title: Direct electrodeposition of cable-like CuO@Cu nanowires array for non-enzymatic sensing.
abstract: Vertically aligned cable-like CuO@Cu nanowires array was synthesized using a template-directed electrodeposition strategy. The morphology, crystal structure, and surface property of nanowires array were investigated by SEM, HRTEM, XRD, and XPS, respectively. It is found that the free standing namowires are highly dense, and possess about 20 μm in length and 200 nm in diameter. The bulk Cu nanowires are assembled by a number of single crystalline Cu nanoparticles and surface is wrapped by a thin layer of amorphous CuO with size of 2.5 nm. Electrocatalytic activity of the nanowires array towards glucose oxidation was investigated by cyclic voltammetry and amperometry in alkaline media. The nanowires array with 3×3 mm(2) was then used to fabricate a non-enzymatic glucose sensor. The sensor exhibits a wide concentration range of 1×10(-6)M-1×10(-2) M for glucose, with an ultra-high sensitivity of 1250.8 μA mM(-1) cm(-2) and excellent anti-interference ability. The good sensing performances could be attributed to the integration of the superior electrocatalysis of high density of Cu nanowires array and the outer shell of negatively charged CuO against interferences.
authors.affiliation: Department of Chemistry, College of Science, Shanghai University, Shanghai 200444, China; State Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai, 200050, China. Electronic address: jpdong@shu.edu.cn.
authors.forename: Junping
authors.initials: J
authors.lastname: Dong
authors.affiliation: Department of Chemistry, College of Science, Shanghai University, Shanghai 200444, China.
authors.forename: Linxiao
authors.initials: L
authors.lastname: Ren
authors.affiliation: Department of Chemistry, College of Science, Shanghai University, Shanghai 200444, China; State Key Laboratory of Transducer Technology, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai, 200050, China.
authors.forename: Yuan
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Department of Materials Science, Fudan University, Shanghai, 200433, China.
authors.forename: Xiaoli
authors.initials: X
authors.lastname: Cui
authors.affiliation: Laboratory of Microstructures, Shanghai University, Shanghai 200444, China.
authors.forename: Pengfei
authors.initials: P
authors.lastname: Hu
authors.affiliation: Department of Chemistry, College of Science, Shanghai University, Shanghai 200444, China. Electronic address: xujiaqiang@shu.edu.cn.
authors.forename: Jiaqiang
authors.initials: J
authors.lastname: Xu
mesh_terms: D003300:Copper / Q000737:chemistry*; D004595:Electroplating / Q000379:methods*; D005947:Glucose / Q000032:analysis* / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D008855:Microscopy, Electron, Scanning; D053770:Nanowires / Q000737:chemistry* / Q000648:ultrastructure; D010084:Oxidation-Reduction; D012996:Solutions; D013499:Surface Properties
chemical_list: D012996:Solutions; D003300:Copper; D005947:Glucose; C030973:cupric oxide
keywords: CuO@Cu nanowires array; Electrodeposition; Glucose; Non-enzymatic sensor