Necked ZnO nanoparticle-based NO2 sensors with high and fast response

Jin Hyung Jun; Junggwon Yun; Kyoungah Cho; In Sung Hwang; Jong Heun Lee; Sangsig Kim

doi:10.1016/j.snb.2009.05.019

Necked ZnO nanoparticle-based NO₂ sensors with high and fast response

Jin Hyung Jun, Junggwon Yun, Kyoungah Cho, In Sung Hwang, Jong Heun Lee, Sangsig Kim

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

99 Citations (Scopus)

Abstract

The NO₂ gas sensing characteristics of semiconductor type gas sensors with channels composed of necked ZnO nanoparticles (NPs) were investigated in this study. The heat treatment of the NPs at 400 °C led to their necking and coarsening. The response of the necked-NP-based sensors was as high as 100 when exposed to 0.2 ppm of NO₂ at 200 °C. As the concentration of NO₂ increased to 5 ppm, their response was enhanced to approximately 400. During the repeated injection of NO₂ gas with a concentration of 0.4 ppm, the sensors exhibited stable response characteristics. Furthermore, the 90% response and recovery times of the gas sensor were as fast as 13 and 10 s, respectively. These observations indicate that the non-agglomerated necking of the NPs induced by the heat treatment significantly enhances the gas sensing characteristics of the NP-based gas sensors.

Original language	English
Pages (from-to)	412-417
Number of pages	6
Journal	Sensors and Actuators, B: Chemical
Volume	140
Issue number	2
DOIs	https://doi.org/10.1016/j.snb.2009.05.019
Publication status	Published - 2009 Jul 16

Bibliographical note

Funding Information:
This work was supported by the Center for Integrated-Nano-Systems (CINS) of the Korea Research Foundation (KRF-2006-005-J03601), the Medium-term Strategic Technology Development Program, the “SystemIC2010” project of the Korea Ministry of Commerce, Industry and Energy, the IT R&D program of MIC/IITA (2007-S-078-02, Environmental Sensing and Alerting System with Nanowires and Nanotubes), the National Research Lab. Program (R0A-2005-000-10045-0 (2008) and R0A-2008-000-20032-0), and the Nano R&D Program (M10703000980-08M0300-98010), and World Class University (WCU, R32-2008-000-10082-0) Project of the Ministry of Education, Science and Technology (Korea Science and Engineering Foundation).

Keywords

Gas sensor
NO
Non-agglomerated necking
Response
ZnO nanoparticles

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

Access to Document

10.1016/j.snb.2009.05.019

Cite this

@article{021244520a634c61a4bd08d69afa7483,

title = "Necked ZnO nanoparticle-based NO2 sensors with high and fast response",

abstract = "The NO2 gas sensing characteristics of semiconductor type gas sensors with channels composed of necked ZnO nanoparticles (NPs) were investigated in this study. The heat treatment of the NPs at 400 °C led to their necking and coarsening. The response of the necked-NP-based sensors was as high as 100 when exposed to 0.2 ppm of NO2 at 200 °C. As the concentration of NO2 increased to 5 ppm, their response was enhanced to approximately 400. During the repeated injection of NO2 gas with a concentration of 0.4 ppm, the sensors exhibited stable response characteristics. Furthermore, the 90% response and recovery times of the gas sensor were as fast as 13 and 10 s, respectively. These observations indicate that the non-agglomerated necking of the NPs induced by the heat treatment significantly enhances the gas sensing characteristics of the NP-based gas sensors.",

keywords = "Gas sensor, NO, Non-agglomerated necking, Response, ZnO nanoparticles",

author = "Jun, {Jin Hyung} and Junggwon Yun and Kyoungah Cho and Hwang, {In Sung} and Lee, {Jong Heun} and Sangsig Kim",

note = "Funding Information: This work was supported by the Center for Integrated-Nano-Systems (CINS) of the Korea Research Foundation (KRF-2006-005-J03601), the Medium-term Strategic Technology Development Program, the “SystemIC2010” project of the Korea Ministry of Commerce, Industry and Energy, the IT R&D program of MIC/IITA (2007-S-078-02, Environmental Sensing and Alerting System with Nanowires and Nanotubes), the National Research Lab. Program (R0A-2005-000-10045-0 (2008) and R0A-2008-000-20032-0), and the Nano R&D Program (M10703000980-08M0300-98010), and World Class University (WCU, R32-2008-000-10082-0) Project of the Ministry of Education, Science and Technology (Korea Science and Engineering Foundation). ",

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AU - Yun, Junggwon

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AU - Lee, Jong Heun

AU - Kim, Sangsig

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N2 - The NO2 gas sensing characteristics of semiconductor type gas sensors with channels composed of necked ZnO nanoparticles (NPs) were investigated in this study. The heat treatment of the NPs at 400 °C led to their necking and coarsening. The response of the necked-NP-based sensors was as high as 100 when exposed to 0.2 ppm of NO2 at 200 °C. As the concentration of NO2 increased to 5 ppm, their response was enhanced to approximately 400. During the repeated injection of NO2 gas with a concentration of 0.4 ppm, the sensors exhibited stable response characteristics. Furthermore, the 90% response and recovery times of the gas sensor were as fast as 13 and 10 s, respectively. These observations indicate that the non-agglomerated necking of the NPs induced by the heat treatment significantly enhances the gas sensing characteristics of the NP-based gas sensors.

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