Characteristics of SiOx-Cored composite nanowires with Pd shell layers

Hyoun Woo Kim, Mesfin Abayneh Kebede, Hyo Sung Kim

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

This paper describes the fabrication of Pd-coated SiOx nanowires via a simple approach and reports the effects of subsequent thermal annealing. While the as-synthesized Pd-coated SiOx nanowires exhibited smooth onedimensional (1D) nanostructures, the thermal annealing induced a rough surface. X-ray diffraction, selected area electron diffraction, and lattice-resolved transmission electron microscopy coincidentally revealed that the assynthesized Pd-coated SiOx nanowires were comprised of a cubic Pd phase, whereas annealing generated a tetragonal PdO phase. Micro-Raman spectroscopy measurements showed the presence of 630 cm-1-peak, which can be assigned to the B1g mode of single crystal PdO, whether samples had been annealed or not. Although both Pd and PdO phases did not exhibit PL emission, the PL intensity of core SiOx nanowires has been significantly reduced by the Pd-coating, presumably due to the covering effect.

Original languageEnglish
Pages (from-to)665-670
Number of pages6
JournalMetals and Materials International
Volume15
Issue number4
DOIs
StatePublished - 2009 Aug 1

Fingerprint

Nanowires
nanowires
composite materials
Composite materials
Annealing
annealing
Electron diffraction
Raman spectroscopy
Nanostructures
coverings
electron diffraction
Single crystals
Transmission electron microscopy
coatings
Fabrication
X ray diffraction
Coatings
transmission electron microscopy
fabrication
single crystals

Keywords

  • Nanowires
  • Pd
  • SiO
  • Thermal annealing

Cite this

Kim, Hyoun Woo ; Kebede, Mesfin Abayneh ; Kim, Hyo Sung. / Characteristics of SiOx-Cored composite nanowires with Pd shell layers. In: Metals and Materials International. 2009 ; Vol. 15, No. 4. pp. 665-670.
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Characteristics of SiOx-Cored composite nanowires with Pd shell layers. / Kim, Hyoun Woo; Kebede, Mesfin Abayneh; Kim, Hyo Sung.

In: Metals and Materials International, Vol. 15, No. 4, 01.08.2009, p. 665-670.

Research output: Contribution to journalArticle

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AB - This paper describes the fabrication of Pd-coated SiOx nanowires via a simple approach and reports the effects of subsequent thermal annealing. While the as-synthesized Pd-coated SiOx nanowires exhibited smooth onedimensional (1D) nanostructures, the thermal annealing induced a rough surface. X-ray diffraction, selected area electron diffraction, and lattice-resolved transmission electron microscopy coincidentally revealed that the assynthesized Pd-coated SiOx nanowires were comprised of a cubic Pd phase, whereas annealing generated a tetragonal PdO phase. Micro-Raman spectroscopy measurements showed the presence of 630 cm-1-peak, which can be assigned to the B1g mode of single crystal PdO, whether samples had been annealed or not. Although both Pd and PdO phases did not exhibit PL emission, the PL intensity of core SiOx nanowires has been significantly reduced by the Pd-coating, presumably due to the covering effect.

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