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Seminarios y Eventos

Seminars and Events

Coloquios

Coordinadora: Concepcin Gutirrez


30 March 2020, 12:00 h. Saln de Actos

APLAZADO


Cold Sintering of Functional Materials
IEEE Distinguished Lecture

Clive Randall
Materials Research Institute, The Pennsylvania State University, Univ Park, USA

Cold Sintering involves a transient phase that permits the densification of particulate materials at low temperatures 300 C and below. Sintering at such low temperature offers so many new opportunities. It permits the integration of metastable materials that would typically decompose at high temperatures. So cold sinter enables a platform for better unification of material science. Now ceramics, metal and polymers can be processed under a common platform in one step processes. With controlling the forming process new nanocomposites can be fabricated. Polymers, gels and nanoparticulates can be dispersed, interconnected and sintered in the grain boundaries of a ceramic matrix phase. With the ability to sinter metal phases, multilayer devices can be co-sintered with electrodes made from metals such as Al, Ag, Fe and Cu. With appropriate binder selection, polypropylene carbonate and its de-binding at 130 C we can remove organic binders and leave metals and other more stable polymers within the layers that then can be co-sintered under the cold sintering process and form unique combinations of materials in multilayers. This talk will cover some of the fundamentals of cold sintering, as well as some new examples of this technology across different material systems, ranging from ferroelectrics, semiconductors, and battery materials.



17 February 2020, 12:00 h. Saln de Actos

The Scientist I Like to Talk About

Andrs Castellanos, Ricardo Garca, Jos ngel Martn Gago, Marcos Zayat
Instituto de Ciencia de Materiales de Madrid

As every year, the ICMM dedicates Februarys Colloquium to celebrate 11th February, the International Day of Woman and Girl in Science. This year 4 male researchers of our institute will talk about the research work developed by noticeable female scientists in different fields: Rosalind Franklin (Chemistry and Crystallography), Margarita Salas (Biochemistry), Mildred Dresselhaus (Physics and Nanotechnology), Rita Levi-Montalcini (Neurology) and Petra Rudolf (Solid-state Physics).

With this colloquium the ICMM wants to subscribe the multiple initiatives that are going to take place these days in the world with a common goal: tackling and removing the gender barriers at the technological and scientific fields while promoting the gender equality in the personal growth.



20 January 2020, 12:00 h. Saln de Actos

From the origin of the Universe to the detection of exoplanets: The Nobel Prize in Physics 2019

J. Miguel Mas Hesse
Centro de Astrobiologa (CSIC-INTA)

The Royal Swedish Academy has decided to award the Nobel Prize in Physics 2019 to three scientists working in different topics, from the Origin of the Universe to the Planets orbiting around other stars. James Peebles made very relevant and direct participation to the prediction of the properties of the Cosmic Microwave Background (CMB) produced after the Big Bang, and specifically to the identification of its anisotropies as the seed from the big structures of the actual Universe were emerged. This CMB would be discovered by R. Penzias y A. Wilson in the middles 60s of the XXth century. On the other hand, in 1995, Michel Mayor and his Ph.D. student, at that time, Didier Queloz, discovered the first planet orbiting around a Solar-type star. There was a conviction about the existence of planetary systems similar to our solar system but it wasnt until the Mayor and Queloz work that this issue was proved.
Nowadays, more than 4000 exoplanets are known, a lot of them with conditions that could allow a life analogous to the one on Earth, and their detection will be the main goal in the next 10 years.
In this seminar, we will review the advances in both research fields and their impact on the development of Knowledge. Besides being very different results, both fields provide a new perspective on the place that humans have in the Cosmos.



17 December 2019, 12:30 h. Saln de Actos

Nobel Prize in Chemistry 2019 to the Development of Li-ion Batteries: from Intercalation Chemistry to a Rechargeable World

Rosa Palacn Peir
Dept. of Solid State Chemistry, Institut de Cincia de Materials de Barcelona

The Nobel Prize in Chemistry 2019 was awarded jointly to John B. Goodenough, M. Stanley Whittingham and Akira Yoshino for the development of lithium-ion batteries.
This technology is rooted in the study of intercalation chemistry in inorganic materials developed in the 70s. The potential in electrochemical energy storage was soon harnessed and cell demonstrators were assembled by Stan Whittingham using TiS2 cathodes and lithium metal anodes. Later on, John Goodenough understood that oxides would enable higher voltages than sulfides and suggested the use of LiCoO2 instead, which is still employed in commercial batteries today. Finally, the picture would not be complete if the potential of carbonaceous anodes in organic liquid electrolytes had not been realized by Akira Yoshino.
Li-ion batteries powered the revolution in portable electronics and are paving the way to the advent of electrified transportation and large-scale storage to balance renewable sources contribution to the grid, in words of the Nobel Committee they have created a rechargeable world.
The battery research community involves today thousands of researchers all around the world, including chemists, physicists, materials scientists and engineers cooperating to push this technology forward to increase performance and sustainability and also unravel new battery chemistries beyond Li-ion.
Aside from controversial debates on lithium supply, the development of new sustainable battery chemistries based on abundant multivalent elements is appealing, especially because the use of metal anodes would bring a breakthrough in terms of energy density.



11 November 2019, 12:00 h. Saln de Actos

Optics and Biomaterials to Improve Vision

Susana Marcos Celestino
Visual Optics and Biophotonics Lab, Instituto de ptica "Daza de Valds", CSIC

I will be presenting how the use of optical technologies allows us to understand the relations between the geometry, biomechanics and structure of the cornea and crystalline lens and the optical quality of the eye, as well as the relations between optical and perceived quality. Gaining insights on these relations does not only allow a deeper understanding of the mechanisms of vision, but also powerful guiding for new ways of intervention to improve vision. Technologies include 3-D quantitative anterior segment optical coherence tomography, wavefront sensing, and adaptive optics and temporal multiplexing visual simulators. Applications include new instrumentation that has made its way to the clinic, and new eye-inspired intraocular lenses, light-based treatments, and new biomaterials for corneal bandages and intracorneal implants



11 October 2019, 12:00 h. Saln de Actos

Materials Science Applications of Carbon Dots

Raz Jelinek
Department of Chemistry, Ben Gurion University (Israel)

Carbon dots (C-dots) are small (on the order of 10 nm or less), quasi-spherical graphitic nanoparticles and have attracted considerable interest due to their unique structural, electronic, and optical properties, as well as their biocompatibility. In particular, C-dots exhibit multicolor, tunable fluorescence emissions, dependent upon both the nanoparticles surface units and their molecular environments. In this presentation I will describe recent work from my laboratory demonstrating varied applications in materials science, sensing, and imaging.



09 September 2019, 15:30 h. Saln de Actos

AIE Luminogens: A Family of Conceptually New Materials

Ben Zhong TANG
Center for Aggregation-Induced Emission, South China University of Technology, Guangzhou, (China)
The Hong Kong University of Science and Technology, Hong Kong, (China)

Luminescent molecule based materials are important members of advanced materials, and have received considerable attention from both scientific and industrial communities. Traditional luminophores usually suffer from emission weakening or quenching in aggregated state and these phenomena which are notoriously known as aggregation-caused quenching (ACQ) largely limit the application scope of them. In 2001, we found that some propeller-like molecules showed luminescence behavior that was exactly opposite to the ACQ effect: the aggregate formation turned on their light emissions, changing them from weak fluorogens into strong emitters. We termed this novel phenomenon as aggregation-induced emission (AIE) and called these luminescent molecules as AIEgens. Through systematic study it has been rationalized that the restriction of intramolecular motions (RIM) is highly responsible for the AIE effect, and a great number of new AIEgens have been developed with emission colors covering the entire visible, extending into UV and near-infrared (NIR) spectral region under the guidance of RIM mechanism. Based on the tunable photophysical processes, AIEgens have been widely applied in many high-tech fields such as optoelectronics, chemosensing, bioimaging, etc, and have been formed a group of conceptually new and promising materials.



     

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