title: Flower-like Copper Cobaltite Nanosheets on Graphite Paper as High-Performance Supercapacitor Electrodes and Enzymeless Glucose Sensors.
abstract: Flower-like copper cobaltite (CuCo2O4) nanosheets anchored on graphite paper have been synthesized using a facile hydrothermal method followed by a postannealing treatment. Supercapacitor electrodes employing CuCo2O4 nanosheets exhibit an enhanced capacitance of 1131 F g(-1) at a current density of 1 A g(-1) compared with previously reported supercapacitor electrodes. The CuCo2O4 electrode delivers a specific capacitance of up to 409 F g(-1) at a current density of as high as 50 A g(-1), and a good long-term cycling stability, with 79.7% of its specific capacitance retained after 5000 cycles at 10 A g(-1). Furthermore, the as-prepared CuCo2O4 nanosheets on graphite paper can be fabricated as electrodes and used as enzymeless glucose sensors, which exhibit good sensitivity (3.625 μA μM(-1) cm(-2)) and an extraordinary linear response ranging up to 320 μM with a low detection limit (5 μM).
authors.affiliation: Department of Materials Science and Engineering, Pusan National University , San 30 Jangjeon-dong, Geumjeong-gu, Busan 609-735, Republic of Korea.
authors.forename: Shude
authors.initials: S
authors.lastname: Liu
authors.affiliation: Department of Mechanical Convergence Engineering, Hanyang University , 17 Haengdang-dong, Seongdong-gu, Seoul 133-791, Republic of Korea.
authors.forename: K S
authors.initials: KS
authors.lastname: Hui
authors.affiliation: Institute of Applied Physics and Materials Engineering, University of Macau , Avenida da Universidade, Taipa, Macau, China.
authors.forename: K N
authors.initials: KN
authors.lastname: Hui
mesh_terms: D015374:Biosensing Techniques; D003300:Copper / Q000737:chemistry*; D005947:Glucose / Q000302:isolation & purification*; D006108:Graphite / Q000737:chemistry; D006801:Humans; D057230:Limit of Detection; D008903:Minerals / Q000737:chemistry; D049329:Nanostructures / Q000737:chemistry*
chemical_list: D008903:Minerals; C560917:cobaltite; D006108:Graphite; D003300:Copper; D005947:Glucose
keywords: copper cobaltite; glucose sensor; hydrothermal method; nanosheets; supercapacitors