Wang, Jianwei Rathi, Servin Singh, Budhi Lee, Inyeal Maeng, Sunglyul Joh, Han-Ik Kim, Gil-Ho 2024-01-20T05:31:21Z 2024-01-20T05:31:21Z 2021-09-03 2015-12-01 0925-4005 https://pubs.kist.re.kr/handle/201004/124639 Reduced graphene oxide (rGO) gas sensors functionalized with platinum (Pt) nanoparticles were fabricated. An alternating current dielectrophoresis technique was used for the precise alignment of the Pt-GO nanohybrid between microgap electrodes, proceeded by the mid-temperature thermal annealing. The gas sensing response was determined for the assembled rGO nanostructure-based devices with and without Pt decoration at various ambient temperature and gas concentrations. The tested device exhibited sensitivities of 14% (7%), 8% (5%), and 10% (8%), for 1000 ppm hydrogen, ammonia, and nitric oxide gases, respectively with ( without) Pt nanoparticles, at room temperature. The Pt-decorated samples show an improvement of 100%, 60% and 25% to hydrogen, ammonia, and nitric oxide gases, respectively, over without Pt decorated sensors. Besides, improving the sensitivity, the dielectrophoresis assembled rGO-Pt nanohybrid sensors have been demonstrated as a viable material for multiple gas sensors. (C) 2015 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE SA CARBON NANOTUBES THIN-FILMS Dielectrophoretic assembly of Pt nanoparticle-reduced graphene oxide nanohybrid for highly-sensitive multiple gas sensor Article 10.1016/j.snb.2015.05.133 1 SENSORS AND ACTUATORS B-CHEMICAL, v.220, pp.755 - 761 SENSORS AND ACTUATORS B-CHEMICAL 220 755 761 scie scopus 000361249100100 2-s2.0-84934975179 Chemistry, Analytical Electrochemistry Instruments & Instrumentation Chemistry Electrochemistry Instruments & Instrumentation Article CARBON NANOTUBES THIN-FILMS Graphene oxide Pt nanoparticles Nanohybrid Dielectrophoresis Gas sensors