Author: Cao, Chunyan

Source: Journal of Nanoscience and Nanotechnology, Volume 11, Number 11, November 2011 , pp. 9701-9704(4)

Publisher: American Scientific Publishers

Abstract:

Through a co-precipitation method Gd(OH)₃:20%Yb³⁺, 1%Tm³⁺ nanorods were synthesized. After sintered at 900 °C for 1 h in air, the as-prepared Gd(OH)₃:20%Yb³⁺, 1%Tm³⁺ nanorods were converted into Gd₂O₃:20%Yb³⁺, 1% Tm³⁺ nanocrystals. Crystalline phases, sizes, and morphologies of the two samples were characterized by X-ray diffraction and field emission scanning electron microscope. The up-conversion (UC) fluorescence spectra of the Gd₂O₃:20%Yb³⁺, 1%Tm³⁺ nanocrystals were recorded by using a fluorescence spectrophotometer with a 980 nm continuous wave laser diode as excitation source. The nanocrystals not only present characteristic blue and ultraviolet (UV) UC emissions of activated Tm³⁺, but also show UV UC emissions of host Gd³⁺. The experimental study suggests that the excitation power has great effects on UC fluorescence properties and the energy transfer from Tm³⁺ to Gd³⁺ is very efficient.

Keywords: BLUE; ULTRAVIOLET; UP-CONVERSION; FLUORESCENCE; GD2O3:20%YB3+; 1%TM3+

Document Type: Research article

DOI: http://dx.doi.org/10.1166/jnn.2011.5266

Publication date: 2011-11-01

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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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