Gold nanoparticles solid contact for ion-selective electrodes of highly stable potential readings

Internal solution free ion-selective electrodes were prepared applying for the first time gold nanoparticles as a solid contact layer. The presence of a layer of gold nanoparticles stabilized with aliphatic thiols at the back side of the membrane resulted in highly stable potentiometric responses of...

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Published inTalanta (Oxford) Vol. 85; no. 4; pp. 1986 - 1989
Main Authors Jaworska, Ewa, Wójcik, Michał, Kisiel, Anna, Mieczkowski, Józef, Michalska, Agata
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 30.09.2011
Elsevier
Subjects
Aliphatic compounds
All-solid-state potentiometric sensors
Analytical chemistry
Chemistry
Contact
Electrochemical methods
Electrodes
Exact sciences and technology
General, instrumentation
Gold
Gold-nanoparticles
Nanoparticles
Potentiometry
Selectivity
Sensors
Slopes
Stability
All-solid-state potentiometric sensors
Selectivity
Stability
Potentiometry
Gold-nanoparticles
Gold
Thiol
Electrochemical method
Nanoparticle
Time
Chemical sensor
Ion selective electrode
Membrane
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Summary:Internal solution free ion-selective electrodes were prepared applying for the first time gold nanoparticles as a solid contact layer. The presence of a layer of gold nanoparticles stabilized with aliphatic thiols at the back side of the membrane resulted in highly stable potentiometric responses of the sensors, good selectivities and close to Nernstian slopes. Electrochemical studies have confirmed that the applied material is effectively working as capacitive solid contact, yielding high stability sensors.
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ISSN:0039-9140
1873-3573
DOI:10.1016/j.talanta.2011.07.049