Elaboration and study of physical properties of graphenic carbon nitrides nanostructures (M/F)

Job Description

Thesis Subject

The discovery of novel 2D materials with unique electronic band structures has generated significant interest in understanding how modifications in their morphology and elemental composition can influence their physical properties. A major objective in this field has been to develop alternatives to conventional top-down fabrication methods of tailored graphene-based structures, which originally exhibit semimetallic electronic properties. In this context, bottom-up approaches based on on-surface reactions of molecular precursors (e.g., via Ullmann coupling and cyclodehydrogenation) have proven to be highly efficient for the growth of nanostructured one- and two-dimensional graphenic architectures on metal surfaces with tunable electronic properties, ranging from semimetallic to semiconducting behavior. By the same time, advances in solution-phase molecular chemistry also made possible the synthesis of extended 2D conjugated networks.
Building on these advances, the proposed PhD project will focus on the synthesis of suitable molecular precursors, followed by the growth of porous 2D carbon nitride (CxNy) layers using two complementary approaches: traditional wet chemistry (i.e., the Fittig reaction) and UHV-based on-surface synthesis as described above. Particular emphasis will be placed on investigating the atomic structure, chemical composition, electronic and vibrational properties of the resulting CN-based materials, grown or drop-casted on substrates of different nature.

Your Work Environment

The project will be carried out jointly at the Institut de Chimie Moléculaire et des Matériaux d'Orsay (ICMMO, Saclay) and the Institut d'Électronique, de Microélectronique et de Nanotechnologies (IEMN, Villeneuve d'Ascq). It will involve several research groups, including the ECI group at ICMMO and the NCM/EPIPHY groups at IEMN.
The candidate will have access to a chemistry laboratory at ICMMO equipped with all the necessary facilities for molecular synthesis and characterization. In addition, the project will benefit from the advanced infrastructure available at IEMN, including (i) a multi-physics characterization platform (PCMP) and (ii) a 1600 m² ISO6 cleanroom. In particular, the candidate will work within the Pôle Microscopie en Champ Proche (PCP), one of the core facilities of the PCMP platform. The PCP brings together state-of-the-art equipment dedicated to the topographical, physical, and electrical analysis of surfaces, covering length scales from 100 µm down to the atomic level, including techniques such as STM, AFM, and KPFM.

Compensation and benefits

Compensation

2300 € gross monthly

Annual leave and RTT

44 jours

Remote Working practice and compensation

Pratique et indemnisation du TT

Transport

Prise en charge à 75% du coût et forfait mobilité durable jusqu’à 300€

About the offer

About the CNRS

The CNRS is a major player in fundamental research on a global scale. The CNRS is the only French organization active in all scientific fields. Its unique position as a multi-specialist allows it to bring together different disciplines to address the most important challenges of the contemporary world, in connection with the actors of change.

CNRS

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