12 November

From molecules to atomically precise low dimensional materials

Monday 12 November 2018, 12:00pm

Sala d'Actes Carles Miravitlles ICMAB, Campus UAB

ICMAB Periodical Lecture

By César Moreno, Atomic Manipulation and Spectroscopy Group, ICN2

Abstract: On-surface reactions, via programmed interactions of molecular building blocks, has recently emerged as a promising route to synthesise atomically precise materials from the ‘bottom-up’. This approach ensures exquisite atomic-scale control of the structural and chemical functionalization, allowing to design a vast number of carbon-based nanoarchitectures not available by traditional solution chemistry nor with the ‘top-down’ methodologies. In particular, graphene nanoribbons (GNRs) with different structures can be synthesized with atomic precision and fine-tuned electronic band gap.

In this talk, I will describe the recent advances in the on-surface synthesis field. Then, I will discuss our recent results to synthetize atomically precise nanoporous graphene, graphene nanoribbons and their chemical functionalization and how to organize them into superlattices. At the end of the day, this talk will demonstrate the full path to synthetize a semiconducting graphene material with a bandgap similar to that of silicon, its atomic-scale characterization, and its implementation in an electronic device. Further potential applications include in photonics and highly selective molecular filtration and sensing systems.

Hosted by Mariona Coll and Carmen Ocal