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Nanowire-templated microelectrodes for high-sensitivity pH detection.

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Antohe, Vlad [UCL] Radu, Adrian [University of Bucharest] Mátéfi-Tempfli, Mária [UCL] Attout, Anne [UCL] Yunus, Sami [UCL] Bertrand, Patrick [UCL] Dutu, Constantin Augustin [UCL] Vlad, Alexandru [UCL] Melinte, Sorin [UCL] Mátéfi-Tempfli, Stefan [UCL] Piraux, Luc [UCL]

A highly sensitive pH capacitive sensor has been designed by confined growth of vertically aligned nanowire arrays on interdigited microelectrodes. The active surface of the device has been functionalized with an electrochemical pH transducer (polyaniline). We easily tune the device features by combining lithographic techniques with electrochemical synthesis. The reported electrical LC resonance measurements show considerable sensitivity enhancement compared to conventional capacitive pH sensors realized with microfabricated interdigited electrodes. The sensitivity can be easily improved by changing only the thickness of the functional layer.

Document type Article de périodique (Journal article) – Article de recherche
Access type Accès restreint
Publication date 2009
Language Anglais
Journal information "Applied Physics Letters" - Vol. 94, no. 7, p. 073118(3) (2009)
Peer reviewed yes
Publisher American Institute of Physics (Melville)
issn 0003-6951
Publication status Publié
Affiliations UCL - FSA/MAPR - Département des sciences des matériaux et des procédés
UCL - FSA/ELEC - Département d'électricité
Keywords electrochemical sensors ; microelectrodes ; nanowires ; photolithography ; polymers ; transducers
Links
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Bibliographic reference Antohe, Vlad ; Radu, Adrian ; Mátéfi-Tempfli, Mária ; Attout, Anne ; Yunus, Sami ; et. al. Nanowire-templated microelectrodes for high-sensitivity pH detection.. In: Applied Physics Letters, Vol. 94, no. 7, p. 073118(3) (2009)
Permanent URL http://hdl.handle.net/2078.1/35781