title: The effects of ionic liquid on the electrochemical sensing performance of graphene- and carbon nanotube-based electrodes.
abstract: The electrochemical sensing properties of graphene-based and carbon nanotube (CNT)-based electrodes towards ascorbic acid, dopamine, uric acid, and glucose are systematically compared. Nano-sized Pd catalyst particles are uniformly dispersed on both carbon supports using a supercritical fluid deposition technique to increase the sensing performance. The CNT/Pd electrode shows higher detection current than that of the graphene/Pd electrode, which is attributed to the three-dimensional architecture interwoven by the CNTs that creates a larger number of reaction sites. With the incorporation of ionic liquid (IL), the detection sensitivity of the IL/graphene/Pd electrode significantly increases, becoming noticeably higher than that of the IL/CNT/Pd counterpart. The synergistic interactions between graphene and IL that lead to the superior sensing performance are demonstrated and discussed.
authors.affiliation: Institute of Materials Science and Engineering, 300 Jhongda Road, Taoyuan 32001, Taiwan.
authors.forename: Chueh-Han
authors.initials: CH
authors.lastname: Wang
authors.forename: Cheng-Hung
authors.initials: CH
authors.lastname: Wu
authors.forename: Jia-Wun
authors.initials: JW
authors.lastname: Wu
authors.forename: Ming-Tsung
authors.initials: MT
authors.lastname: Lee
authors.forename: Jeng-Kuei
authors.initials: JK
authors.lastname: Chang
authors.forename: Ming-Der
authors.initials: MD
authors.lastname: Ger
authors.forename: Chia-Liang
authors.initials: CL
authors.lastname: Sun
mesh_terms: D001205:Ascorbic Acid / Q000032:analysis*; D015374:Biosensing Techniques; D002384:Catalysis; D004298:Dopamine / Q000032:analysis*; D055664:Electrochemical Techniques; D004566:Electrodes; D006108:Graphite / Q000737:chemistry; D052578:Ionic Liquids / Q000737:chemistry; D037742:Nanotubes, Carbon / Q000737:chemistry*; D010165:Palladium / Q000737:chemistry; D014527:Uric Acid / Q000032:analysis*
chemical_list: D052578:Ionic Liquids; D037742:Nanotubes, Carbon; D014527:Uric Acid; D010165:Palladium; D006108:Graphite; D001205:Ascorbic Acid; D004298:Dopamine