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Highly Sensitive Amperometric Glucose Sensors Based on Nanostructured α‐Ni(OH) 2 Electrodes
Author(s) -
Martins Paulo Roberto,
Aparecida Rocha Michele,
Angnes Lúcio,
Eisi Toma Henrique,
Araki Koiti
Publication year - 2011
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.201100271
Subject(s) - amperometry , detection limit , tin oxide , electrode , materials science , nanoparticle , electrochemistry , electron transfer , analytical chemistry (journal) , biosensor , nanotechnology , chemical engineering , inorganic chemistry , doping , chemistry , optoelectronics , chromatography , engineering
Abstract Stabilized α‐Ni(OH) 2 nanoparticle modified fluorine doped tin oxide (FTO) electrodes were shown to be excellent glucose amperometric FIA sensors exhibiting high specific sensitivity (446 µA mM −1 cm −2 ), low limit of detection (3 µM) and high analytical frequency (128 analyses/hour). The electrodes were constituted by ∼20 nm nanoparticles and the limit of detection was only slightly improved in hydrodynamic as compared to diffusional conditions reflecting the enhanced surface area and the moderate heterogeneous electron transfer rates at the nanostructured α‐Ni(OH) 2 /solution interface.