Francesco Buatier de Mongeot
Mardi 06 juillet, à 11h00
I will review recent results relative to the self-organised formation of laterally ordered arrays of periodic nanostructures induced by ion beam sputtering (IBS) on crystalline model systems . The possibility to modify important chemico-physical properties of the nanostructures by tailoring their nanoscale morphology will be demonstrated recurring to examples in the field of catalysis , and of nano-magnetism .
In the second part of my talk I will show that the lessons derived from crystalline model systems can be successfully extended to the formation of nanoscale patterns polycrystalline metal films supported on low cost substrates . Particularly interesting, in view of Plasmon enhanced bio-sensing applications as well as of photovoltaic applications, appears the possibility to tune the optical and plasmonic properties of noble metal nanowire arrays produced by IBS on transparent substrates[5,6,7].
I will finally demonstrate that by ion beam sputtering it is possible to guide and substantially speed-up the self-organized formation of high aspect ratio nanostructures also on a substrate which would otherwise not be prone to develop an instability, if one recurs to a sacrificial metal film. Following ion irradiation, the film selforganises into a disconnected array of laterally ordered nanowires which guides etching of the underlying dielectric substrate like a stencil mask .
 A.Molle et al. Phys. Rev. Lett. 93, 256103 (2004)  F.Buatier de Mongeot et al. Phys. Rev. Lett. 97, 056103 (2006) [3 R. Moroni, et a. Phys. Rev. Lett. 91, 167207 (2003) ; D.Sekiba et al. Appl. Phys. Lett. 84, 762 (2004)  A. Toma, D. Chiappe, B. Šetina Batic, M. Godec, M. Jenko, and F. Buatier de Mongeot, Phys. Rev. B 78, 153406 (2008)  A. Toma, D. Chiappe, C. Boragno, and F. Buatier de Mongeot, Phys. Rev. 81, 165436 (2010)  A. Toma, D. Chiappe, D. Massabò, C. Boragno, and F. Buatier de Mongeot Appl. Phys. Lett. 93, 163104 (2008)  F. Buatier de Mongeot, et al. International Patent PCT Pub. No.:WO/2009/109939.  D. Chiappe, A. Toma, Z. Zhang, C. Boragno, F. Buatier de Mongeot, submitted (2010)