ANM
2010
3rd
International Conference on Advanced Nano Materials
12-15 September 2010 - Agadir, Morocco
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Abstract
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ANMM219 |
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CHEMICAL REACTIONS OF POLYCICLIC AROMATIC HYDROCARBONS ON METAL SURFACES: BEYOND SELF ASSEMBLING |
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Jose A. Martín-Gago |
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Instituto Ciencia de Materiales de Madrid-ICMM- CSIC |
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Creating
or connecting together large organic molecules, as polycyclic aromatic
hydrocarbons (PAH) throughout chemical reactions readily on surfaces is
a preceding step for a truly advance in the field of molecular
electronics. In the last decade most of the experiments were devoted to
understand the structure and interactions of self-assembled monolayers
on surfaces. However, in the last years most of the efforts are
focused on forming more stable arrangements. The fundamental mechanisms
of these reactions can be investigated from the perspective of surface
science that combines the use of characterization techniques at the
nanoscale, with single-crystal metallic surfaces skilful to catalyse
these reactions. In this talk we will illustrate these ideas with
different examples. Formation of Surface covalent frameworks,
either by coordination reactions or by surface induced chemistry is at
present a subject of high interest. We will see how the dimensionality
of an assembled layer on a surface could originate systems with
different properties. In these examples the surface plays an important
role catalysing the reactions.
Thus, one of the most promising molecules for the molecular electronics
are fullerenes and heterofullerenes readily deposited on a surface. We
will show that we can synthesise fullerenes of different size and
composition, by using molecular precursors and taking advantage of the
catalytic properties of a surface. Finally, and looking
forward to applications we will see bio-molecules covalently bound to
metallic surfaces through a thiol-motif. Particularly we will see
a basic case of cysteine on gold, and an application derived from it,
self-assembled layers of DNA and PNA on gold surfaces for biosensing
applications.
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