title: Sonochemical fabrication of twinned ZnO hollow ellipses for electrochemical biosensing.
abstract: Twinned ZnO hollow ellipses (ZnO HEs) have been successfully fabricated by a one-step template-free sonochemical route. The products were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results showed that the ZnO HEs had a hexagonal wurtzite structure, the wall of which was composed of ZnO nanorods. A possible growth mechanism for the formation of ZnO HEs was proposed, in which sonication played a crucial role. The highly efficient H2O2 electrochemical biosensor was fabricated using the film immobilized with hemoglobin, ZnO HEs and chitosan on glassy carbon electrode. The biosensor showed high stability and excellent electrocatalytic activity toward H2O2 with a linear range from 0.5 to 250 microM and a detection limit of 0.15 microM.
authors.affiliation: State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China.
authors.forename: Abulikemu
authors.initials: A
authors.lastname: Abulizil
authors.forename: Guo-Hai
authors.initials: GH
authors.lastname: Yang
authors.forename: Feng
authors.initials: F
authors.lastname: Lu
authors.forename: Rohit Kumar
authors.initials: RK
authors.lastname: Rana
authors.forename: Jun-Jie
authors.initials: JJ
authors.lastname: Zhu
mesh_terms: D015374:Biosensing Techniques; D055664:Electrochemical Techniques / Q000295:instrumentation*; D008855:Microscopy, Electron, Scanning; D046529:Microscopy, Electron, Transmission; D014961:X-Ray Diffraction; D015034:Zinc Oxide / Q000737:chemistry*
chemical_list: D015034:Zinc Oxide