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Two-dimensional organic (bio)layers on surfaces

AuthorsLópez, María Francisca ; Méndez, Javier ; Martín-Gago, José A.
Issue DateSep-2014
Citation13th European Vacuum Conference (2014)
9th Iberian Vacuum Meeting (2014)
7th European Topical Conference on Hard Coatings (2014)
Special symposium "Ultra thin oxide films and oxide coatings applications" (2014)
AbstractSurface-assisted cyclodehydrogenation and de hydrogenative polymerisation of polycyclic (hetero)aromatic hydrocarbons (PAH) are among the most important strategies for bottom-up assembly of new nanostructures from their mo lecular building blocks. Although diverse compounds have been formed in recent year s using this methodology, a limited knowledge on the molecular machinery operating at the nanoscale has prevented a rational control of the reaction outcome. By controlling surface diffusion of N-heteroaromatic precursors, the on- surface dehydrogenation can either lead to monomolecular triazafullerenes and diazahexabenzocoronenes (N-doped nanographe ne), to N-doped oligomeric or polymeric networks, or to carbonaceous monolayers. G overning the on-surface dehydrogenation process is a step forward towards the tailored fabrication of molecular 2D nanoarchitectures distinct to graphene and exhibiting new properties of fundamental a nd technological interest. We combined advanced in-situ surface techniques as STM and NEXAFS with theoretical ab- initio calculations to achieve a complete unders tanding of the self-assembling of molecular precursors on surfaces. Herein, by merging info rmation from these techniques and different single-crystal metal substrates, we report on the diffusion control of competitive intramolecular and intermolecular dehydrogenative processes respectively called cyclodehydrogenation and dehydrogenative polym erisation, which operate in the on-surface synthesis of N-doped fullerene, nanographene, polyaromatic netw ork, membrane or graphene.
DescriptionTrabajo presentado en la 13th European Vacuum Conference, la 9th Iberian Vacuum Meeting, la 7th European Topical Conference on Hard Coatings y el Special symposium "Ultra thin oxide films and oxide coatings applications", celebrados en Aveiro (Portugal) del 8 al 12 de septiembre de 2014.
Appears in Collections:(ICMM) Comunicaciones congresos
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