Highly sensitive and selective H2 and NO2 gas sensors based on surface-decorated WO3 nanoigloos

Young Seok Shim; Lihua Zhang; Do Hong Kim; Yeon Hoo Kim; You Rim Choi; Seung Hoon Nahm; Chong Yun Kang; Wooyoung Lee; Ho Won Jang

doi:10.1016/j.snb.2014.03.073

Highly sensitive and selective H₂ and NO₂ gas sensors based on surface-decorated WO₃ nanoigloos

Young Seok Shim, Lihua Zhang, Do Hong Kim, Yeon Hoo Kim, You Rim Choi, Seung Hoon Nahm, Chong Yun Kang, Wooyoung Lee, Ho Won Jang

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

106 Citations (Scopus)

Abstract

WO₃ nanoigloos decorated with Ag-, Pd-, and Au nanoparticles are fabricated by soft-template method and self-agglomeration of metal films. The responses of WO₃ nanoigloos decorated with metal nanoparticles to various gases such as NO₂, CH₃COCH₃, C ₂H₅OH, and H₂ are much higher than those of bare WO₃ nanoigloos. According to the surface decoration, WO ₃ nanoigloos show significantly different behaviors in the response enhancement, revealing that Pd-decorated WO₃ nanoigloos exhibit the highest response to H₂ together with fast response time to H ₂, C₂H₅OH, and CH₃COCH₃ (below 10 s), Au-decorated WO₃ nanoigloos exhibit the highest response to NO₂. The catalytic effect of Ag is relatively weaker than Pd and Au nanoparticles, however, it exhibit the fastest response time to NO₂. These are attributed to not only the varied catalytic activities of the metal nanoparticles, but also the different work function energies of them. Our results show that highly sensitive and selective WO₃ nanoigloos decorated with metal nanoparticles can be an effective platform to fabricate an electronic nose for the further application of semiconducting metal oxide gas sensors.

Original language	English
Pages (from-to)	294-301
Number of pages	8
Journal	Sensors and Actuators, B: Chemical
Volume	198
DOIs	https://doi.org/10.1016/j.snb.2014.03.073
Publication status	Published - 2014 Jul 31

Bibliographical note

Funding Information:
This work was financially supported by the Center for Integrated Smart Sensors funded by the Ministry of Science, ICT & Future Planning as the Global Frontier Project, the Outstanding Young Researcher Program, and the Fusion Research Program for Green Technologies through the National Research Foundation of Korea and a research program of the Korea Institute of Science and Technology. WL is grateful for the support of Priority Research Centers Program (2009-0093823) through the National Research Foundation of Korea (NRF). TEM Research carried out in part at the Center for Functional Nanomaterials, Brookhaven National Laboratory, which is supported by the U.S. Department of Energy, Office of Basic Energy Sciences, under Contract No. DE-AC02-98CH10886.

Keywords

Metal nanoparticles
Nanoigloos
Sensitization
Surface decoration

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.2014.03.073

Cite this

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title = "Highly sensitive and selective H2 and NO2 gas sensors based on surface-decorated WO3 nanoigloos",

abstract = "WO3 nanoigloos decorated with Ag-, Pd-, and Au nanoparticles are fabricated by soft-template method and self-agglomeration of metal films. The responses of WO3 nanoigloos decorated with metal nanoparticles to various gases such as NO2, CH3COCH3, C 2H5OH, and H2 are much higher than those of bare WO3 nanoigloos. According to the surface decoration, WO 3 nanoigloos show significantly different behaviors in the response enhancement, revealing that Pd-decorated WO3 nanoigloos exhibit the highest response to H2 together with fast response time to H 2, C2H5OH, and CH3COCH3 (below 10 s), Au-decorated WO3 nanoigloos exhibit the highest response to NO2. The catalytic effect of Ag is relatively weaker than Pd and Au nanoparticles, however, it exhibit the fastest response time to NO2. These are attributed to not only the varied catalytic activities of the metal nanoparticles, but also the different work function energies of them. Our results show that highly sensitive and selective WO3 nanoigloos decorated with metal nanoparticles can be an effective platform to fabricate an electronic nose for the further application of semiconducting metal oxide gas sensors.",

keywords = "Metal nanoparticles, Nanoigloos, Sensitization, Surface decoration",

author = "Shim, {Young Seok} and Lihua Zhang and Kim, {Do Hong} and Kim, {Yeon Hoo} and Choi, {You Rim} and Nahm, {Seung Hoon} and Kang, {Chong Yun} and Wooyoung Lee and Jang, {Ho Won}",

note = "Funding Information: This work was financially supported by the Center for Integrated Smart Sensors funded by the Ministry of Science, ICT & Future Planning as the Global Frontier Project, the Outstanding Young Researcher Program, and the Fusion Research Program for Green Technologies through the National Research Foundation of Korea and a research program of the Korea Institute of Science and Technology. WL is grateful for the support of Priority Research Centers Program (2009-0093823) through the National Research Foundation of Korea (NRF). TEM Research carried out in part at the Center for Functional Nanomaterials, Brookhaven National Laboratory, which is supported by the U.S. Department of Energy, Office of Basic Energy Sciences, under Contract No. DE-AC02-98CH10886. ",

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doi = "10.1016/j.snb.2014.03.073",

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T1 - Highly sensitive and selective H2 and NO2 gas sensors based on surface-decorated WO3 nanoigloos

AU - Shim, Young Seok

AU - Zhang, Lihua

AU - Kim, Do Hong

AU - Kim, Yeon Hoo

AU - Choi, You Rim

AU - Nahm, Seung Hoon

AU - Kang, Chong Yun

AU - Lee, Wooyoung

AU - Jang, Ho Won

N1 - Funding Information: This work was financially supported by the Center for Integrated Smart Sensors funded by the Ministry of Science, ICT & Future Planning as the Global Frontier Project, the Outstanding Young Researcher Program, and the Fusion Research Program for Green Technologies through the National Research Foundation of Korea and a research program of the Korea Institute of Science and Technology. WL is grateful for the support of Priority Research Centers Program (2009-0093823) through the National Research Foundation of Korea (NRF). TEM Research carried out in part at the Center for Functional Nanomaterials, Brookhaven National Laboratory, which is supported by the U.S. Department of Energy, Office of Basic Energy Sciences, under Contract No. DE-AC02-98CH10886.

PY - 2014/7/31

Y1 - 2014/7/31

N2 - WO3 nanoigloos decorated with Ag-, Pd-, and Au nanoparticles are fabricated by soft-template method and self-agglomeration of metal films. The responses of WO3 nanoigloos decorated with metal nanoparticles to various gases such as NO2, CH3COCH3, C 2H5OH, and H2 are much higher than those of bare WO3 nanoigloos. According to the surface decoration, WO 3 nanoigloos show significantly different behaviors in the response enhancement, revealing that Pd-decorated WO3 nanoigloos exhibit the highest response to H2 together with fast response time to H 2, C2H5OH, and CH3COCH3 (below 10 s), Au-decorated WO3 nanoigloos exhibit the highest response to NO2. The catalytic effect of Ag is relatively weaker than Pd and Au nanoparticles, however, it exhibit the fastest response time to NO2. These are attributed to not only the varied catalytic activities of the metal nanoparticles, but also the different work function energies of them. Our results show that highly sensitive and selective WO3 nanoigloos decorated with metal nanoparticles can be an effective platform to fabricate an electronic nose for the further application of semiconducting metal oxide gas sensors.

AB - WO3 nanoigloos decorated with Ag-, Pd-, and Au nanoparticles are fabricated by soft-template method and self-agglomeration of metal films. The responses of WO3 nanoigloos decorated with metal nanoparticles to various gases such as NO2, CH3COCH3, C 2H5OH, and H2 are much higher than those of bare WO3 nanoigloos. According to the surface decoration, WO 3 nanoigloos show significantly different behaviors in the response enhancement, revealing that Pd-decorated WO3 nanoigloos exhibit the highest response to H2 together with fast response time to H 2, C2H5OH, and CH3COCH3 (below 10 s), Au-decorated WO3 nanoigloos exhibit the highest response to NO2. The catalytic effect of Ag is relatively weaker than Pd and Au nanoparticles, however, it exhibit the fastest response time to NO2. These are attributed to not only the varied catalytic activities of the metal nanoparticles, but also the different work function energies of them. Our results show that highly sensitive and selective WO3 nanoigloos decorated with metal nanoparticles can be an effective platform to fabricate an electronic nose for the further application of semiconducting metal oxide gas sensors.

KW - Metal nanoparticles

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KW - Sensitization

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