Microstructure and field emission characteristics of ZnO nanoneedles grown by physical vapor deposition

A George, P Kumari, N Soin, SS Roy, JAD McLaughlin

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

Single crystalline zinc oxide (ZnO) nanoneedles have been grown on Au coated Si (1 0 0) substrates in an inert gas atmosphere by physical vapor deposition (PVD) process. A mixture of ZnO and graphite powder was used as precursor for the production of nanoneedles. Their structure has been assessed by a range of techniques including scanning electron microscope (SEM), high-resolution transmission electron microscopy (HRTEM), Raman spectroscopy, X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The synthesized ZnO nanoneedles have tip diameter around 30 nm and average length of 5 μm. The XRD patterns and HRTEM measurements revealed the highly crystalline phase of wurtzite single crystalline structure, with a preferred 0 0 0 1 growth direction. Field emission from these nanoneedles was investigated and a low turn on voltage of 5.07 V μm−1 at a current density of 10 μA cm−2 was observed.
LanguageEnglish
Pages634
JournalMaterials Chemistry and Physics
Volume123
Issue number2-3
DOIs
Publication statusPublished - 2010

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Nanoneedles
Zinc Oxide
Physical vapor deposition
Zinc oxide
Field emission
zinc oxides
field emission
vapor deposition
microstructure
Microstructure
High resolution transmission electron microscopy
Crystalline materials
transmission electron microscopy
x rays
high resolution
Noble Gases
X ray diffraction
wurtzite
Graphite
rare gases

Cite this

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title = "Microstructure and field emission characteristics of ZnO nanoneedles grown by physical vapor deposition",
abstract = "Single crystalline zinc oxide (ZnO) nanoneedles have been grown on Au coated Si (1 0 0) substrates in an inert gas atmosphere by physical vapor deposition (PVD) process. A mixture of ZnO and graphite powder was used as precursor for the production of nanoneedles. Their structure has been assessed by a range of techniques including scanning electron microscope (SEM), high-resolution transmission electron microscopy (HRTEM), Raman spectroscopy, X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The synthesized ZnO nanoneedles have tip diameter around 30 nm and average length of 5 μm. The XRD patterns and HRTEM measurements revealed the highly crystalline phase of wurtzite single crystalline structure, with a preferred 0 0 0 1 growth direction. Field emission from these nanoneedles was investigated and a low turn on voltage of 5.07 V μm−1 at a current density of 10 μA cm−2 was observed.",
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Microstructure and field emission characteristics of ZnO nanoneedles grown by physical vapor deposition. / George, A; Kumari, P; Soin, N; Roy, SS; McLaughlin, JAD.

In: Materials Chemistry and Physics, Vol. 123, No. 2-3, 2010, p. 634.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Microstructure and field emission characteristics of ZnO nanoneedles grown by physical vapor deposition

AU - George, A

AU - Kumari, P

AU - Soin, N

AU - Roy, SS

AU - McLaughlin, JAD

PY - 2010

Y1 - 2010

N2 - Single crystalline zinc oxide (ZnO) nanoneedles have been grown on Au coated Si (1 0 0) substrates in an inert gas atmosphere by physical vapor deposition (PVD) process. A mixture of ZnO and graphite powder was used as precursor for the production of nanoneedles. Their structure has been assessed by a range of techniques including scanning electron microscope (SEM), high-resolution transmission electron microscopy (HRTEM), Raman spectroscopy, X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The synthesized ZnO nanoneedles have tip diameter around 30 nm and average length of 5 μm. The XRD patterns and HRTEM measurements revealed the highly crystalline phase of wurtzite single crystalline structure, with a preferred 0 0 0 1 growth direction. Field emission from these nanoneedles was investigated and a low turn on voltage of 5.07 V μm−1 at a current density of 10 μA cm−2 was observed.

AB - Single crystalline zinc oxide (ZnO) nanoneedles have been grown on Au coated Si (1 0 0) substrates in an inert gas atmosphere by physical vapor deposition (PVD) process. A mixture of ZnO and graphite powder was used as precursor for the production of nanoneedles. Their structure has been assessed by a range of techniques including scanning electron microscope (SEM), high-resolution transmission electron microscopy (HRTEM), Raman spectroscopy, X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The synthesized ZnO nanoneedles have tip diameter around 30 nm and average length of 5 μm. The XRD patterns and HRTEM measurements revealed the highly crystalline phase of wurtzite single crystalline structure, with a preferred 0 0 0 1 growth direction. Field emission from these nanoneedles was investigated and a low turn on voltage of 5.07 V μm−1 at a current density of 10 μA cm−2 was observed.

U2 - 10.1016/j.matchemphys.2010.05.029

DO - 10.1016/j.matchemphys.2010.05.029

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JO - Materials Chemistry and Physics

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JF - Materials Chemistry and Physics

SN - 0254-0584

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ER -