title: Alternating Current Dielectrophoresis Optimization of Pt-Decorated Graphene Oxide Nanostructures for Proficient Hydrogen Gas Sensor.
abstract: Alternating current dielectrophoresis (DEP) is an excellent technique to assemble nanoscale materials. For efficient DEP, the optimization of the key parameters like peak-to-peak voltage, applied frequency, and processing time is required for good device. In this work, we have assembled graphene oxide (GO) nanostructures mixed with platinum (Pt) nanoparticles between the micro gap electrodes for a proficient hydrogen gas sensors. The Pt-decorated GO nanostructures were well located between a pair of prepatterned Ti/Au electrodes by controlling the DEP technique with the optimized parameters and subsequently thermally reduced before sensing. The device fabricated using the DEP technique with the optimized parameters showed relatively high sensitivity (∼10%) to 200 ppm hydrogen gas at room temperature. The results indicates that the device could be used in several industry applications, such as gas storage and leak detection.
authors.affiliation: †Samsung-SKKU Graphene Center, Sungkyunkwan Advanced Institute of Nanotechnology (SAINT) and School of Electronic and Electrical Engineering, Sungkyunkwan University, Suwon, Gyeonggi-do 440-746, Republic of Korea.|#School of Mechanical and Electrical Engineering, Guizhou Normal University, Guiyang 550002, China.
authors.forename: Jianwei
authors.initials: J
authors.lastname: Wang
authors.affiliation: †Samsung-SKKU Graphene Center, Sungkyunkwan Advanced Institute of Nanotechnology (SAINT) and School of Electronic and Electrical Engineering, Sungkyunkwan University, Suwon, Gyeonggi-do 440-746, Republic of Korea.
authors.forename: Servin
authors.initials: S
authors.lastname: Rathi
authors.affiliation: †Samsung-SKKU Graphene Center, Sungkyunkwan Advanced Institute of Nanotechnology (SAINT) and School of Electronic and Electrical Engineering, Sungkyunkwan University, Suwon, Gyeonggi-do 440-746, Republic of Korea.
authors.forename: Budhi
authors.initials: B
authors.lastname: Singh
authors.affiliation: †Samsung-SKKU Graphene Center, Sungkyunkwan Advanced Institute of Nanotechnology (SAINT) and School of Electronic and Electrical Engineering, Sungkyunkwan University, Suwon, Gyeonggi-do 440-746, Republic of Korea.
authors.forename: Inyeal
authors.initials: I
authors.lastname: Lee
authors.affiliation: §Institute of Advanced Composite Materials, Korea Institute of Science and Technology 864-9, Dunsan-ri, Bongdong-eup, Wanju-gun, Jeollabukdo 565-902, Republic of Korea.
authors.forename: Han-Ik
authors.initials: HI
authors.lastname: Joh
authors.affiliation: †Samsung-SKKU Graphene Center, Sungkyunkwan Advanced Institute of Nanotechnology (SAINT) and School of Electronic and Electrical Engineering, Sungkyunkwan University, Suwon, Gyeonggi-do 440-746, Republic of Korea.
authors.forename: Gil-Ho
authors.initials: GH
authors.lastname: Kim
keywords: Pt nanoparticles; dielectrophoresis; hydrogen gas sensing; nano device; reduced graphene oxide