Abstract
A fluorine-doped tin oxide coated glass substrate was modified with a gold nanoparticle-anchored conducting poly(aniline blue) nanocomposite (AuNP/PAB/FTO) as an efficient sensor for non-enzymatic detection of glucose. The PAB was deposited onto the Fro electrode by the cyclic voltammetric sweeping method, with high surface coverage. Subsequently, AuNPs were deposited onto the PAB/FID electrode with good crystallinity and purity by the seed-assisted growth method. The as-prepared nanocomposite exhibited excellent electrocatalytic activity for the oxidation of glucose, with two linear responses in concentration ranges from 2 to 50 mu m and 50-250 gM with sensitivities of ca. 130 and 0.12 mu A.cm(-2).mu M-1, respectively. The limit of detection of this sensor was 0.40 mu M. The sensor exhibits high reproducibility, long-term stability, repeatability, low interference, and good recovery of glucose in real samples. These results indicate that the present nanocomposite has great potential for electrochemical bio-sensing applications. (C) 2019 Elsevier B.V. All rights reserved.