Potentiometric Ion-Selective Sensors based on UV-Ozone Irradiated Laser-Induced Graphene Electrode

Sudipta Choudhury; Soumyendu Roy; Gourav Bhattacharya; Sam Fishlock; Sujit Deshmukh; Sangita Bhowmick; James McLaughlin; Susanta Sinha Roy

doi:10.1016/j.electacta.2021.138341

Potentiometric Ion-Selective Sensors based on UV-Ozone Irradiated Laser-Induced Graphene Electrode

Sudipta Choudhury, Soumyendu Roy, Gourav Bhattacharya, Sam Fishlock, Sujit Deshmukh, Sangita Bhowmick, James McLaughlin, Susanta Sinha Roy

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Abstract

Disposable devices for sensing biomarkers like Na+ ion in sweat was developed using UV-Ozone irradiated laser-induced graphene (LIG) based electrodes. Solid-state ion-selective electrodes (ISEs) sensitive to Na+ ions were fabricated by a two-step drop-coating process of polyvinyl chloride solution containing plasticizer, ionophore and ion-exchanger on LIG electrode. Hydrophobic to hydrophilic transition induced by UV-Ozone treatment reduced the contact angle, resulting in better permeation of the ion-selective membrane into the ozonized LIG film. Raman spectroscopy and IR absorption studies indicate physisorption of ozone on LIG. Performance of ozonized LIG (O-LIG) electrodes was much better than pristine LIG and screen-printed carbon electrodes. Sensitivity of 60.2 ± 0.9 mV/ decade to Na+ ions and a lower limit of detection of 1 × 10−6 M was achieved using O-LIG based ISEs. Response time of the devices were around 1 min.

Original language	English
Article number	138341
Journal	Electrochimica Acta
Volume	387
Early online date	1 May 2021
DOIs	https://doi.org/10.1016/j.electacta.2021.138341
Publication status	Published (in print/issue) - 10 Aug 2021

Bibliographical note

Publisher Copyright:
© 2021 Elsevier Ltd

Keywords

Electrochemical analysis
Ion-selective membrane
Laser-induced graphene
Sweat sensor
Wearable electrode

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.electacta.2021.138341

1-s2.0-S0013468621006319-mainAuthor Accepted Manuscript, 1.84 MBLicence: CC BY-NC-ND

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title = "Potentiometric Ion-Selective Sensors based on UV-Ozone Irradiated Laser-Induced Graphene Electrode",

abstract = "Disposable devices for sensing biomarkers like Na+ ion in sweat was developed using UV-Ozone irradiated laser-induced graphene (LIG) based electrodes. Solid-state ion-selective electrodes (ISEs) sensitive to Na+ ions were fabricated by a two-step drop-coating process of polyvinyl chloride solution containing plasticizer, ionophore and ion-exchanger on LIG electrode. Hydrophobic to hydrophilic transition induced by UV-Ozone treatment reduced the contact angle, resulting in better permeation of the ion-selective membrane into the ozonized LIG film. Raman spectroscopy and IR absorption studies indicate physisorption of ozone on LIG. Performance of ozonized LIG (O-LIG) electrodes was much better than pristine LIG and screen-printed carbon electrodes. Sensitivity of 60.2 ± 0.9 mV/ decade to Na+ ions and a lower limit of detection of 1 × 10−6 M was achieved using O-LIG based ISEs. Response time of the devices were around 1 min.",

keywords = "Electrochemical analysis, Ion-selective membrane, Laser-induced graphene, Sweat sensor, Wearable electrode",

author = "Sudipta Choudhury and Soumyendu Roy and Gourav Bhattacharya and Sam Fishlock and Sujit Deshmukh and Sangita Bhowmick and James McLaughlin and Roy, {Susanta Sinha}",

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doi = "10.1016/j.electacta.2021.138341",

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AU - Choudhury, Sudipta

AU - Roy, Soumyendu

AU - Bhattacharya, Gourav

AU - Fishlock, Sam

AU - Deshmukh, Sujit

AU - Bhowmick, Sangita

AU - McLaughlin, James

AU - Roy, Susanta Sinha

PY - 2021/8/10

Y1 - 2021/8/10

N2 - Disposable devices for sensing biomarkers like Na+ ion in sweat was developed using UV-Ozone irradiated laser-induced graphene (LIG) based electrodes. Solid-state ion-selective electrodes (ISEs) sensitive to Na+ ions were fabricated by a two-step drop-coating process of polyvinyl chloride solution containing plasticizer, ionophore and ion-exchanger on LIG electrode. Hydrophobic to hydrophilic transition induced by UV-Ozone treatment reduced the contact angle, resulting in better permeation of the ion-selective membrane into the ozonized LIG film. Raman spectroscopy and IR absorption studies indicate physisorption of ozone on LIG. Performance of ozonized LIG (O-LIG) electrodes was much better than pristine LIG and screen-printed carbon electrodes. Sensitivity of 60.2 ± 0.9 mV/ decade to Na+ ions and a lower limit of detection of 1 × 10−6 M was achieved using O-LIG based ISEs. Response time of the devices were around 1 min.

AB - Disposable devices for sensing biomarkers like Na+ ion in sweat was developed using UV-Ozone irradiated laser-induced graphene (LIG) based electrodes. Solid-state ion-selective electrodes (ISEs) sensitive to Na+ ions were fabricated by a two-step drop-coating process of polyvinyl chloride solution containing plasticizer, ionophore and ion-exchanger on LIG electrode. Hydrophobic to hydrophilic transition induced by UV-Ozone treatment reduced the contact angle, resulting in better permeation of the ion-selective membrane into the ozonized LIG film. Raman spectroscopy and IR absorption studies indicate physisorption of ozone on LIG. Performance of ozonized LIG (O-LIG) electrodes was much better than pristine LIG and screen-printed carbon electrodes. Sensitivity of 60.2 ± 0.9 mV/ decade to Na+ ions and a lower limit of detection of 1 × 10−6 M was achieved using O-LIG based ISEs. Response time of the devices were around 1 min.

KW - Electrochemical analysis

KW - Ion-selective membrane

KW - Laser-induced graphene

KW - Sweat sensor

KW - Wearable electrode

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DO - 10.1016/j.electacta.2021.138341

M3 - Article

SN - 0013-4686

VL - 387

JO - Electrochimica Acta

JF - Electrochimica Acta

M1 - 138341

ER -

Potentiometric Ion-Selective Sensors based on UV-Ozone Irradiated Laser-Induced Graphene Electrode

Abstract

Bibliographical note

Keywords

UN SDGs

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