Synthesis and Spectral Characterization of EuPO₄ and LaPO₄:Eu Nanorods

Authors: De-Hui, Sun; Ji-Lin, Zhang; De-Xin, Sun

Source: Journal of Nanoscience and Nanotechnology, Volume 10, Number 3, March 2010 , pp. 1782-1787(6)

Publisher: American Scientific Publishers

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Abstract:

Monoclinic monazite-type EuPO₄ and LaPO₄:Eu nanorods were synthesized by a microemulsion-assisted solvothermal method. Their morphologies, structures, and fluorescent properties were characterized by SEM, XRD, and photoluminescence (PL) modern analytic means, respectively. The aspect ratios of EuPO₄ and LaPO₄:Eu nanorods have a decreasing tendency with increasing carbon chain length of assisted surfactants. When the assisted surfactant was n-butyl alcohol, the EuPO₄ exhibited nanorod morphology with diameters from 20 to 30 nm and lengths from 100 to 150 nm. When the assisted surfactant was n-pentanol, the EuPO₄ nanorods had lengths between 200 and 300 nm and a diameter range similar to that of the n-butyl alcohol nanorods. When the assisted surfactant was n-hexanol and n-octyl alcohol, only elliptical EuPO₄ products were obtained. The LaPO₄:Eu nanorods synthesized in the presence of different assisted-surfactants exhibited elliptical morphologies with diameters of 40-60 nm and lengths of 70-110 nm. The LaPO₄:Eu and EuPO₄ nanorods showed a orange prominent emission peak from magnetic-dipole transition ⁵D₀ → ⁷F₁ (593 nm) of Eu³⁺ ions whose sites in the EuPO₄ and LaPO₄:Eu nanorods have C₁ symmetry. Compared with bulk LaPO₄:Eu, the fine structure of the Eu-O charge transfer band has very small red shift resulting from the slight increase of the length of Eu-O bond due to nanoscale size effect.

Keywords: EUPO4; LAPO4:EU; NANORODS; MICROEMULSION; PHOTOLUMINESCENCE

Document Type: Research article

DOI: http://dx.doi.org/10.1166/jnn.2010.2111

Publication date: 2010-03-01

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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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