Simple Modifications of Sonogel-Carbon Electrodes to Obtain New pH and T Sensors—Target: Reducing Costs, Not Value

Abstract

In this work two new different sensors are developed: a pH sensor and a temperature probe. The former is based on an electrodeposited polyaniline (PANI) layer employing sinusoidal voltages and optimizing the deposition time (10–20 min). On the other hand, the temperature probe was designed by taking advantage of the carbon nanotubes’ temperature properties. Both sensors were built on sonogel-carbon electrodes, seeking cost effective devices. In both scenarios, the results were satisfactory; the repeatability and reproducibility had values below 5%. Additionally, an excellent pH sensor selectivity 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