publication . Article . 2021

General Model and Equivalent Circuit for the Chemical Noise Spectrum Associated to Surface Charge Fluctuation in Potentiometric Sensors

Leandro Julian Mele; Pierpaolo Palestri; Luca Selmi;
Open Access English
  • Published: 01 Mar 2021 Journal: IEEE Sensors Journal, volume 21, issue 5, pages 6,258-6,269 (issn: 1530-437X, eissn: 1558-1748 2379-9153, Copyright policy)
Abstract
This paper firstly reports a general and powerful approach to evaluate the power spectral density (PSD) of the surface charge fluctuations, so-called ``chemical noise'', from a generic set of reactions at the sensing surface of potentiometric sensors such as, for instance, Ion-Sensitive Field Effect Transistors (ISFETs). Starting from the master equation, the spectral noise signature of a reaction set is derived as a function of the reaction kinetic parameters and of the interface concentration of the ionic species. Secondly, we derive an equivalent surface admittance, whose thermal noise PSD produces a noise PSD equal to that of the surface charge fluctuations....
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Subjects
free text keywords: chemical noise, Surface binding reactions, potentiometric sensors, ISFET, cross-sensitivity, Instrumentation, Electrical and Electronic Engineering, Equivalent circuit, Chemical noise, Atomic physics, Surface charge, Potentiometric titration, Materials science
Funded by
EC| IN-FET
Project
IN-FET
Ionic Neuromodulation For Epilepsy Treatment
  • Funder: European Commission (EC)
  • Project Code: 862882
  • Funding stream: H2020 | RIA
Validated by funder
Communities
FET H2020FET OPEN: FET-Open Challenging Current Thinking
FET H2020FET OPEN: Ionic Neuromodulation For Epilepsy Treatment
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