Characteristics of SnO<sub>2</sub> fishbone‐like nanostructures prepared by the thermal evaporation

Kim, Hyoun Woo; Kim, Nam Ho; Myung, Ju Hyun; Shim, Seung Hyun

doi:10.1002/pssa.200520031

Cited by 53 publications

(24 citation statements)

References 21 publications

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“…Thus, the nature of the transition is tentatively ascribed to oxygen vacancies, Sn vacancies or Sn interstitials, which form a considerable number of trapped states within the band gap [20][21][22][23][24]. In this work, all the SnO 2 nanocrystalline powders heated at different temperatures and all samples were excited with a dominant emission peaks which was observed at 417 nm (blue) ascribed as luminescence centers.…”

Section: Resultsmentioning

confidence: 92%

Photoluminescence Studies on Nanocrystalline Tin Oxide Powder for Optoelectronic Devices

Nehru¹,

Swaminathan²,

Sanjeeviraja³

2012

MATERIALS

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Nanocrystalline tin oxide (SnO 2 ) powders have been synthesized by a low temperature chemical precipitation method. As-prepared and heated powders were characterized by XRD, SEM and luminescence studies. Crystallographic parameters such as crystallite size, lattice parameters and dislocation density in SnO 2 nanocrystalline powders were calculated by Rietveld analysis. The average crystallite size of 9 -43 nm was obtained for SnO 2 powders through controlled heat treatment process. The washed powders morphology was almost spherical in shape and average agglomerate crystal size was between 0.2 -0.4 μm. A Photoluminescence (PL) study was measured at an excitation wavelength of 265 nm for as-prepared and annealed powders; it showed a broad emission peak at 417 nm for all powders. The highest PL emission was attained for the powder annealed at 500℃. The synthesized nanocrystalline SnO 2 oxide semiconductor material could be suitable for making optoelectronic and sensor devices.

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Section: Resultsmentioning

confidence: 92%

Photoluminescence Studies on Nanocrystalline Tin Oxide Powder for Optoelectronic Devices

Nehru¹,

Swaminathan²,

Sanjeeviraja³

2012

MATERIALS

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“…MgO whiskers were synthesized in a conventional tube furnace with a horizontal quartz glass tube [13]. The synthetic route can be described as follows.…”

Section: Methodsmentioning

confidence: 99%

Fabrication of MgO whiskers on metal-coated substrates by heating MgB2 powders: Effects of Ag layer thickness

2007

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A thermal evaporation approach was developed to synthesize single-crystalline MgO whiskers on silver (Ag) layer-coated Si substrates. Magnesium diboride (MgB 2 ) and oxygen (O 2 ) were used as Mg and O precursors, respectively. The synthetic process using a thinner Ag layer facilitated the growth of 1D whiskers, and the product mainly comprises film-like structures with thicker Ag layer thickness. X-ray diffraction and selected area electron diffraction pattern revealed that the whiskers were of a single-crystalline cubic structure of MgO. We also discuss the possible mechanism by which the thickness of the underlying Ag layer affects the resultant morphology of the MgO structures.

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“…The sputtering was carried out at a pressure of 8 × 10 −4 Pa in high purity argon (Ar) gas (99.999%) with dc sputtering power of about 33 W, at room temperature. The substrate was placed in a quartz tube [8] which was heated in a tube furnace at 1000…”

Section: Methodsmentioning

confidence: 99%

SiO_xNanowires Produced on Molybdenum-Coated Si Substrates

2008

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We synthesized SiOx nanowires with diameters of 30-140 nm, for the first time by the simple heating of the Mo-coated Si substrates. X-ray diffraction, selected area electron diffraction, and energy-dispersive X-ray spectroscopy indicated that the nanowires were in an amorphous state, comprising Si and O only. Fitting the photoluminescence spectrum with Gaussian functions revealed that the nanowires exhibited significant photoluminescence intensities near blue and green light regions. We extensively discussed the possible growth mechanism of SiOx nanowires.

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Characteristics of SnO₂ fishbone‐like nanostructures prepared by the thermal evaporation

Cited by 53 publications

References 21 publications

Photoluminescence Studies on Nanocrystalline Tin Oxide Powder for Optoelectronic Devices

Photoluminescence Studies on Nanocrystalline Tin Oxide Powder for Optoelectronic Devices

Fabrication of MgO whiskers on metal-coated substrates by heating MgB2 powders: Effects of Ag layer thickness

SiO_xNanowires Produced on Molybdenum-Coated Si Substrates

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Characteristics of SnO2 fishbone‐like nanostructures prepared by the thermal evaporation

Cited by 53 publications

References 21 publications

Photoluminescence Studies on Nanocrystalline Tin Oxide Powder for Optoelectronic Devices

Photoluminescence Studies on Nanocrystalline Tin Oxide Powder for Optoelectronic Devices

Fabrication of MgO whiskers on metal-coated substrates by heating MgB2 powders: Effects of Ag layer thickness

SiOxNanowires Produced on Molybdenum-Coated Si Substrates

Contact Info

Product

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Characteristics of SnO₂ fishbone‐like nanostructures prepared by the thermal evaporation

SiO_xNanowires Produced on Molybdenum-Coated Si Substrates