ZnO nanoblades and nanoflowers are synthesized using zinc acetate dihydrate dissolved in distilled water by ultrasonic pyrolysis at . Thermogravimetry-differential scanning calorimetry, x-ray diffraction, field-emission scanning electron microscopy, high-resolution transmission electron microscopy, Raman spectroscopy, and low-temperature photoluminescence (PL) were used to characterize the thermal properties, crystalline and optical features of the ZnO nanostructures. The results showed that at the formation of nanoblades resulted from the simultaneous precipitation and nucleation in zinc acetate precursor. At an elevated temperature of , decomposition was almost advanced and thus the size of nanopetal became smaller and aggregates became larger by as much as . The formation of aggregates is explained in terms of random nucleation model. Through PL measurement, nanoblade showed a strong near band-edge emission with negligible deep-level emission and free exciton band-gap energy and Debye temperature by the fitting curve of free exciton peak as a function of temperature to Varshni equation, , which are very close to bulk ZnO.
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15 February 2005
Research Article|
January 21 2005
Growth and properties of ZnO nanoblade and nanoflower prepared by ultrasonic pyrolysis
Hyo-Won Suh;
Hyo-Won Suh
Thin Film Materials Research Center (TFMRC),
Korea Institute of Science and Technology
, Cheongryang P.O. Box 131, Seoul 130-650, Korea
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Gil-Young Kim;
Gil-Young Kim
Thin Film Materials Research Center (TFMRC),
Korea Institute of Science and Technology
, Cheongryang P.O. Box 131, Seoul 130-650, Korea
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Yeon-Sik Jung;
Yeon-Sik Jung
Thin Film Materials Research Center (TFMRC),
Korea Institute of Science and Technology
, Cheongryang P.O. Box 131, Seoul 130-650, Korea
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Won-Kook Choi;
Won-Kook Choi
a)
Thin Film Materials Research Center (TFMRC),
Korea Institute of Science and Technology
, Cheongryang P.O. Box 131, Seoul 130-650, Korea
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Dongjin Byun
Dongjin Byun
Department of Materials Engineering,
Korea University
, Sungbuk-Ku, Anam-dong 5-Ka, 1, Seoul 136-701, Korea
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a)
Author to whom correspondence should be addressed; electronic mail: [email protected]
J. Appl. Phys. 97, 044305 (2005)
Article history
Received:
August 31 2004
Accepted:
November 22 2004
Citation
Hyo-Won Suh, Gil-Young Kim, Yeon-Sik Jung, Won-Kook Choi, Dongjin Byun; Growth and properties of ZnO nanoblade and nanoflower prepared by ultrasonic pyrolysis. J. Appl. Phys. 15 February 2005; 97 (4): 044305. https://doi.org/10.1063/1.1849825
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