Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 509, Issue 5, Pages 2060-2065Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2010.10.141
Keywords
Surfactant-mediated method; Rare-earth hydroxides; Nanorods; Room temperature photoluminescence
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Funding
- Yunnan University, China [ynuy200935]
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The stable and crystalline pure phase Ln(OH)(3) (Ln = La, Sm, Tb, Eu, and Gd) nanorods with diameters of approximately 15-90 nm and lengths of 120-500 nm were synthesized using cationic surfactant (cetyltrimethylammonium bromide, CTAB) micelle solution at room temperature. X-ray diffraction (XRD) spectra, Fourier transformed infrared (FIR) spectrum, transmission electron microscopy (TEM), high-resolution TEM (HRTEM) and Raman spectroscopy were used to examine the morphologies and microstructures to find out the cause. The four observed Raman peaks indicated the typical hexagonal phase, which was in agreement with the X-ray diffraction results. A possible formation mechanism of these Ln(OH)(3) nanorods was proposed. The results suggest that this process may be a convenient and effective approach to prepare rare-earth hydroxides with 1D nanostructures. Room temperature photoluminescence (RTPL) properties were investigated under the excitation of 275 nm. The samples exhibited the emission peaks of room temperature photoluminescence. (C) 2010 Elsevier B.V. All rights reserved.
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