Effects of gas exposure on the field-emission properties of ZnO nanorods

Do Hyung Kim; Hoon Sik Jang; Sung Youp Lee; Hyeong Rag Lee

doi:10.1088/0957-4484/15/11/008

Effects of gas exposure on the field-emission properties of ZnO nanorods

Do Hyung Kim, Hoon Sik Jang, Sung Youp Lee, Hyeong Rag Lee

Department of Physics

Kyungpook National University

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

30 Scopus citations

Abstract

The effect of diverse gases on the field emission (FE) properties of ZnO nanorods was investigated. The FE properties of nanorods were fully recovered after evacuating to the initial pressure, even after an abrupt current drop under severe vacuum conditions of ∼2 × 10^-4 Torr induced by the presence of O₂, N₂, Ar and air. The reversible and sensitive response of the FE of the nanorods with variation in pressure was found for all gases tested except for H₂. Exposure of H₂ causes a permanent increase in the FE current and a decrease in the turn-on field. The pressure-dependent field emission behaviour of nanorods must be considered when field emission data are compared and characterized.

Original language	English
Pages (from-to)	1433-1436
Number of pages	4
Journal	Nanotechnology
Volume	15
Issue number	11
DOIs	https://doi.org/10.1088/0957-4484/15/11/008
State	Published - Nov 2004

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abstract = "The effect of diverse gases on the field emission (FE) properties of ZnO nanorods was investigated. The FE properties of nanorods were fully recovered after evacuating to the initial pressure, even after an abrupt current drop under severe vacuum conditions of ∼2 × 10-4 Torr induced by the presence of O2, N2, Ar and air. The reversible and sensitive response of the FE of the nanorods with variation in pressure was found for all gases tested except for H2. Exposure of H2 causes a permanent increase in the FE current and a decrease in the turn-on field. The pressure-dependent field emission behaviour of nanorods must be considered when field emission data are compared and characterized.",

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AB - The effect of diverse gases on the field emission (FE) properties of ZnO nanorods was investigated. The FE properties of nanorods were fully recovered after evacuating to the initial pressure, even after an abrupt current drop under severe vacuum conditions of ∼2 × 10-4 Torr induced by the presence of O2, N2, Ar and air. The reversible and sensitive response of the FE of the nanorods with variation in pressure was found for all gases tested except for H2. Exposure of H2 causes a permanent increase in the FE current and a decrease in the turn-on field. The pressure-dependent field emission behaviour of nanorods must be considered when field emission data are compared and characterized.

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Effects of gas exposure on the field-emission properties of ZnO nanorods

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