RT journal article
T1 Simple and cost-effective pH and T sensors from top to bottom: New chemical probes based on sonogel-carbon transducers for plasma analyses
A1 García Guzmán, Juan José
A1 Sainz Calvo, Álvaro Jesús
A1 Sierra Padilla, Alfonso
A1 Bellido Milla, Dolores
A1 Cubillana Aguilera, Laura
A1 Palacios Santander, José María
A2 Química Analítica
K1 Multiwalled carbon nanotubes
K1 pH
K1 Polyaniline
K1 Sinusoidal voltages
K1 Sonogel-carbon electrodes
K1 Temperature
AB The present work introduces two novel approaches to fabricate simple and cost-effective pH and temperature probes. Sinusoidal voltage methodologies were employed to electrodeposit polyaniline (PANI) at different growth times (10–20 min) on the surface of an affordable Sonogel-Carbon electrode to conform a robust pH sensor. The presence of PANI and its phases were corroborated by electrochemical means. The sensibility, reversibility and selectivity of the produced sensor were very adequate to apply it in physiological samples. In this regard, the proposed sensor was evaluated in artificial blood serum as well as untreated plasma samples obtaining outstanding results in comparison with a gold reference technique (error <2 %). In addition, a new composite sonogel material, intrinsically modified with multiwalled carbon nanotubes, was attached on top of an electrode couple to one-step fabricate a new temperature probe, relating resistance of the probe with the surroundings temperature. In this case, an optical microscopy characterization was performed to study the sturdiness of the layer. Remarkably, suitable results in terms of sensitivity and selectivity were obtained. The probes were assessed in artificial and untreated plasma samples as well, with the corresponding validation step (error <1 %) by using a commercial temperature probe.
PB Elsevier
SN 0039-9140
YR 2024
FD 2024
LK http://hdl.handle.net/10498/32802
UL http://hdl.handle.net/10498/32802
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 12-nov-2026