RT info:eu-repo/semantics/article
T1 Synergistic electrocatalytic effect of nanostructured mixed films formed by functionalised gold nanoparticles and bisphthalocyanines
A1 Medina Plaza, Cristina
A1 Furini, Leonardo Negri
A1 Constantino, Carlos José Leopoldo
A1 Saja Sáez, José Antonio de
A1 Rodríguez Méndez, María Luz
K1 Bisphthalocyanine
K1 Gold nanoparticle
K1 Hydroquinone
K1 Langmuir-Blodgett
K1 Sensor
AB A synergistic electrocatalytic effect was observed in sensors where two electrocatalytic materials (functionalized gold nanoparticles and lutetium bisphthalocyanine) were co-deposited using the Langmuir-Blodgett technique. Films were prepared using a novel method where water soluble functionalised gold nanoparticles [(11-mercaptoundecyl)tetra(ethylene glycol)] (SAuNPs) were inserted in floating films of lutetium bisphthalocyanine (LuPc2) and dimethyldioctadecylammonium bromide (DODAB) as the amphiphilic matrix. The formation of stable and homogeneous mixed films was confirmed by π-A isotherms, BAM, UV-vis and Raman spectroscopy, as well as by SEM and TEM microscopy. The synergistic effect towards hydroquinone of the electrodes modified with LuPc2:DODAB/SAuNP was characterised by an increase in the intensity of the redox peaks and a reduction of the overpotential. This synergistic electrocatalytic effect arose from the interaction between the SAuNPs and the phthalocyanines that occur in the Langmuir-Blodgett films and from the high surface area provided by the nanostructured films. The sensitivity increased with the amount of LuPc2 and SAuNPs inserted in the films and limits of detection in the range of 10-7molL-1 were attained.
PB Elsevier
SN 00032670
YR 2014
FD 2014
LK http://uvadoc.uva.es/handle/10324/21103
UL http://uvadoc.uva.es/handle/10324/21103
LA eng
NO Analytica Chimica Acta, Diciembre 2014, vol. 851, n. C, p. 95-102
NO Producción Científica
DS UVaDOC
RD 19-abr-2024