2024-03-29T12:55:41Zhttps://uvadoc.uva.es/oai/requestoai:uvadoc.uva.es:10324/211032021-06-23T11:52:07Zcom_10324_1186com_10324_931com_10324_894col_10324_1404
00925njm 22002777a 4500
dc
Medina Plaza, Cristina
author
Furini, Leonardo Negri
author
Constantino, Carlos José Leopoldo
author
Saja Sáez, José Antonio de
author
Rodríguez Méndez, María Luz
author
2014
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.
Analytica Chimica Acta, Diciembre 2014, vol. 851, n. C, p. 95-102
00032670
http://uvadoc.uva.es/handle/10324/21103
10.1016/j.aca.2014.08.049
95
102
Synergistic electrocatalytic effect of nanostructured mixed films formed by functionalised gold nanoparticles and bisphthalocyanines
851
Bisphthalocyanine
Gold nanoparticle
Hydroquinone
Langmuir-Blodgett
Sensor
Synergistic electrocatalytic effect of nanostructured mixed films formed by functionalised gold nanoparticles and bisphthalocyanines