Dependence of field emission of ZnO nanowire on vacuum pressure

Do Hyung Kim; Hyeong Rag Lee

Dependence of field emission of ZnO nanowire on vacuum pressure

Do Hyung Kim, Hyeong Rag Lee

Department of Physics

Kyungpook National University

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

8 Scopus citations

Abstract

The influence of vacuum pressure (VP) on the field emission (FE) properties of ZnO nanowires (ZNWs) were investigated by using in-situ measurements of the emission current and the VP. The FE of ZNWs showed a stable and rapid response to variations in the high-vacuum pressure range from ∼ 10^-6 to 10^-3 Torr at room temperature, showing a straight line plot of log(I) versus log(1/p). From Fowler-Nordheim plots obtained from the current-voltage curves for various values of the VP, a systematic change in the work function was confirmed. The FE dependence on the VP could be attributed to a scalable change in the work function induced by adsorbed molecules and by oxygen vacancies. The ZNWs could represent an alternative mechanism for fingerprinting a variable VP.

Original language	English
Pages (from-to)	L803-L806
Journal	Journal of the Korean Physical Society
Volume	45
Issue number	4
State	Published - Oct 2004

Keywords

Field emission
Vacuum sensor
Work function
ZnO nanowire

Cite this

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title = "Dependence of field emission of ZnO nanowire on vacuum pressure",

abstract = "The influence of vacuum pressure (VP) on the field emission (FE) properties of ZnO nanowires (ZNWs) were investigated by using in-situ measurements of the emission current and the VP. The FE of ZNWs showed a stable and rapid response to variations in the high-vacuum pressure range from ∼ 10-6 to 10-3 Torr at room temperature, showing a straight line plot of log(I) versus log(1/p). From Fowler-Nordheim plots obtained from the current-voltage curves for various values of the VP, a systematic change in the work function was confirmed. The FE dependence on the VP could be attributed to a scalable change in the work function induced by adsorbed molecules and by oxygen vacancies. The ZNWs could represent an alternative mechanism for fingerprinting a variable VP.",

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AU - Kim, Do Hyung

AU - Lee, Hyeong Rag

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N2 - The influence of vacuum pressure (VP) on the field emission (FE) properties of ZnO nanowires (ZNWs) were investigated by using in-situ measurements of the emission current and the VP. The FE of ZNWs showed a stable and rapid response to variations in the high-vacuum pressure range from ∼ 10-6 to 10-3 Torr at room temperature, showing a straight line plot of log(I) versus log(1/p). From Fowler-Nordheim plots obtained from the current-voltage curves for various values of the VP, a systematic change in the work function was confirmed. The FE dependence on the VP could be attributed to a scalable change in the work function induced by adsorbed molecules and by oxygen vacancies. The ZNWs could represent an alternative mechanism for fingerprinting a variable VP.

AB - The influence of vacuum pressure (VP) on the field emission (FE) properties of ZnO nanowires (ZNWs) were investigated by using in-situ measurements of the emission current and the VP. The FE of ZNWs showed a stable and rapid response to variations in the high-vacuum pressure range from ∼ 10-6 to 10-3 Torr at room temperature, showing a straight line plot of log(I) versus log(1/p). From Fowler-Nordheim plots obtained from the current-voltage curves for various values of the VP, a systematic change in the work function was confirmed. The FE dependence on the VP could be attributed to a scalable change in the work function induced by adsorbed molecules and by oxygen vacancies. The ZNWs could represent an alternative mechanism for fingerprinting a variable VP.

KW - Field emission

KW - Vacuum sensor

KW - Work function

KW - ZnO nanowire

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M3 - Article

AN - SCOPUS:8644231082

SN - 0374-4884

VL - 45

SP - L803-L806

JO - Journal of the Korean Physical Society

JF - Journal of the Korean Physical Society

IS - 4

ER -

Dependence of field emission of ZnO nanowire on vacuum pressure

Abstract

Keywords

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