Vapor-phase growth of urchin-like Mg-doped ZnO nanowire networks and their application to highly sensitive and selective detection of ethanol

Chang Hoon Kwak; Hyung Sik Woo; Faissal Abdel-Hady; A. A. Wazzan; Jong Heun Lee

doi:10.1016/j.snb.2015.09.120

Vapor-phase growth of urchin-like Mg-doped ZnO nanowire networks and their application to highly sensitive and selective detection of ethanol

Chang Hoon Kwak, Hyung Sik Woo, Faissal Abdel-Hady, A. A. Wazzan, Jong Heun Lee

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

45 Citations (Scopus)

Abstract

Urchin-like Mg-doped ZnO nanowire networks were prepared by MgO-seeded vapor-phase growth of ZnO nanowires, and their potential as gas-sensing materials was investigated. The response (resistance ratio) of the urchin-like Mg-doped ZnO nanowire networks to 5 ppm C₂H₅OH at 350 °C was as high as 343, which is significantly higher than that of pure ZnO nanowire networks (7.0). In addition, the Mg-doped ZnO nanowire network sensors showed excellent selectivity to C₂H₅OH and an unprecedentedly high response (28.8) even to 0.25 ppm C₂H₅OH. The enhancement of the gas response and selectivity to C₂H₅OH was attributed to Mg-doping-induced decrease of the charge carrier concentration, the change of nanowire thickness/morphology, and the catalytic promotion of the C₂H₅OH sensing reaction.

Original language	English
Pages (from-to)	527-534
Number of pages	8
Journal	Sensors and Actuators, B: Chemical
Volume	223
DOIs	https://doi.org/10.1016/j.snb.2015.09.120
Publication status	Published - 2016 Feb 1

Keywords

Gas response
Gas sensor
Mg-doped ZnO
Oxide nanowire network
Selectivity

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Instrumentation
Condensed Matter Physics
Surfaces, Coatings and Films
Metals and Alloys
Electrical and Electronic Engineering
Materials Chemistry

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title = "Vapor-phase growth of urchin-like Mg-doped ZnO nanowire networks and their application to highly sensitive and selective detection of ethanol",

abstract = "Urchin-like Mg-doped ZnO nanowire networks were prepared by MgO-seeded vapor-phase growth of ZnO nanowires, and their potential as gas-sensing materials was investigated. The response (resistance ratio) of the urchin-like Mg-doped ZnO nanowire networks to 5 ppm C2H5OH at 350 °C was as high as 343, which is significantly higher than that of pure ZnO nanowire networks (7.0). In addition, the Mg-doped ZnO nanowire network sensors showed excellent selectivity to C2H5OH and an unprecedentedly high response (28.8) even to 0.25 ppm C2H5OH. The enhancement of the gas response and selectivity to C2H5OH was attributed to Mg-doping-induced decrease of the charge carrier concentration, the change of nanowire thickness/morphology, and the catalytic promotion of the C2H5OH sensing reaction.",

keywords = "Gas response, Gas sensor, Mg-doped ZnO, Oxide nanowire network, Selectivity",

author = "Kwak, {Chang Hoon} and Woo, {Hyung Sik} and Faissal Abdel-Hady and Wazzan, {A. A.} and Lee, {Jong Heun}",

note = "Funding Information: This work is supported by the Deanship of Scientific Research (DSR), King Abdulaziz University (KAU), under grant No. 2-135-36-HiCi , and a National Research Foundation of Korea (NRF) grant funded by the Korea Government (MEST) (No. 2013R1A2A1A01006545 ). The authors, therefore, acknowledge the technical and financial support of KAU and MEST. Publisher Copyright: {\textcopyright} 2015 Elsevier B.V. All rights reserved.",

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doi = "10.1016/j.snb.2015.09.120",

language = "English",

volume = "223",

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T1 - Vapor-phase growth of urchin-like Mg-doped ZnO nanowire networks and their application to highly sensitive and selective detection of ethanol

AU - Kwak, Chang Hoon

AU - Woo, Hyung Sik

AU - Abdel-Hady, Faissal

AU - Wazzan, A. A.

AU - Lee, Jong Heun

N1 - Funding Information: This work is supported by the Deanship of Scientific Research (DSR), King Abdulaziz University (KAU), under grant No. 2-135-36-HiCi , and a National Research Foundation of Korea (NRF) grant funded by the Korea Government (MEST) (No. 2013R1A2A1A01006545 ). The authors, therefore, acknowledge the technical and financial support of KAU and MEST. Publisher Copyright: © 2015 Elsevier B.V. All rights reserved.

PY - 2016/2/1

Y1 - 2016/2/1

N2 - Urchin-like Mg-doped ZnO nanowire networks were prepared by MgO-seeded vapor-phase growth of ZnO nanowires, and their potential as gas-sensing materials was investigated. The response (resistance ratio) of the urchin-like Mg-doped ZnO nanowire networks to 5 ppm C2H5OH at 350 °C was as high as 343, which is significantly higher than that of pure ZnO nanowire networks (7.0). In addition, the Mg-doped ZnO nanowire network sensors showed excellent selectivity to C2H5OH and an unprecedentedly high response (28.8) even to 0.25 ppm C2H5OH. The enhancement of the gas response and selectivity to C2H5OH was attributed to Mg-doping-induced decrease of the charge carrier concentration, the change of nanowire thickness/morphology, and the catalytic promotion of the C2H5OH sensing reaction.

AB - Urchin-like Mg-doped ZnO nanowire networks were prepared by MgO-seeded vapor-phase growth of ZnO nanowires, and their potential as gas-sensing materials was investigated. The response (resistance ratio) of the urchin-like Mg-doped ZnO nanowire networks to 5 ppm C2H5OH at 350 °C was as high as 343, which is significantly higher than that of pure ZnO nanowire networks (7.0). In addition, the Mg-doped ZnO nanowire network sensors showed excellent selectivity to C2H5OH and an unprecedentedly high response (28.8) even to 0.25 ppm C2H5OH. The enhancement of the gas response and selectivity to C2H5OH was attributed to Mg-doping-induced decrease of the charge carrier concentration, the change of nanowire thickness/morphology, and the catalytic promotion of the C2H5OH sensing reaction.

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KW - Gas sensor

KW - Mg-doped ZnO

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KW - Selectivity

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Vapor-phase growth of urchin-like Mg-doped ZnO nanowire networks and their application to highly sensitive and selective detection of ethanol

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