A robust enzymeless glucose sensor based on tin nickel sulfide nanocomposite modified electrodes

• Published in: Applied physics. A, Materials science & processing Materials science & processing, 2021, Vol.127 (1), Article 20
• Main Authors: Chandrasekaran, Nivedhini Iswarya, Harshiny, M., Thangasamy, Pitchai, Matheswaran, Manickam
• Format: Article
• Language: English
• Subjects: Applied physics; Biosensors; Characterization and Evaluation of Materials; Condensed Matter Physics; Electrodes; Glucose; Machines; Manufacturing; Materials science; Metal foams; Nanocomposites; Nanotechnology; Nickel; Nickel sulfide; Optical and Electronic Materials; Oxidation; Physics; Physics and Astronomy; Processes; Response time; Selectivity; Signal to noise ratio; Surfaces and Interfaces; Thin Films
• ISSN: 0947-8396; 1432-0630
• DOI: 10.1007/s00339-020-04163-4

Tin-nickel sulfide nanocomposite deposited on nickel foam (TNS/NF) displays high electrocatalytic activity toward glucose oxidation. As an enzymeless glucose sensor, the TNS/NF sensing electrode shows a linear range of response from 3 to 5 mM, with a low detection limit of 0.18 μM signal-to-noise ratio of 3 and high sensitivity of 1622.9 μA mM −1  cm −2 . In addition, the proposed sensing electrode shows a fast response time of less than 2 s on glucose addition. The resulting biosensor has high selectivity, excellent reproducibility, and long-term stability for glucose detection. It should be a worthy note; the TNS/NF could be successfully applied in determining glucose in a real blood sample at an applied voltage of 0.5 V. Graphic abstract