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.

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Forthcoming Events

MAR30/12:00

Unconventional Superconductivity Cast in Iron
Raymond Osborn  read more

MAR31/12:00

INORGANIC MULTIFUNCTIONAL NANOSTRUCTURES BASED ON IRON OXIDE
Yurena Luengo Morató  read more

APR03/12:00

Floquet and dissipative engineering in mesoscopic systems
Mónica Benito González  read more

News

Polvo de estrellas ‘made in Spain’. Columna de opinión de Rosa Montero, sobre el proyecto NANOCOSMOS del ICMM, en la revista el Informador.mx

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Perovskita híbrida para fabricar células solares más baratas. Grupo Electronics and Magnetic materials and Heterostructures, ICMM.

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Carbon Allotrope Nanomaterials Based Catalytic Micromotors

R. Maria-Hormigos, B. Jurado-Sanchez, L. Vazquez, and A. Escarpa

Carbon allotropes nanomaterials are explored here for the preparation of highly efficient tubular micromotors: 0D (C60 fullerene), 1D (carbon nanotubes), 2D (graphene), and 3D (carbon black, CB). The micromotors are prepared by direct electrochemical reduction or deposition of the nanomaterial into the pores of a membrane template. Subsequent electrodeposition of diverse inner catalytic layers (Pt, Pd, Ag, Au, or MnO2) allows for efficient bubble-propulsion in different media (seawater, human serum, and juice samples). Atomic-force microscopy (AFM) and scanning electron microscopy characterization reveals that the micromotors exhibit a highly rough outer surface and highly microporous inner catalytic structures. A key aspect derived from the AFM characterization is the demonstration that the rough outer surface of the micromotors can greatly affect their overall speed. To date, the literature has only focused on studying the effect of the inner catalytic layer upon their speed and performance and has underestimated the effect of the outer surface layer. The speed of carbon-based micromotors is a compromise between two opposite forces: the increased catalytic activity because of improved fuel decomposition in the inner catalytic layer, which propels their advance, and the friction of the rough outer surface with the fluid, which is opposed to it. The largest outer surface area associated with the highest surface roughness of C60 fullerene and carbon black-Pt micromotors leads to a large friction force, which results in a reduced speed of ∼180 μm/s (1% H2O2). In contrast, for carbon-nanotube-Pt based micromotors, the dominant force is the high catalytic activity of the micromotor, which allows them to reach ultrafast speeds up to 440 μm/s (1% H2O2). The new protocol opens new avenues for the universal preparation of carbon based multifunctional micromotors for a myriad of practical applications exploiting the features of carbon allotropes.

Chem. Mater., 2016

Publications Highlights

ICMM-2017 - 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