title: Cu₂O-Au nanocomposites for enzyme-free glucose sensing with enhanced performances.
abstract: A facile method for the synthesis of Cu(2)O-Au nanocomposites has been reported by injecting Cu(2)O nanocubes into Au precursor directly with the assistance of ultrasound radiation at room temperature. The ultrasound radiation is not a necessary requirement but can make the distribution of Au nanoparticles more homogenous. The formation of Cu(2)O-Au nanocomposites is attributed to following two reasons. The first one is the difference in the reduction potential between Cu(2+)/Cu(2)O and AuCl(4)(-)/Au, which can also be considered as the driving force for the redox reaction. The other one is the low lattice mismatch between (200) planes of Cu(2)O and (200) facets of Au, which is favorable for the formation of heterostructure. The electrochemical investigation demonstrates that the performances of Cu(2)O nanocubes in enzyme-free glucose sensing have been improved significantly after the decoration of Au nanoparticles which may be derived from the polarization effect provided by Au nanoparticles. As-prepared Cu(2)O-Au nanocomposites have great potential in enzyme-free glucose sensing.
authors.affiliation: Department of Pharmacy, Wannan Medical College, Wuhu 241002, PR China. huqiyan87@wnmc.edu.cn
authors.forename: Qiyan
authors.initials: Q
authors.lastname: Hu
authors.forename: Fenyun
authors.initials: F
authors.lastname: Wang
authors.forename: Zhen
authors.initials: Z
authors.lastname: Fang
authors.forename: Xiaowang
authors.initials: X
authors.lastname: Liu
mesh_terms: D002623:Chemistry Techniques, Analytical; D003300:Copper / Q000737:chemistry*; D005947:Glucose / Q000032:analysis*; D006046:Gold / Q000737:chemistry*; D053761:Nanocomposites / Q000737:chemistry*; D010316:Particle Size; D013499:Surface Properties; D014465:Ultrasonics
chemical_list: D006046:Gold; D003300:Copper; D005947:Glucose; C030973:cupric oxide