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 journalArticle

58 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 languageEnglish
Pages (from-to)294-301
Number of pages8
JournalSensors and Actuators, B: Chemical
Volume198
DOIs
Publication statusPublished - 2014 Jul 31

Fingerprint

Metal nanoparticles
Chemical sensors
sensors
nanoparticles
Metals
gases
Nanoparticles
Oxides
Catalyst activity
Agglomeration
Gases
metals
agglomeration
metal films
metal oxides
catalytic activity
templates
platforms
augmentation
electronics

Keywords

  • Metal nanoparticles
  • Nanoigloos
  • Sensitization
  • Surface decoration

ASJC Scopus subject areas

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

Cite this

Shim, Y. S., Zhang, L., Kim, D. H., Kim, Y. H., Choi, Y. R., Nahm, S. H., ... Jang, H. W. (2014). Highly sensitive and selective H2 and NO2 gas sensors based on surface-decorated WO3 nanoigloos. Sensors and Actuators, B: Chemical, 198, 294-301. https://doi.org/10.1016/j.snb.2014.03.073

Highly sensitive and selective H2 and NO2 gas sensors based on surface-decorated WO3 nanoigloos. / Shim, Young Seok; Zhang, Lihua; Kim, Do Hong; Kim, Yeon Hoo; Choi, You Rim; Nahm, Seung Hoon; Kang, Chong-Yun; Lee, Wooyoung; Jang, Ho Won.

In: Sensors and Actuators, B: Chemical, Vol. 198, 31.07.2014, p. 294-301.

Research output: Contribution to journalArticle

Shim, YS, Zhang, L, Kim, DH, Kim, YH, Choi, YR, Nahm, SH, Kang, C-Y, Lee, W & Jang, HW 2014, 'Highly sensitive and selective H2 and NO2 gas sensors based on surface-decorated WO3 nanoigloos', Sensors and Actuators, B: Chemical, vol. 198, pp. 294-301. https://doi.org/10.1016/j.snb.2014.03.073
Shim, Young Seok ; Zhang, Lihua ; Kim, Do Hong ; Kim, Yeon Hoo ; Choi, You Rim ; Nahm, Seung Hoon ; Kang, Chong-Yun ; Lee, Wooyoung ; Jang, Ho Won. / Highly sensitive and selective H2 and NO2 gas sensors based on surface-decorated WO3 nanoigloos. In: Sensors and Actuators, B: Chemical. 2014 ; Vol. 198. pp. 294-301.
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