2008 NSTI Nanotechnology Conference and Trade Show - Nanotech 2008 - 11th Annual

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TechConnect Summit
Clean Technology 2008

Novel FET Sensing Devices Based on SuMBE Grown Organic Molecular Films.

S. Iannotta, T. Toccoli, M. Tonezzer, A. Pallaoro, C. Corradi, M. Mazzola
Institute For Photnics and Nanotechnology IFN-CNR, IT

OFET, SuMBE growth, sensing, structure

We proposed Supersonic Molecular Beam Deposition (SuMBE) as a method to control structure and morhpology of molecular films at different lenght scales and we have shown that is uniquely suitable to approach such questions achieving unprecedented control. This method, based on the realization of supersonic beams of the organics seeded in lighter carrier gasses permit to overcome some thermodynamic limitation opening the access to new perspectives to realize structures controlled at the different length scales. Y. Wu et al. (PRL 98 (2007) 076601) have shown the key role played by the kinetic energy of the impinging molecules controlling and determining, right from the early stages. This is n approach that allows the design of electronic devices with improved and controlled electronic properties (T. Toccoli et al., APL 88 (2006) 132106). Here we report on solid state gas and electrochemical sensors based on OFET deposited by SuMBE. We fabricated several different devices for gas-sensing and for exploring applications to bio-sensing and in microfluidic environment. The devices, based on different acenes and oligothiophenes and on (bio)-functionalized molecules, show very promising properties in terms of sensitivity, stability and we envisage the potential of such devices in applications where the active FET configuration gives new strategic opportunities.

Nanotech 2008 Conference Program Abstract