RT info:eu-repo/semantics/article
T1 Effect of nanoclays on the electrochemical performance of LbL catechol sensors
A1 García Hernández, Celia
A1 García Cabezón, Ana Cristina
A1 Rodríguez Méndez, María Luz
A1 Martín Pedrosa, Fernando
K1 Electrochemistry
K1 Química analítica
K1 Halloysite nanotubes
K1 Copper phthalocyanine
K1 Polyethylenimine
K1 Nanotubos de halloysita
K1 Ftalocianina de cobre
K1 Polietilenimina
K1 23 Química
AB Halloysite nanotubes (HNTs) are excellent candidates to improve the immobilization of electroactive materials or enzymes due to their tubular structure and properties. In this work, an improved LbL based catechol sensor has been developed using a combination of sensing materials with complementary activity. These include sulfonated copper phthalocyanine (CuPcSO3−) acting as electrocatalytic material, poly(ethyleneimine) (PEI) to increase the charge injection efficiency and the increase of the surface provided by HNTs. The LbL film has been used as the sensing platform to deposit tyrosinase in order to further enhance the performance of the developed sensor towards catechol. The LbL films were characterized by using UV–Vis, FTIR and cyclic voltammetry. The limits of detection, repeatability and reproducibility of the sensors and the biosensor were evaluated. The limits of detection were 1.23 μmol·L−1 for the optimized (PEI/CuPcSO3−) sensor, 0.987 μmol·L−1 for the (PEI/HNT/PEI/CuPcSO3−) sensor and 0.938 μmol·L−1 for the (PEI/HNT/PEI/CuPcSO3−)-Tyrosinase sensor.
PB Elsevier
SN 0013-4686
YR 2024
FD 2024
LK https://uvadoc.uva.es/handle/10324/65966
UL https://uvadoc.uva.es/handle/10324/65966
LA eng
NO Electrochimica Acta Volume, 2024, vol. 476, 143717
NO Producción Científica
DS UVaDOC
RD 27-jul-2024