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.

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Forthcoming Events


Electronic stopping power from first principles
Emilio Artacho  read more


Role of ions in solid-liquid interfaces investigated by molecular simulations
Lidija Zivanovic  read more


Time-Reversal symmetry breaking superconductivity in Dirac materials: application to NbxBi2Se3
Luca Chirolli  read more


Cover CrystEngComm. H. Gavilán, M. Puerto Morales. Diseño Arturo Pérez.

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Back Cover Adv. Func. Mat. E. Ruiz-Hitzky, A. Gómez-Avilés y P. Aranda, ICMM.

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Clay-Graphene Nanoplatelets Functional Conducting Composites

Eduardo Ruiz-Hitzky, Maria Madalena C. Sobral, Almudena Gómez-Avilés, Claudia Nunes, Cristina Ruiz-García, Paula Ferreira, Pilar Aranda

An approach to functionalize graphene-based materials has been developed by assembling graphene nanoplatelets (GNP) with clay minerals. Under convenient sonomechanical treatment, clay–GNP mixtures may produce very stable water dispersions in particular using sepiolite fibrous clay. While in the absence of clay a rapid decantation of GNP in water is observed, in the presence of sepiolite the resulting dispersions remain stable during months without syneresis effects. Rigid but flexible self-supported films are easily obtained by filtering of these dispersions. As the electrical percolation threshold corresponds to sepiolite/GNP composites of 0.5:1 in weight, doping these systems with multiwalled carbon nanotubes (MWCNTs) significantly enhances their electrical conductivity. The particular microporosity of the sepiolite component allows interactions with molecules, such as organic dyes, as well as polymers, such as biopolymers, opening the way to functional materials for advanced applications due to their inherent conductivity afforded by the GNP and MWCNTs carbonaceous components. In fact, using very small amount of MWCNT together with GNP can obtain composites with significant electrical conductivity, maintaining the enhanced mechanical properties, at a lower cost.

Adv. Func. Mater.

A) Scheme of sepiolite fibers arranged as bundles, B) ideal cross-section of a single fiber, and C) crystal structure with alternating blocks of magnesium silicate and tunnels. Locations of silanol groups of the silicate at the external surface of fibers are also indicated in (C).

Publications Highlights

ICMM-2016 - Sor Juana Inés de la Cruz, 3, Cantoblanco, 28049 Madrid, Spain. Tel: +34 91 334 9000. Fax: +34 91 372 0623. info@icmm.csic.es