Journal article
Temperature-Dependent Phase Changes in Multicolored ErxYbyZr1-x-yO2/Eu0.02Y1.98O3 Core/Shell Nanoparticles
Journal of physical chemistry. C, Vol.117(27), pp.14427-14434
07/11/2013
Abstract
We combine forced hydrolysis and homogeneous precipitation to synthesize metal-oxide precursors with spherical core/shell morphology. The core consists of an amorphous ErxYbyZr1-x-yO2 precursor, and the shell consists of an amorphous Eu0.02Y1.98O3 precursor. Upon heating, the doped metal-oxide precursors undergo gradual irreversible phase changes toward their crystalline oxide phases. The crystalline ZrO2 phase of the core forms at a lower temperature than the crystalline Y2O3 phase of the shell. The Er3+, Yb3+, and Eu3+ dopants can be photoexcited at specific wavelengths to emit their characteristic visible emissions. Depending on the Er3+/Yb3+ dopant ratio, the Er3+ dopant emission appears green, red, or yellow-brown, whereas the Eu3+ dopant emission appears orange-red. The irreversible temperature-induced phase changes are correlated with changes in the optical spectra of these materials. These temperature-induced phase changes and the respective changes in the optical spectra are detectable even when the nanoparticles are heated for only 10 s.
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Details
- Title
- Temperature-Dependent Phase Changes in Multicolored ErxYbyZr1-x-yO2/Eu0.02Y1.98O3 Core/Shell Nanoparticles
- Creators
- Ray Gunawidjaja - Washington State UniversityThandar Myint - Washington State UniversityHergen Eilers - Washington State University Spokane
- Publication Details
- Journal of physical chemistry. C, Vol.117(27), pp.14427-14434
- Academic Unit
- Institute for Shock Physics
- Publisher
- Amer Chemical Soc
- Number of pages
- 8
- Grant note
- HDTRA1-10-1-0005 / Defense Threat Reduction Agency, Basic Research Award; United States Department of Defense; Defense Threat Reduction Agency
- Identifiers
- 99900876139101842
- Language
- English
- Resource Type
- Journal article