title: Facile fabrication of network film electrodes with ultrathin Au nanowires for nonenzymatic glucose sensing and glucose/O2 fuel cell.
abstract: We report here on the facile fabrication of network film electrodes with ultrathin Au nanowires (AuNWs) and their electrochemical applications for high-performance nonenzymatic glucose sensing and glucose/O2 fuel cell under physiological conditions (pH 7.4, containing 0.15M Cl(-)). AuNWs with an average diameter of ~7 or 2 nm were prepared and can self-assemble into robust network films on common electrodes. The network film electrode fabricated with 2-nm AuNWs exhibits high sensitivity (56.0 μA cm(-2)mM(-1)), low detection limit (20 μM), short response time (within 10s), excellent selectivity, and good storage stability for nonenzymatic glucose sensing. Glucose/O2 fuel cells were constructed using network film electrodes as the anode and commercial Pt/C catalyst modified glassy carbon electrode as cathode. The glucose/O2 fuel cell using 2-nm AuNWs as anode catalyst output a maximum power density of is 126 μW cm(-2), an open-circuit cell voltage of 0.425 V, and a short-circuit current density of 1.34 mA cm(-2), respectively. Due to the higher specific electroactive surface area of 2-nm AuNWs, the network film electrode fabricated with 2-nm AuNWs exhibited higher electrocatalytic activity toward glucose oxidation than the network film electrode fabricated with 7-nm AuNWs. The network film electrode exhibits high electrocatalytic activity toward glucose oxidation under physiological conditions, which is helpful for constructing implantable electronic devices.
authors.affiliation: Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education of China), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, China.
authors.forename: Lu
authors.initials: L
authors.lastname: Yang
authors.forename: Yijia
authors.initials: Y
authors.lastname: Zhang
authors.forename: Mi
authors.initials: M
authors.lastname: Chu
authors.forename: Wenfang
authors.initials: W
authors.lastname: Deng
authors.forename: Yueming
authors.initials: Y
authors.lastname: Tan
authors.forename: Ming
authors.initials: M
authors.lastname: Ma
authors.forename: Xiaoli
authors.initials: X
authors.lastname: Su
authors.forename: Qingji
authors.initials: Q
authors.lastname: Xie
authors.forename: Shuozhuo
authors.initials: S
authors.lastname: Yao
mesh_terms: D015374:Biosensing Techniques / Q000379:methods*; D002244:Carbon / Q000737:chemistry; D002384:Catalysis; D004563:Electrochemistry; D004566:Electrodes; D005947:Glucose / Q000302:isolation & purification*; D006046:Gold / Q000737:chemistry; D053770:Nanowires / Q000737:chemistry*; D010084:Oxidation-Reduction; D010100:Oxygen / Q000302:isolation & purification*
chemical_list: D002244:Carbon; D006046:Gold; D005947:Glucose; D010100:Oxygen
keywords: Glucose/O(2) fuel cell; Network film electrode; Nonenzymatic glucose sensing; Ultrathin Au nanowires