title: 3D graphene foam as a monolithic and macroporous carbon electrode for electrochemical sensing.
abstract: Graphene, a single-atom-thick monolayer of sp(2) carbon atoms perfectly arranged in a honeycomb lattice, is an emerging sensing material because of its extraordinary properties, such as exceptionally high specific surface area, electrical conductivity, and electrochemical potential window. In this study, we demonstrate that three-dimensional (3D), macroporous, highly conductive, and monolithic graphene foam synthesized by chemical vapor deposition represents a novel architecture for electrochemical electrodes. Being employed as an electrochemical sensor for detection of dopamine, 3D graphene electrode exhibits remarkable sensitivity (619.6 μA mM(-1) cm(-2)) and lower detection limit (25 nM at a signal-to-noise ratio of 5.6), with linear response up to ∼25 μM. And the oxidation peak of dopamine can be easily distinguished from that of uric acid - a common interferent to dopamine detection. We envision that the graphene foam provides a promising platform for the development of electrochemical sensors as well as other applications, such as energy storage and conversion.
authors.affiliation: Key Laboratory for Organic Electronics & Information Displays, Institute of Advanced Materials, Nanjing University of Posts and Telecommunications , 9 Wenyuan Road, Nanjing, 210046, China.
authors.forename: Xiaochen
authors.initials: X
authors.lastname: Dong
authors.forename: Xuewan
authors.initials: X
authors.lastname: Wang
authors.forename: Lianhui
authors.initials: L
authors.lastname: Wang
authors.forename: Hao
authors.initials: H
authors.lastname: Song
authors.forename: Hua
authors.initials: H
authors.lastname: Zhang
authors.forename: Wei
authors.initials: W
authors.lastname: Huang
authors.forename: Peng
authors.initials: P
authors.lastname: Chen
mesh_terms: D015374:Biosensing Techniques; D002244:Carbon / Q000737:chemistry*; D004298:Dopamine / Q000032:analysis; D055664:Electrochemical Techniques; D004566:Electrodes; D006108:Graphite / Q000737:chemistry*; D016062:Porosity; D014527:Uric Acid / Q000032:analysis
chemical_list: D014527:Uric Acid; D002244:Carbon; D006108:Graphite; D004298:Dopamine