A Flexible Nafion Coated Enzyme‐free Glucose Sensor Based on Au‐dimpled Ti Structures - Publication - MOST Wiedzy

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A Flexible Nafion Coated Enzyme‐free Glucose Sensor Based on Au‐dimpled Ti Structures

Abstract

The detection of glucose at low concentrations using electrochemical sensors is of great importance due to the possibility of using different human body fluids than blood, such as e.g. urine, saliva, sweat or tears. The interest behind those biofluids is related to their utility in non-invasive sugar determination. In this work, we present flexible, fully biocompatible electrode material based on Au nanoparticles immobilized onto titanium dimples. Au Ti heterostructures were obtained via electrochemical anodization of titanium foil in presence of fluoride anions followed by chemical etching, magnetron sputtering of gold and subsequent thermal dewetting in continuous regime. In the last step of fabrication, electrodes were modified by permselective Nafion membrane. The selection of the best electrode material among different configurations was carried out basing on the electrochemical activity in the contact with 5 mM glucose dissolved in neutral air-saturated 0.1 M PBS. For the 10 nm Au dewetted gold film, limit of detection of 30 μM and high sensitivity of 93 mAcm 2mM 1 were achieved. Application of Nafion membrane caused complete inhibition of the impact of various interference species onto the glucose detection. Good selectivity and repeatability combined with the resistance to prolonged mechanical stress suggest that prepared material can be used in noninvasive glucose sensig

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Details

Category:
Articles
Type:
artykuły w czasopismach
Published in:
ELECTROANALYSIS no. 32, pages 323 - 332,
ISSN: 1040-0397
Language:
English
Publication year:
2020
Bibliographic description:
Olejnik A., Siuzdak K., Karczewski J., Grochowska K.: A Flexible Nafion Coated Enzyme‐free Glucose Sensor Based on Au‐dimpled Ti Structures// ELECTROANALYSIS -Vol. 32,iss. 2 (2020), s.323-332
DOI:
Digital Object Identifier (open in new tab) 10.1002/elan.201900455
Verified by:
Gdańsk University of Technology

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