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Accueil > Séminaires > Année 2021 > Séminaire de Jean-François Dayen (21 septembre)

Séminaire de Jean-François Dayen (21 septembre)

Institut de Physique et de Chimie des Matériaux de Strasbourg (CNRS/Unistra)

par Martrenchard-Barra Séverine - 1er juin 2021 (modifié le 13 septembre 2021)


Le séminaire sera accessible dans l’amphi (dans la limite de 48 auditeurs) et également diffusé en visioconférence. Les personnes extérieures au laboratoire qui souhaitent disposer du lien sont invitées à envoyer un mail à l’adresse

seminaires.ismo@universite-paris-saclay.fr

Elles recevront le lien pour se connecter en retour.

Mixed-dimensional van der Waals heterostructures :
a versatile platform from optoelectronics to molecular electronics.

Because of their atomically-thin structure, high surface to volume ratio, and reduced electric screening, new properties and functionalities are expected to emerge when exploiting the interactions of two dimensional (‘2D’) materials placed in contact with other nanomaterials such as zero dimensional (‘0D’) systems including clusters, nanocrystals and molecules. These so-called Mixed-dimensional van der Waals Heterostructures are now at the forefront of basic nanoscience and applied nanotechnology, providing new sets of possibilities to tailor device functions and novel physical properties.[1]
Today, I will present some of our recent achievements and on-going works illustrating the possibilities offered by such heterostructures in various fields of nanoelectronics including single-electron electronics [2], molecular electronics[3,4] and optoelectronics[5]. These 0D-2D devices take advantage of the functionalities of the 0D systems (electronic, magnetic, optic…) and of the specific properties of 2D materials such as : i) van der Waals interface, ii) high diffusion of metals enabling self-ordered growth of nanoclusters, iii) dual electric behavior combining in-plane charge transport with out-of-plane electric field transparency (they are thinner than the Debye screening length), iv) exacerbated surface/interface sensitivity. The works selected for this talk will allow me to introduce some of these concepts.

References : [1] D. Jariwala et al., Nat. Mater. 2017, 16, 170 ; [2] Mouafo et al, Adv. Mater. 2018, 30, 1802478 ; Mouafo et al., Adv.Func.Mat. 2021, 31, 2008255 ; Godel et al., Adv. Mater. 2017, 29, 1604837 ; [3] Konstantinov, J. Mat. Chem. C. 2021, 9, 2712 ; [4] J.F. Dayen et al. Mater. Horiz., 2021, 8, 2310-2315 ; [5] Noumbe et al., ACS Nano 2020, 14, 4567.