Journal
SOLID STATE COMMUNICATIONS
Volume 150, Issue 27-28, Pages 1208-1212Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ssc.2010.04.017
Keywords
Nanotubes; Synchrotron X-ray; Luminescence
Categories
Funding
- National Science Foundation [DMR-0619215, MRI 04-511]
- Defense Threat Reduction Agency [HDTRA 1-09-0034]
- Army Research Office [W911NF-09-1-0001]
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Pure and Eu-doped Y2O3 nanotubes (NTs) were synthesized by a hydrothermal method. The crystal structure of synthesized pure and Eu-doped Y2O3 NTs are respectively stable to 22 and 18.3 GPa, which are about 10 GPa higher than bulk Y2O3. Phase transformation routes of Y2O3 NTs are cubic -> amorphous directly instead of cubic -> monoclinic -> hexagonal of bulk Y2O3. Due to the doped Eu3+ ions, the Eu-doped Y2O3 has larger cell parameters, lower phase transformation pressure, and smaller bulk modulus compared to pure Y2O3 NTs. The much elevated structural stability of the Eu-doped Y2O3 NTs, which is attributed to the size-induced high energy kinetic hindrance, leads to an ultrastable luminescence. Such a novel property of Eu-doped Y2O3 NTs is expected to play a significant role in high-stability nano-photo-devices. (C) 2010 Elsevier Ltd. All rights reserved.
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