Growth and properties of ZnO nanoblade and nanoflower prepared by ultrasonic pyrolysis

Hyo Won Sun; Gil Young Kim; Yeon Sik Jung; Won Kook Choi; Dongjin Byun

doi:10.1063/1.1849825

Growth and properties of ZnO nanoblade and nanoflower prepared by ultrasonic pyrolysis

Hyo Won Sun, Gil Young Kim, Yeon Sik Jung, Won Kook Choi, Dongjin Byun

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Abstract

ZnO nanoblades and nanoflowers are synthesized using zinc acetate dihydrate Zn(CH ₃COO) ₂·2H ₂O dissolved in distilled water by ultrasonic pyrolysis at 380-500°C. 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 400°C the formation of nanoblades resulted from the simultaneous precipitation and nucleation in zinc acetate precursor. At an elevated temperature of 450°C, decomposition was almost advanced and thus the size of nanopetal became smaller and aggregates became larger by as much as 60 nm. 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 E _g(0) = 3.372 eV and Debye temperature β=477±65 K by the fitting curve of free exciton peak as a function of temperature to Varshni equation, E _g(T)=E _g(0)- αT ²(β+T), which are very close to bulk ZnO.

Original language	English
Article number	044305
Journal	Journal of Applied Physics
Volume	97
Issue number	4
DOIs	https://doi.org/10.1063/1.1849825
Publication status	Published - 2005 Feb 15

Bibliographical note

Funding Information:
This work was financially supported by the KIST Future Resources Program Grant No. 2E18160. The authors appreciate S. C. Kim for taking HRTEM in Advanced Analysis Center (ACC) in KIST and also Dr. J. P. Ahn for analysis, Nano Materials Research Center (NMRC) in KIST.

ASJC Scopus subject areas

General Physics and Astronomy

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title = "Growth and properties of ZnO nanoblade and nanoflower prepared by ultrasonic pyrolysis",

abstract = "ZnO nanoblades and nanoflowers are synthesized using zinc acetate dihydrate Zn(CH 3COO) 2·2H 2O dissolved in distilled water by ultrasonic pyrolysis at 380-500°C. 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 400°C the formation of nanoblades resulted from the simultaneous precipitation and nucleation in zinc acetate precursor. At an elevated temperature of 450°C, decomposition was almost advanced and thus the size of nanopetal became smaller and aggregates became larger by as much as 60 nm. 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 E g(0) = 3.372 eV and Debye temperature β=477±65 K by the fitting curve of free exciton peak as a function of temperature to Varshni equation, E g(T)=E g(0)- αT 2(β+T), which are very close to bulk ZnO.",

author = "Sun, {Hyo Won} and Kim, {Gil Young} and Jung, {Yeon Sik} and Choi, {Won Kook} and Dongjin Byun",

note = "Funding Information: This work was financially supported by the KIST Future Resources Program Grant No. 2E18160. The authors appreciate S. C. Kim for taking HRTEM in Advanced Analysis Center (ACC) in KIST and also Dr. J. P. Ahn for analysis, Nano Materials Research Center (NMRC) in KIST. ",

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doi = "10.1063/1.1849825",

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T1 - Growth and properties of ZnO nanoblade and nanoflower prepared by ultrasonic pyrolysis

AU - Sun, Hyo Won

AU - Kim, Gil Young

AU - Jung, Yeon Sik

AU - Choi, Won Kook

AU - Byun, Dongjin

N1 - Funding Information: This work was financially supported by the KIST Future Resources Program Grant No. 2E18160. The authors appreciate S. C. Kim for taking HRTEM in Advanced Analysis Center (ACC) in KIST and also Dr. J. P. Ahn for analysis, Nano Materials Research Center (NMRC) in KIST.

PY - 2005/2/15

Y1 - 2005/2/15

N2 - ZnO nanoblades and nanoflowers are synthesized using zinc acetate dihydrate Zn(CH 3COO) 2·2H 2O dissolved in distilled water by ultrasonic pyrolysis at 380-500°C. 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 400°C the formation of nanoblades resulted from the simultaneous precipitation and nucleation in zinc acetate precursor. At an elevated temperature of 450°C, decomposition was almost advanced and thus the size of nanopetal became smaller and aggregates became larger by as much as 60 nm. 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 E g(0) = 3.372 eV and Debye temperature β=477±65 K by the fitting curve of free exciton peak as a function of temperature to Varshni equation, E g(T)=E g(0)- αT 2(β+T), which are very close to bulk ZnO.

AB - ZnO nanoblades and nanoflowers are synthesized using zinc acetate dihydrate Zn(CH 3COO) 2·2H 2O dissolved in distilled water by ultrasonic pyrolysis at 380-500°C. 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 400°C the formation of nanoblades resulted from the simultaneous precipitation and nucleation in zinc acetate precursor. At an elevated temperature of 450°C, decomposition was almost advanced and thus the size of nanopetal became smaller and aggregates became larger by as much as 60 nm. 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 E g(0) = 3.372 eV and Debye temperature β=477±65 K by the fitting curve of free exciton peak as a function of temperature to Varshni equation, E g(T)=E g(0)- αT 2(β+T), which are very close to bulk ZnO.

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Growth and properties of ZnO nanoblade and nanoflower prepared by ultrasonic pyrolysis

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