CROSSDIFFUSIONROSSI

Cross-Diffusion and pattern formation in reaction diffusion systems

Coordinatore	UNIVERSITA' DEGLI STUDI DI SIENA    more  Organization address address: VIA BANCHI DI SOTTO 55 city: SIENA postcode: 53100 contact info Titolo: Prof. Nome: Silvano Cognome: Focardi Email: send email Telefono: -577232167 Fax: -577232163
Nazionalità Coordinatore	Italy [IT]
Totale costo	154˙013 €
EC contributo	154˙013 €
Programma	FP7-PEOPLE Specific programme "People" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013)
Code Call	FP7-PEOPLE-IOF-2008
Funding Scheme	MC-IOF
Anno di inizio	2009
Periodo (anno-mese-giorno)	2009-08-01   -   2011-07-31

 Partecipanti

#	participant	country	role	EC contrib. [€]
1	UNIVERSITA' DEGLI STUDI DI SIENA  Organization address address: VIA BANCHI DI SOTTO 55 city: SIENA postcode: 53100 contact info Titolo: Prof. Nome: Silvano Cognome: Focardi Email: send email Telefono: -577232167 Fax: -577232163	IT (SIENA)	coordinator	154˙013.61

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 Obiettivo del progetto (Objective)

'We propose to study spatiotemporal patterns that occur in chemically reacting systems as a result of cross-diffusion, the phenomenon whereby gradients in the concentration of one species affect the diffusion of another species. Patterns that arise by this mechanism appear to constitute a new class of self-organized structures that lies between thermodynamically stable structures like micelles or membranes and patterns like Turing structures or standing waves that exist only far from equilibrium. Our initial theoretical studies indicate that patterns induced by cross-diffusion can arise in quite simple reactions without the need for an activator-inhibitor couple. The predicted characteristic sizes of these patterns - tens to hundreds of nanometers with diffusion-controlled reactions - suggest their potential application in nanotechnology. We shall first reexamine patterns in such systems as the Belousov-Zhabotinsky reaction in AOT microemulsions and lipid membranes, the chlorite-iodide-malonic acid reaction and the ferrocyanide-iodate-sulfite reaction. Next, we shall apply numerical and analytic techniques to simple model systems with appropriate cross-diffusion coefficients to establish both the concentration dependence of cross-diffusion coefficients and the range of pattern formation to be expected. We will also make needed modifications to the Taylor dispersion method for measuring cross-diffusion coefficients in multi-component systems and apply this approach to systems containing both unreactive and reactive species. Combining the results obtained from these three approaches, we will carry out experiments to find novel patterns induced by cross-diffusion, i.e., we will tune cross-diffusion fluxes to generate patterns.'