Biocellulose, chitosan and their composites in organic field-effect transistors (abstract only)
; Pereira, A. T. P.
; Pecoraro, E.
; Neto, C. P. N.
; Silvestre, A. J. D. Silvestre
; Ferreira, C. S. R. F.
; Trovatti, E.
; Fernandes, S. C. M. F.
Biocellulose, chitosan and their composites in organic field-effect transistors (abstract only), Proc International Thin-Film Transistor Conf. - ITC , Lisbon, Portugal, Vol. na, pp. na - na, January, 2012.
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Biocellulose (BC) is a biocompatible material produced by the Glucanacetobacter xylinus bacteria . It is renewable and biodegradable, being used in medical applications, is stable up to 260 °C and its dielectric constant is in the range 1.6 − 1.9 . BC-based materials are being studied for applications in organic electronics, either as substrate or as dielectric.
In this communication we report on the fabrication and characterisation of organic field-effect transistors incorporating biocellulose, chitosan or composites based on these materials, either as substrates or as dielectric. Organic semiconductors such as RR-poly(3-hexylthiophene) (P3HT) or poly(9,9-dioctylfluorene-alt-bithiophene), deposited by spin coating or by inkjet, and thermally deposited pentacene, are being used in such devices.
Figure 1 shows the output characteristics of a transistor prepared with P3HT and a 50 micron thick chitosan film as dielectric.
Acknowledgments: We thank FCT under the contracts PTDC/CTM/102144/2008 and PTDC/QUI/65474/2006 for financial support.
 É. Pecoraro, D. Manzani, Y. Messaddeq, S. J. L. Ribeiro, in Monomers, Polymers and Composites from Renewable Resources, (Eds: B. Mohamed Naceur, G. Alessandro), Elsevier, Amsterdam 2007, 369.
 L. Alcácer, J. Morgado, Q. Ferreira, É. Pecoraro, C. P. Neto, A. J. D. Silvestre, C. S. R. Freire, E. Trovatti, S. C. M. Fernandes, in EUROCON 2011, Lisboa, 2011.