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  4. Bismuth-Nanocomposites Modified SPCEs for Non-Enzymatic Electrochemical Sensors
 
research article

Bismuth-Nanocomposites Modified SPCEs for Non-Enzymatic Electrochemical Sensors

Madagalam, Mallikarjun
•
Bartoli, Mattia
•
Tagliaferro, Alberto
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May 1, 2021
Ieee Sensors Journal

We present newly developed electrochemical sensors based on screen-printed carbon electrodes functionalized with HO-BiONO3, polyethylene glycol coated HO-BiONO3, and Bi-5 O-7 NO3. The performance of these sensors has been studied by cyclic voltammetry experiments and compared in terms of the kinetic rate constant, the sensitivity, and the limit of detection. The polyethylene glycol coated HO-BiONO3 sensor was found with higher oxidation peak current, lower oxidation peak potential, and assured a faster paracetamol reaction due to a higher kinetic rate constant of 42.0 +/- 9.8 ms(-1). This sensor also possessed lesser peakto-peak separation (Delta E-p) of 243 +/- 10mV with a higher chance of reversible reaction compared to other developed sensors. The polyethylene glycol coated HO-BiONO3 sensor also registered a sensitivity of 43.50 +/- 0.54 mu A/mM with a relative standard deviation of 1.24 %, which is more than double compared to the bare screen-printed electrode with a limit of detection of 2.24 +/- 0.03 mu M (R-2 = 0.998, n = 3). HO-BiONO3 and Bi-5 O-7 NO3 sensors also performed much better with slightly higher kinetic rate constant and higher sensitivity than the bare screen-printed electrode sensor.

  • Details
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Type
research article
DOI
10.1109/JSEN.2021.3059278
Web of Science ID

WOS:000638432800090

Author(s)
Madagalam, Mallikarjun
Bartoli, Mattia
Tagliaferro, Alberto
Carrara, Sandro  
Date Issued

2021-05-01

Publisher

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

Published in
Ieee Sensors Journal
Volume

21

Issue

9

Start page

11155

End page

11162

Subjects

Engineering, Electrical & Electronic

•

Instruments & Instrumentation

•

Physics, Applied

•

Engineering

•

Physics

•

sensors

•

electrodes

•

bismuth

•

carbon

•

biosensors

•

sensitivity

•

temperature sensors

•

bismuth-nanocomposites

•

electrochemical sensors

•

kinetic rate constant

•

limit of detection

•

nanoparticles

•

screen printed electrodes

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
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Available on Infoscience
May 22, 2021
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/178241
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