Simple modifications on Sonogel-Carbon electrodes to obtain a new pH and T sensors. Target: reducing costs not value

Juan García-Guzmán; Álvaro Sainz-Calvo; Ana Pérez-Fernández; Alfonso Sierra-Padilla; Dolores Bellido-Milla; Laura Cubillana-Aguilera; José María Palacios-Santander

doi:10.3390/CSAC2023-14891

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Simple modifications on Sonogel-Carbon electrodes to obtain a new pH and T sensors. Target: reducing costs not value

Juan García-Guzmán

¹,

Álvaro Jesús Sainz-Calvo

²,

Ana Pérez-Fernández

²,

Alfonso Sierra-Padilla

¹,

Dolores Bellido-Milla

¹,

Laura Cubillana-Aguilera

^{*

1},

José María Palacios-Santander

¹ Institute of Research on Electron Microscopy and Materials (IMEYMAT), Department of Analytical Chemistry, Faculty of Sciences, Campus de Excelencia Internacional del Mar (CEIMAR), University of Cadiz, Campus Universitario de Puerto Real, Polígono del Río
² Institute of Research on Electron Microscopy and Materials (IMEYMAT), Department of Analytical Chemistry, Faculty of Sciences, Campus de Excelencia Internacional del Mar (CEIMAR), University of Cadiz, Campus Universitario de Puerto Real, Polígono del Río

Academic Editor: Jose Vicente Ros-Lis

Published: 27 October 2023 by MDPI in The 2nd International Electronic Conference on Chemical Sensors and Analytical Chemistry session Applied Chemical Sensors

https://doi.org/10.3390/CSAC2023-14891

Abstract:

In this work two new different sensors are developed: a pH sensor and a temperature probe. The former is based on a polyaniline (PANI) layer electrodeposited employing sinusoidal voltages and optimizing the deposition time (10-20 min). On the other hand, the temperature probe was designed taking advantage of the carbon nanotubes temperature properties. Both sensors were built on Sonogel-Carbon electrodes seeking cost effective devices. In both scenarios, results were satisfactory, the repeatability and reproducibility with values below 5%. Additionally, an excellent selectivity of the pH sensor was evaluated with the challenging interstitial matrix, prospecting an adequate future employment in real clinical samples.

Keywords: Sonogel-Carbon electrodes, pH, temperature, polyaniline, sinusoidal voltages, multiwalled carbon nanotubes, cost effective sensor.

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