Ion-channel sensors based on ETH 1001 ionophore embedded in charged-alkanethiol self-assembled monolayers on gold electrode surfaces
Articolo
Data di Pubblicazione:
2006
Citazione:
Ion-channel sensors based on ETH 1001 ionophore embedded in charged-alkanethiol self-assembled monolayers on gold electrode surfaces / H. Aoki, Y. Umezawa, A. Vertova, S. Rondinini. - In: ANALYTICAL SCIENCES. - ISSN 0910-6340. - 22:12(2006), pp. 1581-1584.
Abstract:
An ion-channel sensor was demonstrated by immobilizing ETH 1001, an ionophore for ion-selective electrodes, on a gold electrode surface. The approach for preparing the sensor was to incorporate the ionophore into a mixed self-assembled monolayer of 10-mercaptodecanesulfonate and 11-hydroxy-1-undecanethiol formed on the surface. The voltammetric responses for the thus prepared sensor to the primary cation Ca2+ were observed by using [Fe(CN)(6)](3-/4-) as an electroactive marker. The ionophore was stably immobilized on the electrode surface with the hydrophobic interaction between its alkyl chains and those of the alkanethiol. The introduction of a proper charge density to the electrode surface improved the sensor sensitivity with retaining the selective response to Ca2+ against Mg2+ with concentrations above 10(-4) M.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
Potentiometric selectivity coefficients; iupac technical report; bond-forming receptor; voltammetric detection; artificial receptors; acid; oligonucleotide; mismatch; design; anions
Elenco autori:
H. Aoki, Y. Umezawa, A. Vertova, S. Rondinini
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