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Controllable anchoring of gold nanoparticles to polypyrrole nanofibers by hydrogen bonding and their application in nonenzymatic glucose sensors

By Li CL, Su Y, Lv XY, Xia HL, Shi HJ, Yang XG, Zhang JQ and Wang YJ

Abstract

An enzymeless glucose biosensor based on polypyrrole nanofibers-supporting Au nanoparticles (Au/PPyNFs) was investigated in this study. The Au/PPyNFs heterogeneous composite materials were synthesized in-situ via hydrogen bonding interactions for the assembly of polyethyleneimine (PEI) on the surface of polypyrrole nanofibers (PPyNFs). By changing the molar ratio of PPy to HAuCl4, Au/PPyNFs with different Au loadings were obtained. The morphology and composition of Au/PPyNFs were characterized using SEM, TEM, FTIR, XRD and XPS, respectively. The hybrids exhibited a high electrocatalytic activity toward glucose oxidation, which is prerequisite for the catalysts to be applied in amperometric glucose sensors. By using the nonenzymatic glucose sensor based on Au/PPyNFs, 0.2-13 mM glucose can be detected with a sensitivity of 1.003 mu A cm(-2) mM(-1) and a good linearity (R-2=0.9993) between current density and glucose concentration. The proposed glucose sensor provides a promising strategy to construct fast, sensitive, and anti-interfering amperometric sensors for early diagnosis and prevention of diabetes. (C) 2012 Elsevier B.V. All rights reserved

Topics: ELECTROCATALYTIC OXIDATION, CARBON NANOTUBES, COMPLEXES, FABRICATION, ELECTRODES, ARRAYS, ACID, Carbon, Complexes, FABRICATION, Electrodes, arrays, acid, C, carbon nanotubes, diamond-like carbon, DLC, discotic liquid crystals, discophases, nanotube devices, C (envelope sizes), C (US paper size), Cytosine, carbon nano-sized tubes, carbon nano tubes, carbon nanoscale tubes, carbon nanotubules, Linear complexes, DEFORMATION PROCESSES, FABRICABILITY, FABRICATION (FRANCAIS), TRAVAIL DES METAUX, VERARBEITUNG, ELECTRODES (FRANCAIS), ELEKTRODEN, superconducting arrays, 酸
Year: 2012
DOI identifier: 10.1016/j.bios.2012.04.049
OAI identifier: oai:ir.ciac.jl.cn:322003/47926
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