Microstructural and photoluminescent characterization of one-dimensional ZnO nanostructures prepared by catalyst-assisted vapour-liquid-solid technique

S. Chakrabarti, S. Chaudhuri

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18 Citations (Scopus)

Abstract

ZnO one-dimensional nanostructures were synthesized in thin-film form on Si substrates by the vapour-liquid-solid technique using Au as catalyst. The morphology of the ZnO nanostructures (from wire/ribbon to rod) was controlled by varying the thicknesses of the Au layers on the Si substrates. The X-ray diffraction studies of the ZnO nanostructures indicated high crystallinity and preferred orientation along the (002) plane of the wurtzite phase. The compositional analysis of ZnO nanostructures by energy-dispersive X-ray analysis revealed their chemical purity. High-resolution transmission electron microscopy indicated dislocation-free structure. The single crystallinity of the ZnO nanostructures was examined by selected-area electron diffraction. The room-temperature photoluminescence spectra of the ZnO nanostructures indicated high intensity of the ultraviolet excitonic emission. Two very week defect-related visible emissions were also observed which revealed almost a defect-free structure and good optical quality of the synthesized material.

LanguageEnglish
Pages196-200
Number of pages5
JournalMaterials Chemistry and Physics
Volume87
Issue number1
DOIs
Publication statusPublished - 1 Sep 2004

Fingerprint

Nanostructures
crystallinity
Vapors
vapors
catalysts
Catalysts
ultraviolet emission
defects
Liquids
liquids
wurtzite
ribbons
purity
x rays
rods
electron diffraction
wire
photoluminescence
transmission electron microscopy
high resolution

Keywords

  • One-dimensional nanostructures
  • Photoluminescence
  • Ultraviolet emission
  • Vapour-liquid-solid process
  • ZnO films

Cite this

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abstract = "ZnO one-dimensional nanostructures were synthesized in thin-film form on Si substrates by the vapour-liquid-solid technique using Au as catalyst. The morphology of the ZnO nanostructures (from wire/ribbon to rod) was controlled by varying the thicknesses of the Au layers on the Si substrates. The X-ray diffraction studies of the ZnO nanostructures indicated high crystallinity and preferred orientation along the (002) plane of the wurtzite phase. The compositional analysis of ZnO nanostructures by energy-dispersive X-ray analysis revealed their chemical purity. High-resolution transmission electron microscopy indicated dislocation-free structure. The single crystallinity of the ZnO nanostructures was examined by selected-area electron diffraction. The room-temperature photoluminescence spectra of the ZnO nanostructures indicated high intensity of the ultraviolet excitonic emission. Two very week defect-related visible emissions were also observed which revealed almost a defect-free structure and good optical quality of the synthesized material.",
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N2 - ZnO one-dimensional nanostructures were synthesized in thin-film form on Si substrates by the vapour-liquid-solid technique using Au as catalyst. The morphology of the ZnO nanostructures (from wire/ribbon to rod) was controlled by varying the thicknesses of the Au layers on the Si substrates. The X-ray diffraction studies of the ZnO nanostructures indicated high crystallinity and preferred orientation along the (002) plane of the wurtzite phase. The compositional analysis of ZnO nanostructures by energy-dispersive X-ray analysis revealed their chemical purity. High-resolution transmission electron microscopy indicated dislocation-free structure. The single crystallinity of the ZnO nanostructures was examined by selected-area electron diffraction. The room-temperature photoluminescence spectra of the ZnO nanostructures indicated high intensity of the ultraviolet excitonic emission. Two very week defect-related visible emissions were also observed which revealed almost a defect-free structure and good optical quality of the synthesized material.

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KW - Ultraviolet emission

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