title: Nanoporous copper oxide ribbon assembly of free-standing nanoneedles as biosensors for glucose.
abstract: Inspired by a sequential hydrolysis-precipitation mechanism, morphology-controllable hierarchical cupric oxide (CuO) nanostructures are facilely fabricated by a green water/ethanol solution-phase transformation of Cu(x)(OH)(2x-2)(SO4) precursors in the absence of any organic capping agents and without annealing treatment in air. Antlerite Cu3(OH)4(SO4) precursors formed in a low volume ratio between water and ethanol can transform into a two-dimensional (2D) hierarchical nanoporous CuO ribbon assembly of free-standing nanoneedle building blocks and hierarchical nanoneedle-aggregated CuO flowers. Brochantite Cu4(OH)6(SO4) precursors formed in a high volume ratio between water and ethanol can transform into hierarchical nanoplate-aggregated CuO nanoribbons and nanoflowers. Such 2D hierarchical nanoporous CuO ribbons serving as a promising electrode material for nonenzymatic glucose detection show high sensitivity, a low detection limit, fast amperometric response and good selectivity. Significantly, this green water-induced precursor-hydrolysis method might be used to control effectively the growth of other metal oxide micro-/nanostructures.
authors.affiliation: School of Science, State Key Laboratory for Mechanical Behavior of Materials, MOE Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter, Collaborative Innovation Center of Suzhou Nano Science and Technology, Xi'an Jiaotong University, Xi'an 710049, ShaanXi, People's Republic of China. zmyang@mail.xjtu.edu.cn.
authors.forename: Shaodong
authors.initials: S
authors.lastname: Sun
authors.forename: Yuexia
authors.initials: Y
authors.lastname: Sun
authors.forename: Anran
authors.initials: A
authors.lastname: Chen
authors.forename: Xiaozhe
authors.initials: X
authors.lastname: Zhang
authors.forename: Zhimao
authors.initials: Z
authors.lastname: Yang
mesh_terms: D015374:Biosensing Techniques; D003300:Copper / Q000737:chemistry*; D055664:Electrochemical Techniques; D004566:Electrodes; D005947:Glucose; D008958:Models, Molecular; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure; D036103:Nanotechnology; D016062:Porosity
chemical_list: D003300:Copper; D005947:Glucose; C030973:cupric oxide