Field emission properties of gold nanoparticle-decorated ZnO nanopillars

Yuan Ming Chang; Man Ling Lin; Tung Yen Lai; Hsin Yi Lee; Chih Ming Lin; Yew-Chuhg Wu; Jenh-Yih Juang

doi:10.1021/am301848a

Field emission properties of gold nanoparticle-decorated ZnO nanopillars

Yuan Ming Chang^*, Man Ling Lin, Tung Yen Lai, Hsin Yi Lee, Chih Ming Lin, Yew-Chuhg Wu, Jenh-Yih Juang

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

49 Scopus citations

Abstract

The structural and optoelectronic properties of ZnO nanopillars (ZnO-NPs) grown on Si substrates by the vapor transport deposition method were investigated. In particular, by varying the deposition duration and hence the morphology of the vertically aligned ZnO-NPs, the resultant field emission characteristics were systematically compared. In addition to identifying the advantageous field emission properties exhibited in the pencil-like ZnO-NPs, we observed that by adhering Au nanoparticles on the surface of the ZnO-NPs the turn-on field and the maximum current density can be drastically improved from 3.15 V/μm and 0.44 mA/cm² at 5 V/μm for the best ZnO-NPs to 2.65 V/μm and 2.11 mA/cm² at 5 V/μm for Au/ZnO-NPs, respectively. The enhancement of field emission characteristics that resulted from Au-nanoparticle decoration is discussed on the basis of charge-transfer-induced band structure modifications.

Original language	English
Pages (from-to)	6676-6682
Number of pages	7
Journal	ACS Applied Materials and Interfaces
Volume	4
Issue number	12
DOIs	https://doi.org/10.1021/am301848a
State	Published - 26 Dec 2012

Keywords

Au nanoparticles
ZnO nanopillars
current density
field emission
turn-on field
vapor transport deposition

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title = "Field emission properties of gold nanoparticle-decorated ZnO nanopillars",

abstract = "The structural and optoelectronic properties of ZnO nanopillars (ZnO-NPs) grown on Si substrates by the vapor transport deposition method were investigated. In particular, by varying the deposition duration and hence the morphology of the vertically aligned ZnO-NPs, the resultant field emission characteristics were systematically compared. In addition to identifying the advantageous field emission properties exhibited in the pencil-like ZnO-NPs, we observed that by adhering Au nanoparticles on the surface of the ZnO-NPs the turn-on field and the maximum current density can be drastically improved from 3.15 V/μm and 0.44 mA/cm2 at 5 V/μm for the best ZnO-NPs to 2.65 V/μm and 2.11 mA/cm2 at 5 V/μm for Au/ZnO-NPs, respectively. The enhancement of field emission characteristics that resulted from Au-nanoparticle decoration is discussed on the basis of charge-transfer-induced band structure modifications.",

keywords = "Au nanoparticles, ZnO nanopillars, current density, field emission, turn-on field, vapor transport deposition",

author = "Chang, {Yuan Ming} and Lin, {Man Ling} and Lai, {Tung Yen} and Lee, {Hsin Yi} and Lin, {Chih Ming} and Yew-Chuhg Wu and Jenh-Yih Juang",

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doi = "10.1021/am301848a",

language = "English",

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T1 - Field emission properties of gold nanoparticle-decorated ZnO nanopillars

AU - Chang, Yuan Ming

AU - Lin, Man Ling

AU - Lai, Tung Yen

AU - Lee, Hsin Yi

AU - Lin, Chih Ming

AU - Wu, Yew-Chuhg

AU - Juang, Jenh-Yih

PY - 2012/12/26

Y1 - 2012/12/26

N2 - The structural and optoelectronic properties of ZnO nanopillars (ZnO-NPs) grown on Si substrates by the vapor transport deposition method were investigated. In particular, by varying the deposition duration and hence the morphology of the vertically aligned ZnO-NPs, the resultant field emission characteristics were systematically compared. In addition to identifying the advantageous field emission properties exhibited in the pencil-like ZnO-NPs, we observed that by adhering Au nanoparticles on the surface of the ZnO-NPs the turn-on field and the maximum current density can be drastically improved from 3.15 V/μm and 0.44 mA/cm2 at 5 V/μm for the best ZnO-NPs to 2.65 V/μm and 2.11 mA/cm2 at 5 V/μm for Au/ZnO-NPs, respectively. The enhancement of field emission characteristics that resulted from Au-nanoparticle decoration is discussed on the basis of charge-transfer-induced band structure modifications.

AB - The structural and optoelectronic properties of ZnO nanopillars (ZnO-NPs) grown on Si substrates by the vapor transport deposition method were investigated. In particular, by varying the deposition duration and hence the morphology of the vertically aligned ZnO-NPs, the resultant field emission characteristics were systematically compared. In addition to identifying the advantageous field emission properties exhibited in the pencil-like ZnO-NPs, we observed that by adhering Au nanoparticles on the surface of the ZnO-NPs the turn-on field and the maximum current density can be drastically improved from 3.15 V/μm and 0.44 mA/cm2 at 5 V/μm for the best ZnO-NPs to 2.65 V/μm and 2.11 mA/cm2 at 5 V/μm for Au/ZnO-NPs, respectively. The enhancement of field emission characteristics that resulted from Au-nanoparticle decoration is discussed on the basis of charge-transfer-induced band structure modifications.

KW - Au nanoparticles

KW - ZnO nanopillars

KW - current density

KW - field emission

KW - turn-on field

KW - vapor transport deposition

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DO - 10.1021/am301848a

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VL - 4

SP - 6676

EP - 6682

JO - ACS applied materials & interfaces

JF - ACS applied materials & interfaces

SN - 1944-8244

IS - 12

ER -

Field emission properties of gold nanoparticle-decorated ZnO nanopillars

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