Photoluminescence of rare earth3+ doped uniaxially aligned HfO2 nanotubes prepared by sputtering with electrospun polyvinylpyrolidone nanofibers as templates.

التفاصيل البيبلوغرافية
العنوان:	Photoluminescence of rare earth³⁺ doped uniaxially aligned HfO2 nanotubes prepared by sputtering with electrospun polyvinylpyrolidone nanofibers as templates.
المؤلفون:	Liu, L. X., Ma, Z. W., Xie, Y. Z., Su, Y. R., Zhao, H. T., Zhou, M., Zhou, J. Y., Li, J., Xie, E. Q.
المصدر:	Journal of Applied Physics; Jan2010, Vol. 107 Issue 2, p024309-024314, 5p, 2 Black and White Photographs, 5 Graphs
مصطلحات موضوعية:	PHYSICS research, SEMICONDUCTOR doping, PHOTOLUMINESCENCE, NANOTUBES, NANOSTRUCTURED materials, SPUTTERING (Physics), SPECTRUM analysis, RARE earth metals
مستخلص:	Rare earth (RE) ions (Eu³⁺,Tb³⁺) doped uniaxially aligned HfO2 nanotubes were prepared by radio frequency sputtering with electrospun polyvinylpyrolidone (PVP) nanofiber templates. The as-sputtered samples were annealed at different temperatures (500–1000 °C) in O2 ambient in order to remove their PVP cores and make the HfO2 shells well crystallized. Morphologies and crystal configuration of the samples were investigated by optical microscope, scanning electron microscopy, transmission electron microscopy, x–ray diffraction, and Raman spectroscopy. The nanotubes have uniform intact structure with an average diameter of 200 nm and a wall thickness of about 25 nm. Photoluminescence (PL) properties of the RE doped nanotubes have been studied in detail. The emission peaks of the aligned HfO2:Eu and HfO2:Tb nanotubes could correspond to the ⁵D0→⁷FJ (J=0–2) transitions of Eu³⁺ and the ⁵D4→⁷FJ (J=3–6) transitions of Tb³⁺, respectively. The PL intensities of the HfO2:RE³⁺ nanotubes were higher by several orders of magnitude than that of the films. This enhancement in the PL could be ascribed to the high density of surface states of HfO2:RE³⁺ nanotubes. [ABSTRACT FROM AUTHOR]
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قاعدة البيانات:	Complementary Index

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الوصف
تدمد:	00218979
DOI:	10.1063/1.3290974