PostDoc position opening on the following topic: Elaboration and study of physical properties of graphene-based nanostructures
|Context of the research project
The discovery of new 2D materials with original electronic band structures has initiated a tremendous interest for studying how further modification of their morphology can affect these physical properties. One of the main objectives has been to find alternatives to conventional top-down manufacturing of tailored graphene-based structures originally demonstrating semimetal electronic properties. The bottom-up approach using on-surface reaction of molecular precursor’s proved to be an efficient method for growth of one- and two-dimensional graphenic architectures on metal surfaces (e.g., via Ullmann coupling and cyclo-dehydrogenation). Following this strategy, different tailored graphene nanostructures like graphene nanoribbons (GNRs) can be elaborated that permit tuning their electronic properties from semimetal to semiconducting. This holds great promises for future integration of these graphenic materials into vertical van der Waals heterostructures assembling together isolating, semimetal, and semiconducting 2D materials.
Inspired by these studies, the project proposed in our group will be focused on the investigation of atomic structure, electronic and electrical properties of tailored graphene-based materials that will be grown on surfaces of different nature followed by their transfer on targeted substrates.
||The candidate should have a strong interest in experimental work. Knowledge of surface science, ultra-high vacuum (UHV) techniques and Scanning Probe Microscopy (SPM) would be clear advantages for this project.
The study will be mainly conducted in UHV condition:
✓ Substrate’s preparation and deposition of molecules on these surfaces by molecular beam epitaxy (MBE)
✓ Synthesis of graphene-based nanostructures via on-surface reaction
✓ Investigation of their structures at atomic scale and electronic properties with scanning tunneling microscopy (STM), atomic force microscopy (AFM), scanning tunneling spectroscopy (STS)
The candidate will also be involved in studies at ambient conditions:
✓ Electrical measurement with contact AFM (c-AFM), Kelvin probe force microscopy (KPFM), and electrostatic force microscopy (EFM);
✓ Transfer of GNRs from the growth to the targeted substrate;
✓ Fabrication of vertical vdW heterostructures.
The candidate should be able to work both independently and in a collaborative environment (i.e. interact with physicists, chemists and theoreticians). Good communication skills and knowledge of English are required since the candidate will participate in the dissemination of his/her research to the international community: publications in scientific journals, conferences, general public communication, etc. Working environment
|To apply :
||Interested candidates are invited to send a CV, motivation letter and contact details of two referees to
Junior Professor Chair
Tel: (+33) 03 20 19 79 07
Unité d’accueil :
IEMN UMR CNRS 8520
59652 VILLENEUVE D ASCQ CEDEX
Date de début souhaitée :Octobre 2023
Durée souhaitée :1 an
Les candidatures accompagnées d’un CV et de 2 lettres de recommandation doivent être envoyées à :
Junior Professor Chair
tel : 03 20 19 79 07