RT info:eu-repo/semantics/article
T1 Tuning the electrochemical response of PCL-PEDOT:PSS fibers-based sensors by gas dissolution foaming
A1 Barroso Solares, Suset
A1 Pinto Sanz, Javier
A1 Salvo Comino, Coral
A1 Cuadra Rodríguez, Daniel
A1 García Cabezón, Ana Cristina
A1 Rodríguez Pérez, Miguel Ángel
A1 Rodríguez Méndez, María Luz
K1 Polimeros y polimerización
K1 Electrochemistry
K1 Electrospinning
K1 Hollow fibers
K1 CO2 foaming
K1 Electrohilado
K1 Fibras huecas
K1 Espuma de CO2
K1 2210.05 Electroquímica
AB A new procedure to enhance the performance of polymer-based electrochemical sensors is proposed in this work. Polycaprolactone (PCL) electrospun fiber mats with tunable fiber morphology are functionalized with a conductive polymer (PEDOT:PSS) by a facile dip-coting process, providing them the necessary electrical conductivity to work as sensors. The modification of the fiber morphology is achieved by an enhanced gas dissolution foaming procedure, an environmentally friendly procedure that employs CO2 as blowing agent and takes advantage of recent advances that allowed extending such procedure to polymeric microfibers. Thus, the enhanced gas dissolution foaming approach was employed both before and after the coating of the fiber mats with PEDOT:PSS, producing in both cases hollow fibers with enhanced surface porosity and area, as well as increased diameter regarding the initial solid PCL fibers. The addition of PEDOT:PSS, both in solid and foamed PCL fibers, allows their use as sensors, as proved by cyclic voltammetry in a KCl solution, as well as calibrated with catechol solutions. Remarkable influence of the foaming procedure on the performance of the sensors have been found, proving by a detailed characterization that the foaming procedure applied after the PEDOT:PSS coating provides an enhanced sensoring response (i.e., increased signal, optimal linearity, decreased LOD) due to their superior surface area and optimal PEDOT:PSS distribution along the fiber mats, not only covering the external surface of the fibers but infusing into the inner regions.
PB Elsevier
SN 0169-4332
YR 2023
FD 2023
LK https://uvadoc.uva.es/handle/10324/60430
UL https://uvadoc.uva.es/handle/10324/60430
LA eng
NO Applied Surface Science, 2023, vol. 638, 158062
NO Producción Científica
DS UVaDOC
RD 24-dic-2024