Abstract Submitted to the    NANOTUBE'06 Conference:

Transparent and flexible Carbon Nanotube/Polyaniline pH Sensor

Martti Kaempgen, Siegmar Roth

Max-Planck-Institute for Solid State Research

M.Kaempgen@fkf.mpg.de

VII. Chemical Modification of Nanotubes

Thin film carbon nanotube networks are used as a conductive, transparent and flexible backbone structure for electrochemically deposited polyaniline. Such a device is sensitive to pH allowing the potentiometric determination of pH values ranging from pH 1-13. The excellent performance in terms of linearity, selectivity, stability and fast response makes this device suitable for pH sensor applications. In addition, the extremely simple preparation technique allows the conversion of any user defined substrate into a pH sensor. Since this technique is not limited to polyaniline only, the deposition of various polymers on carbon nanotubes in general offers a great potential for demanding sensor applications.

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