A supprimer... - Séminaires Nano

Friday 15 October 2010 à 11h00.

Nanostructured surfaces: organising atoms, nanoclusters and proteins to create functional architectures

''ce séminaire de quartier aura lieu à l'amphithéâtre Gouy This talk will address the interface between inorganic and organic materials at nanostructured surfaces. Two complementary methods to generate surface features on the sub-10 nm scale will be considered: (i) room temperature manipulation of individual organic molecules with the scanning tunnelling microscope (STM) and (ii) the deposition of size-selected atomic clusters (nanoparticle beams) on surfaces. The common underpinning themes will be the issues of precision and uncertainty in the organisation of atoms and the challenge of translating such structures into functional device architectures with realistic economic prospects. Atomic manipulation is the extreme limit of nanotechnology. I will briefly demonstrate non-local, bond-selective manipulation (e.g., “molecular dissection” [1]) of a polyatomic molecule, chlorobenzene (C6H5Cl), anchored to a silicon surface at room temperature [2]. This type of 'remote control' of molecular manipulation via site-specific charge injection then charge transport across the Si(111)-7x7 surface may have implications (ultimately!) for solar energy harvesting. The controlled deposition of size-selected clusters (nanoparticles), assembled from atoms in the gas phase, is an alternative (and economically efficient) route to the fabrication of surface features of size Y. Li, B.M. Quinn and R.E. Palmer, JACS (Communications) 132 2854 (2010). Contact details: Telephone (fax): +44 121 414 4653 (7327) r.e.palmer@bham.ac.uk www.nprl.bham.ac.uk''