title: 3D graphene-cobalt oxide electrode for high-performance supercapacitor and enzymeless glucose detection.
abstract: Using a simple hydrothermal procedure, cobalt oxide (Co(3)O(4)) nanowires were in situ synthesized on three-dimensional (3D) graphene foam grown by chemical vapor deposition. The structure and morphology of the resulting 3D graphene/Co(3)O(4) composites were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and Raman spectroscopy. The 3D graphene/Co(3)O(4) composite was used as the monolithic free-standing electrode for supercapacitor application and for enzymeless electrochemical detection of glucose. We demonstrate that it is capable of delivering high specific capacitance of ∼1100 F g(-1) at a current density of 10 A g(-1) with excellent cycling stability, and it can detect glucose with a ultrahigh sensitivity of 3.39 mA mM(-1) cm(-2) and a remarkable lower detection limit of <25 nM (S/N = 8.5).
authors.affiliation: Key Laboratory for Organic Electronics & Information Displays (KLOEID), Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications (NUPT), 9 Wenyuan Road, Nanjing, 210046, China. iamxcdong@njupt.edu.cn
authors.forename: Xiao-Chen
authors.initials: XC
authors.lastname: Dong
authors.forename: Hang
authors.initials: H
authors.lastname: Xu
authors.forename: Xue-Wan
authors.initials: XW
authors.lastname: Wang
authors.forename: Yin-Xi
authors.initials: YX
authors.lastname: Huang
authors.forename: Mary B
authors.initials: MB
authors.lastname: Chan-Park
authors.forename: Hua
authors.initials: H
authors.lastname: Zhang
authors.forename: Lian-Hui
authors.initials: LH
authors.lastname: Wang
authors.forename: Wei
authors.initials: W
authors.lastname: Huang
authors.forename: Peng
authors.initials: P
authors.lastname: Chen
mesh_terms: D003035:Cobalt / Q000737:chemistry*; D025802:Electric Capacitance; D004563:Electrochemistry; D004566:Electrodes; D005947:Glucose / Q000032:analysis* / Q000737:chemistry; D006108:Graphite / Q000737:chemistry*; D036103:Nanotechnology / Q000379:methods*; D053770:Nanowires / Q000737:chemistry; D010087:Oxides / Q000737:chemistry*
chemical_list: D010087:Oxides; D003035:Cobalt; D006108:Graphite; D005947:Glucose; C060728:cobalt oxide