title: A new preparation of Au nanoplates and their application for glucose sensing.
abstract: The present communication demonstrates a relatively green preparative route toward Au nanoplates in aqueous solution at room temperature with the use of tannic acid (TA), which is an environmentally friendly, soluble polyphenol, as a reducing agent. Such Au nanoplates exhibit notable catalytic performance toward the oxidation and reduction of H(2)O(2). A glucose biosensor was further fabricated by immobilizing glucose oxidase (GOD) into chitosan-Au nanoplate composites film on the surface of glassy carbon electrode (GCE). This sensor exhibits good response to glucose, and the linear response range is estimated to be from 2 to 20 mM (R=0.999) at 0.65 V and from 2 to 10 mM (R=0.993) at -0.2 V, respectively. The sensitivity of the sensor determined from the slopes is 49.5 μA mM(-1)cm(-2) at 0.65 V.
authors.affiliation: State Key Lab of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Changchun 130022, Jilin, PR China.
authors.forename: Yingwei
authors.initials: Y
authors.lastname: Zhang
authors.forename: Guohui
authors.initials: G
authors.lastname: Chang
authors.forename: Sen
authors.initials: S
authors.lastname: Liu
authors.forename: Wenbo
authors.initials: W
authors.lastname: Lu
authors.forename: Jingqi
authors.initials: J
authors.lastname: Tian
authors.forename: Xuping
authors.initials: X
authors.lastname: Sun
mesh_terms: D015374:Biosensing Techniques / Q000379:methods*; D001786:Blood Glucose / Q000032:analysis; D048271:Chitosan / Q000737:chemistry; D005947:Glucose / Q000032:analysis*; D005949:Glucose Oxidase / Q000737:chemistry; D006046:Gold / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry; D053768:Metal Nanoparticles / Q000737:chemistry*; D053761:Nanocomposites / Q000737:chemistry*; D010084:Oxidation-Reduction
chemical_list: D001786:Blood Glucose; D006046:Gold; D048271:Chitosan; D006861:Hydrogen Peroxide; D005949:Glucose Oxidase; D005947:Glucose