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 2024-01-20T09:32:00Z 2024-01-20T09:32:00Z 2021-09-05 2014-07 0925-4005 https://pubs.kist.re.kr/handle/201004/126640 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 nanoparticies to various gases such as NO2, CH3COCH3, C2H5OH, and H-2 are much higher than those of bare WO3 nanoigloos. According to the surface decoration, WO3 nanigloos show significantly different behaviors in the response enhancement, revealing that Pd-decorated WO3 nanoigloos exhibit the highest response to H-2 together with fast response time to H-2,H- C2H5OH, and CH3COCH3 (below 10s),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. (C) 2014 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE SA ELECTRONIC NOSE THIN-FILMS AU CATALYSIS NANONEEDLES PERFORMANCE Highly sensitive and selective H-2 and NO2 gas sensors based on surface-decorated WO3 nanoigloos Article 10.1016/j.snb.2014.03.073 1 SENSORS AND ACTUATORS B-CHEMICAL, v.198, pp.294 - 301 SENSORS AND ACTUATORS B-CHEMICAL 198 294 301 scie scopus 000335580100043 2-s2.0-84898614131 Chemistry, Analytical Electrochemistry Instruments & Instrumentation Chemistry Electrochemistry Instruments & Instrumentation Article ELECTRONIC NOSE THIN-FILMS AU CATALYSIS NANONEEDLES PERFORMANCE WO3 Nanoigloos Surface decoration Metal nanoparticles Sensitization