Welcome to espacio-ICMM!

Through this ICMM space slack account you will be able to navigate the funk, padel, soccer, dance, articles-icmm, scientic-questions channel and many other things such as helping the new icmm-nautas. You can also open your own #channel to find people who share your interests. Join us! Read more

About

The Instituto de Ciencia de Materiales de Madrid (ICMM) is an institute of the Consejo Superior de Investigaciones Cientificas (CSIC) (Spanish National Research Council) founded in December 1986, that belongs to the Area of Science and Technology of Materials, one of the eight Areas in which the CSIC divides its research activities.

 

Our mission is to create new fundamental and applied knowledge in materials of high technological impact, their processing and their transfer to the productive sectors at local, national and European scales (the true value of materials is in their use), the training of new professionals, and the dissemination of the scientific knowledge.

How to arrive

Forthcoming Events

APR25/12:00

Thermoelectric graphene nanostructures
Francisco Domínguez-Adame  read more

APR29/12:00

Novel Applications of High Frequency Radiations:
I) THz Radiation and Art, a New Tool in the Inspection of Cultural Heritage. II) Potential Use of GHz Radiation in Medicine

Javier Tejada Palacios  read more

MAY06/12:00

Internal screening and dielectric engineering in magic-angle twisted bilayer graphene
J. M. Pizarro  read more

Reversible graphene decoupling by NaCl photo-dissociation

I. Palacio, L. Aballe, M. Foerster, D. G. de Oteyza, M. García-Hernández and J. A. Martín-Gago

We describe the reversible intercalation of Na under graphene on Ir(1 1 1) by photo-dissociation of a previously adsorbed NaCl overlayer. After room temperature evaporation, NaCl adsorbs on top of graphene forming a bilayer. With a combination of electron diffraction and photoemission techniques we demonstrate that the NaCl overlayer dissociates upon a short exposure to an x-ray beam. As a result, chlorine desorbs while sodium intercalates under the graphene, inducing an electronic decoupling from the underlying metal. Low energy electron diffraction shows the disappearance of the moiré pattern when Na intercalates between graphene and iridium. Analysis of the Na 2p core-level by x-ray photoelectron spectroscopy shows a chemical change from NaCl to metallic buried Na at the graphene/Ir interface. The intercalation-decoupling process leads to a n-doped graphene due to the charge transfer from the Na, as revealed by constant energy angle resolved x-ray photoemission maps. Moreover, the process is reversible by a mild annealing of the samples without damaging the graphene.

2D Materials

Microspot-LEED patterns from stages 1 to 3: NaCl/Gr/Ir(1 1 1)  →  Gr/Na/Ir(1 1 1)  →  Gr/Ir(1 1 1) taken at 65 eV, 60 eV and 65 eV respectively.

ICMM-2019 - Sor Juana Inés de la Cruz, 3, Cantoblanco, 28049 Madrid, Spain. Tel: +34 91 334 9000. info@icmm.csic.es