.
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Document Type: Research Article

Publication date: 2009-11-01

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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