Studies on Calcium Ion Selectivity of ZnO Nanowire Sensors Using Ionophore Membrane Coatings
2008 (English)In: Research Letters in Nanotechnology, ISSN 1687-6849, Vol. 2008, no Article ID 701813Article in journal (Refereed) Published
Zinc oxide nanorods with 100nm diameter and 900nm length were grown on the surface of a silver wire (0.25mm in diameter)
with the aim to produce electrochemical nanosensors. It is shown that the ZnO nanorods exhibit a Ca2+-dependent electrochemical
potentiometric behavior in an aqueous solution. The potential difference was found to be linear over a large logarithmic
concentration range (1 μM to 0.1 M) using Ag/AgCl as a reference electrode and the response time was less than one minute.
In order to adapt the sensors for calcium ion measurements in biological fluids with sufficient selectivity and stability, plastic
membrane coatings containing ionophores were applied. These functionalized ZnO nanorods sensors showed a high sensitivity
(26.55 mV/decade) and good stability.
Place, publisher, year, edition, pages
Hindawi Publishing Corporation , 2008. Vol. 2008, no Article ID 701813
National CategoryNatural Sciences
IdentifiersURN: urn:nbn:se:liu:diva-19514DOI: 10.1155/2008/701813OAI: oai:DiVA.org:liu-19514DiVA: diva2:225277