title: Electrochemical behavior of gold nanoparticles modified nitrogen incorporated tetrahedral amorphous carbon and its application in glucose sensing.
abstract: Gold nanoparticles (NPs) with 10-50 nm in diameter were synthesized on nitrogen incorporated tetrahedral amorphous carbon (ta-C:N) thin film electrode by electrodeposition. The deposition and nucleation processes of Au on ta-C:N surface were investigated by cyclic voltammetry and chronoamperometry. The morphology of Au NPs was characterized by scanned electron microscopy. The electrochemical properties of Au NPs modified ta-C:N (ta-C:N/Au) electrode and its ability to sense glucose were investigated by voltammetric and amperometric measurements. The potentiostatic current-time transients showed a progressive nucleation process and diffusion growth of Au on the surface of ta-C:N film according to the Scharifker-Hills model. The Au NPs acted as microelectrodes improved the electron transfer and electrocatalytic oxidation of glucose on ta-C:N electrode. The ta-C:N/Au electrode exhibited fast current response, a linear detection range of glucose from 0.5 to 25 mM and a detection limit of 120 microM, which hinted its potential application as a glucose biosensor.
authors.affiliation: Department of Physics, Center for Optoelectronics Materials and Devices, Zhejiang Sci-Tech University, Xiasha College Park, Hangzhou 310018, China.
authors.forename: Aiping
authors.initials: A
authors.lastname: Liu
authors.forename: Huaping
authors.initials: H
authors.lastname: Wu
authors.forename: Xu
authors.initials: X
authors.lastname: Qiu
authors.forename: Weihua
authors.initials: W
authors.lastname: Tang
mesh_terms: D000082:Acetaminophen / Q000032:analysis; D001205:Ascorbic Acid / Q000032:analysis; D002244:Carbon / Q000737:chemistry*; D004563:Electrochemistry / Q000379:methods*; D004566:Electrodes; D005947:Glucose / Q000032:analysis*; D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles; D008855:Microscopy, Electron, Scanning; D009584:Nitrogen / Q000737:chemistry*; D014527:Uric Acid / Q000032:analysis
chemical_list: D014527:Uric Acid; D000082:Acetaminophen; D002244:Carbon; D006046:Gold; D005947:Glucose; D009584:Nitrogen; D001205:Ascorbic Acid