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Transport Phenomena in Nanomaterials

M. Adami, M.K. Ram, P. Faraci, and C. Nicolini*

Polo Nazionale Bioelettronica, Marciana, (LI), Italy
El.B.A. Foundation, Rome (Italy) and
Institute of Biophysics, University of Genoa (Italy)

This is an abstract for a poster to be presented at the
Fifth Foresight Conference on Molecular Nanotechnology.
The full paper is available here.

 

The AC and DC conduction properties of Langmuir-Blodgett films of fatty acids salts, deposited onto pre-treated substrates, have been studied. Aluminum/LB film/Aluminum sandwich structures have been constructed; the sample preparation procedure has been optimized to minimize problems related to short circuits between upper and lower electrodes by means of chemical and physical treatments of the substrate surfaces. The results show that the measured characteristics are related to the properties of the films and are in good agreement with theoretical predictions. Experimental data have been compared also with a theoretical model, showing a good interpretation of the conduction mechanism. Starting from these results, the behaviour of more attractive materials has been investigated: conductive polymers (such as polypirroles and polyanilines) and metalloproteins (such as redox enzymes and cytochrome P450) have been studied in order to highlight their capabilities to develop hybrid structures and devices. In addition to the Langmuir-Blodgett technique, the layer-by-layer surface modification was utilized for building up multilayer structures. The multilayer formation was controlled by UV-Visible and QCM techniques. Different types of structures and their transport mechanism were proposed, towards the development of nanomaterials and nanodevices.


*Corresponding Address:
Claudio Nicolini, Fondazione EL.B.A., Via Medaglie d'Oro 305 - 00136 Rome, Italy, ph: +39 6 35410728, fax: +39 6 35451637, email: info@fondazione-elba.org



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