Empirical Study of Noise Dependence in Electrochemical Sensors
Ghoreishizadeh, Sara S.; Gaurav, Nanda; Carrara, Sandro; De Micheli, Giovanni
2013

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Abstract

We report the experimental study of noise in electrochemical biosensors as related to voltage and concentration. A comparison with experiments is performed for H2O2 and Ferrocyanide with bare sensors and with sensors functionalized with Multi-Walled Carbon Nanotubes (MWCNT) modified electrodes. Chronoamperometry measurements at different voltages were carried out, followed by fast Fourier transform analysis of noise at different concentration of analyte to understand the effect of concentration and voltage on the noise Power Spectral Density (PSD) and the Signal over Noise (SNR) ratio. Experimental results demonstrate the presence of 1/f noise and its dependence on the state variables. The parameters of 1/f noise i.e. the amplitude coefficient and frequency power coefficients are extracted by curve fitting, and are characterized by comparing the coefficient in different molecules, electrodes, voltages and concentration.

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Title Empirical Study of Noise Dependence in Electrochemical Sensors
Author(s) Ghoreishizadeh, Sara S. ; Gaurav, Nanda ; Carrara, Sandro ; De Micheli, Giovanni
Published in Proceedings of the 5th International Workshop on Advances in Sensors and Interfaces (IWASI)
Conference 5th International Workshop on Advances in Sensors and Interfaces (IWASI), Bari, Italy, June 13-14, 2013
Date 2013
ISBN 978-1-4799-0039-8
Keywords
DOI https://doi.org/10.1109/IWASI.2013.6576080
Other identifier(s) View record in Web of Science
Laboratories LSI1
Record Appears in Scientific production and competences > I&C - School of Computer and Communication Sciences > IINFCOM > LSI1 - Integrated Systems Laboratory 1 (STI/IC)
Peer-reviewed publications
Conference Papers
Work produced at EPFL
Published
Record creation date 2013-12-05

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