Discussion Lavoisier sur la synthèse chimique de nano-graphène et matériaux affiliés

On January 22nd and 23rd, a Lavoisier discussion will be held on Bottom-up Synthesis of Graphene Related Materials on the plateau de Saclay (south-west of Paris area), France.

For all details, please visit our website.

The bottom-up synthesis of graphene related materials such as graphene quantum dots, nanoribbons and nanomeshes (GQD, GNR and GNM) is an extremely prolific field of research. Materials with highly controlled structures and properties have been developed by “on-surface” synthesis or by synthesis in solution. This workshop aims at federating the French and European communities working in this field through tutorials and presentations of the most recent results. It is dedicated not only to confirmed researchers in the field but also to young researchers who want to initiate projects on this topic and take part of this activity.

The workshop is organized by IRAMIS (CEA Paris-Saclay) and LuMIn (ENS Paris-Saclay) and will take place in the new building of the ENS Paris-Saclay.

Lavoisier discussions series are prospective workshops on research areas covered by the national research group (GDR) and the international coordination network (IRN) related to low-dimensional van der Waals heterostructures HOWDI..

The two groupements de recherche (GDRs), NS-CPU (Nanosciences with near-field microscopies under ultra high vacuum) and HOWDI (Heterostructures of van der Waals materials with low dimensionality) jointly organise a two-half-days workshop. The objects of interest, 2D materials and their heterostructures, are essentially surfaces. They are hence ideally suited to investigations with high-resolution local probes.

Topics covered by the workshop :

Photonics, including single-photon sources, exciton localisation, role of electrostatic disorder
Magnetism, including isolated or in-interaction spins, magnons and moiré effects
Electronic correlations, including spin impurities in 2D semiconductors, superconductivity, charge density waves

Location : Université de Paris Cité (Paris 13eme), 6-7 Feb. 2024

Information & registration : click here.

The 13th edition of Graphene Conference series, the largest European Event in Graphene and 2D Materials, will be organized in-person at the Engineering Building A of the University of Manchester (UK): June 27-30, 2023.

The 13th edition of Graphene Conference series, the largest European Event in Graphene and 2D Materials, will be organized in-person at the Engineering Building A of the University of Manchester (UK): June 27-30, 2023. Over the past editions, the Graphene Conference strengthened its position as the main European in-person meeting point of the Graphene community.

Following the success of previous editions, the INDUSTRIAL FORUM will keep the 2 days format (June 28-29, 2023) and will present the most recent advances in technology developments and business opportunities in graphene commercialization. Key representatives of “graphene companies” will share their market vision and business opportunities, while selected talks from industrial exhibitors will present commercial showcases in all current market fields of graphene products.

A Brokerage event (one-to-one meetings) will be organised within Graphene2023 in Manchester on Thursday June 29, 2023 to encourage companies, universities and research centers to foster technical cooperation in the field.

Graphene2013 is an event supported by GDR HOWDI : 12 grants for PhDs and postdocs are available upon application.

Contact person: Dr. Antonio Correia (Phantoms Foundation, Spain) – antonio@phantomsnet.net

Hexagonal Boron Nitride: New Theory Developments on a Well-Known 2D Material

Ludger Wirtz

Department of Physics and Materials Science
University of Luxembourg

https://univ-grenoble-alpes-fr.zoom.us/j/93458694522?pwd=a1FxaXpGU3ZCQVk3bkpDdjJtZlNqUT09

Next virtual seminar of the GDR : 6 March 2023, 13h30

Hexagonal Boron Nitride: New Theory Developments on a Well-Known 2D Material

Ludger Wirtz

Department of Physics and Materials Science
University of Luxembourg

Layered hexagonal Boron Nitride (hBN) is often used as a flat, clean, and well-insulating substrate for the investigation of graphene or other 2D materials. But its intrinsic optical properties - in the deep UV - are interesting by itself: the strong luminescence and its potential for UV-lasing was discovered in 2004 [1] by the group who still distributes high-quality samples of hBN to the whole 2D community. The presence of huge excitonic effects in bulk hBN was theoretically established by ab-initio calculations [2]. Soon afterwards, it was established that the binding energy in single-layer hBN is even 3 times higher [3]. Since then, the surprising complexity of the luminescence spectra of this seemingly simple material (with only 4 atoms per unit-cell for bulk hBN and 2 atoms for monolayer hBN) has attracted a lot of attention by theoretical and experimental groups likewise. A lot of the recent progress on this material has been achieved by (or in collaboration with) French research groups.

I will discuss the role of crystal symmetry in the optical spectra of hBN and explain how to understand the luminescence of different phases of BN from a theoretical/computational perspective, taking into account the strong excitonic effects and its coupling with phonons. I will give a perspective on non-adiabatic effects in the Raman spectra of bulk hBN and on the understanding of the substrate-dependence of the luminescence spectra of mono-layer hBN.

[1] K. Watanabe, T. Taniguchi and H. Kanda,
Direct-bandgap properties and evidence for ultraviolet lasing of hexagonal boron nitride single crystal,
Nature Materials 3, 404–409 (2004).
[2] B. Arnaud, S. Lebègue, P. Rabiller, and M. Alouani,
Huge Excitonic Effects in Layered Hexagonal Boron Nitride,
Phys. Rev. Lett. 96, 026402 (2006).
[3] L. Wirtz, A. Marini, and A. Rubio,
Excitons in Boron Nitride Nanotubes: Dimensionality Effects,
Phys. Rev. Lett. 96, 126104 (2006).

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Zoom connection info :

Time: Mar 6, 2023 01:30 PM Paris

Join Zoom Meeting
https://univ-grenoble-alpes-fr.zoom.us/j/93458694522?pwd=a1FxaXpGU3ZCQVk3bkpDdjJtZlNqUT09

Meeting ID: 934 5869 4522
Passcode: 330150

The next edition of the NT conferences series will be held in Arcachon, France, June 4-9, 2003.

NT’23 conference
(23rd International Conference on the Science and
Application of Nanotubes and Low-Dimensional Materials)
will be held at the Conference Center in the seaside town of Arcachon,
near Bordeaux, France, June 4-9, 2023.

Important Dates

• December 15, 2022 Registration Open
• January 10, 2023 Submission Open
• February 26, 2023 Abstract submission deadline
• March 29, 2023 Notification of acceptance
• April 11, 2023 Early bird registration deadline
• May 7, 2023 Late registration deadline

Note that due to physical space limitations, the total number of attendees cannot extend over 350 people. Registration will be granted upon first come first serve policy.

Keynotes speakers (confirmed):

• Pr. Young Hee Lee, Sungkyunkwan University, South Corea
• Pr. Katalin Kamarás, Wigner Research center for Physics, Austria
• Pr. Richard Martel, University of Montreal, Canada
• Pr. Matteo Pasquali, Rice University, USA
• Pr. Ming Zheng, NIST, USA

Click here for more information

The annual meeting of the GDR will take place from 8 – 12 May 2023 in Porquerolles (Mediterranean sear shore)

All information is available here: https://howdi2023.sciencesconf.org/

Important dates :

03/03/2023 - Abstract Submission Deadline
03/04/2023 - Inscription and payment deadline

Marcello Lopes (Berlin, Germany)
"Epitaxial Growth of 2D Materials and Heterostructures"
Thu 2 Feb. 2023 (11h)

Next virtual meeting the GDR HOWDI will be held online
Thursday, February 2nd, 2023 at 11h

Marcelo Lopes (Paul-Drude-Institut für Festkörperelektronik, Berlin, Germany)

Epitaxial Growth of 2D Materials and Heterostructures

Abstract :

Van der Waals (vdW) heterostructures combining different 2D materials
have a great prospect for the realization of atomically thin devices
with tailored properties. To achieve a high density, bottom-up
integration, the synthesis of such heterostructures
via vdW epitaxy is a promising alternative to layer transfer, which is
problematic in terms of scaling and reproducibility. Nevertheless, due
to the weak bonding between 2D crystals, vdW epitaxy is sensitive to
various surface defects, usually leading to uncontrolled nucleation and
thus non-uniform growth of polycrystalline material. In this talk, I
will present results on molecular beam epitaxy (MBE) of hexagonal boron
nitride (h-BN) on graphene/SiC(0001). Specifically, I will discuss how
defect engineering in graphene can be employed to exert the control over
nucleation and thus to realize selective area growth of h-BN. In
addition, I will show our recent studies on ferromagnetic vdW
heterostructures with perpendicular magnetic anisotropy and high
transition temperatures, which were realized via MBE growth of the novel
2D ferromagnetic metal Fe5-xGeTe2 (FGT, with 0 ≤ x ≤ 2) on graphene as
well as h-BN templates.

Connexion info :
Time: Feb 2, 2023 11:00 AM Paris

Join Zoom Meeting
https://univ-grenoble-alpes-fr.zoom.us/j/95627215262?pwd=Y0dZMTh6OXljQVFXUzE0Z2xEcnJTQT09

Meeting ID: 956 2721 5262
Passcode: 969980