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8º Encuentro Franco-Español De Química Y Física Del Estado Sólido

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8º Encuentro Franco-Español De Química Y Física Del Estado Sólido 8º Encuentro Franco-Español de Química y Física del Estado Sólido ABSTRACT BOOK www.efe-es.com ABSTRACT BOOK Órden según programa | Classement par ordre de programme CONFERENCIAS INVITADAS CONFERÉNCES INVITÉES www.efe-es.com FROM IMPLANTS TO REGENERATIVE MEDICINE María Vallet Regí Dpto. Química Inorgánica y Bioinorgánica. Universidad Complutense de Madrid. Instituto de Investigación Sanitaria Hospital 12 de Octubre i+12. Madrid, Spain Centro de Investigación Biomédica en Red de Bioingeniería, Biomateriales y Nanomedicina (CIBER- BBN), Madrid, Spain [email protected] The use of biomaterials in patients requiring repair or regenerate parts of their body is a subject of great interest because of the solutions that can provide for a better quality of life. However, technical issues and biological materials or cells are remarkable and, before applying those biomaterials to patients, preclinical models should be analyzed to solve the limitations of cell viability, mechanical strength (from the moment they are introduced into the body until they are replaced by new tissue), and also the biological adaptation in the organism. The manufacture of spare parts for the human body, by traditional methods or using tissue engineering or cell therapy, are currently challenges are of great importance in biomedical research. In this talk those ideas will be properly addressed. Bioceramics with clinical applications.Edited by M.Vallet-Regí John Wiley and Sons Ltd. United Kingdon. 2014 Biomedical applications of mesoporous ceramics: drug delivery, smart materials and bone tissue engineering.Edited by M.Vallet-Regí, M. Manzano, M. Colilla. CRC Press. 2013. I. Izquierdo, A.J. Salinas, M. Vallet-Regí. Int. J. Appl. Glass Sci.. 4, 149-161 2013 S. Sánchez-Salcedo, M. Colilla, I. Izquierdo and M. Vallet-Regí J. Mater. Chem. B, 1, 1595-1606 2013. M. Colilla, B. González, M. Vallet-Regí. Biomater. Sci. 1, 114–134 2013 A. Salinas, P. Esbrit, M. Vallet-Regí. Biomater. Sci. 1, 40-51 2013. D. Arcos, M. Vallet-Regí. Acta Materialia. 61, 890-911 2013. J. Simchenn, A. Baeza, D. Ruiz, M. Esplandiu, M. Vallet-Regí.. Small. 8(13), 2053-2059 2012. M. Vallet-Regí, International Scholarly Research Network ISRN Materials Science, Volume 2012, Article ID 608548, 20 pages, doi:10.5402/2012/608548 A. Baeza, E. Guisasola, E. Ruiz-Hernández and M. Vallet-Regí. Chem. Mater. 24, 517-524 2012. M. Manzano, M. Vallet-Regí. Prog. Solid State Ch. 40, 17-30 2012. A. Baeza, E. Guisasola, E. Ruiz-Hernández and M. Vallet-Regí. Chem. Mater. 24, 517-524 2012. M Vallet-Regí and E. Ruiz-Hernández. Adv. Mater. 23, 5177–5218. 2011 M. Vallet-Regí, M. Colilla and B. González. Chem. Soc. Rev. 70, 596-607 2011 E. Ruiz-Hernández, A. Baeza, M. Vallet-Regí. ACS Nano. 5 (2), 1259–1266 2011. M. Vallet-Regí, E. Ruiz-Hernández, B. González, A. Baeza J. Biomater. Tissue. Eng. 1, 6-29 2011. Materials Science and the development of industrial applications, latest examples related to Rare Earths P. MAESTRO1,* T. LE-MERCIER2,*, V. BUISSETTE2,* 1 SOLVAY, Scientific Director, 178 Ave Albert Schweitzer, 33600, Pessac, France 2 SOLVAY, Centre de Recherches, 52 Rue de la Haie-Coq, 93308, Aubervilliers, France * Corresponding author: [email protected] Rare earths industry is strongly dependent on its capacity to develop innovative applications based on the very specific physical properties these elements exhibit, but also on the differentiation that synthesis can bring, through the control of morphology, or reactivity of the products. As a matter of fact, solid state chemistry has played a key role in inventing new phases capable of delivering specific physical and chemical properties, like in luminescent materials catalysts systems, magnets, etc.. But in addition to the relationship between structure and property, real applications often depend on the capacity of the product to deliver performance through the mastering, through the synthesis capabilities, and the control of particle size, phases distribution, surface reactivity, … Examples will be given on how we have taken into account the importance of coupling structural aspects to materials science and inorganic synthesis, for the development of, for example, new phosphors with low terbium content, or new powders for fine polishing, by combining benchmark synthesis capabilities and thorough understanding of the mechanisms relating the composition of the products and its performance Investigation of thermopower in transition metal oxides and related sulfides and selenides Sylvie Hébert Laboratoire CRISMAT, UMR6508 CNRS et ENSICAEN, 6 Bd du Maréchal Juin 14050 CAEN Cedex, France *[email protected] The Seebeck coefficient is a powerful probe of the electronic properties of a material as it is very sensitive to the nature of carriers, to the band structure of the materials and to the different diffusion processes and transport mechanisms. It can also be very sensitive to the presence of electronic correlations, as for example in oxides [1]. Moreover, the Seebeck effect can be used to generate electricity from waste heat, and has been more and more investigated in the recent years with the aim of finding new efficient thermoelectric materials. In this talk, I will show results we have obtained in oxides with different crystallographic structures, with corner shared octahedra (perovskites) or edge shared octahedra (misfits and hollandites), to show the peculiarities of Seebeck coefficient observed for each structure, and emphasize the role of spin and orbital degeneracies associated to the transition metal cation (Co, Ru…) on thermopower [2]. For thermoelectric applications, the three important quantities to optimize are the Seebeck coefficient 2 S, the electrical resistivity ρ and the thermal conductivity κ, and the ZT value (ZT = S T/(ρκ)) shoud be close to 1. Even if some ZT close to 1 have already been reported, the best ZT are close to 0.4 – 0.5 at ~ 1000K for oxides, and the major limiting factor is the too large electrical resistivity. By increasing covalency, better conductivities are obtained in sulfides and selenides [3] and we will show that for similar structures with edge shared octahedra, sulfides and selenides can also present interesting thermoelectric properties [4]. Referencias [1] J. Merino et al., PRB61, 7996 (2000) ; K. Behnia et al., JPMC16, 5187 (2004). [2] S. Hébert et al., PSSA210, 69 (2013). [3] K. Koumoto et al., J. American Ceramic Soc. 96, 1 (2013). [4] H. Takahashi et al., Chem. Mater. 25, 1809 (2013). Cartography of the Van der Waals Territory Santiago Alvarez Departament de Química Inorgànica and Institut de Química Teòrica i Computacional Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona A cartography of the intermolecular distance region between two elements provides a perspective view of the bonding – non bonding duality, and allowed to extract a new consistent set of van der Waals radii for most naturally occuring elements. For the case of transition metal centers with loosely bound ligands and ill-defined coordination spheres that populate the lawless frontiers between bonds and van der Waals contacts, a contiuous shape measures approach allows us to tackle the problem of precisely defining the stereochemistry of the coordination sphere. Finally, coordination ability indices for solvents and anions towards transition metals or lanthanides have been deduced based on the frequency with which they appear as coordinated, semicoordinated or uncoordinated species in crystal structures. References S. Alvarez. "A Cartography of the Van der Waals Territory", Dalton Trans. 2013, 42, 8617. A. Ruiz-Martínez et al. "Ligand Association/Dissociation Paths and Ill Defined Coordination Numbers", Chem. Eur. J. 2010, 16, 6567. R. Díaz-Torres, S. Alvarez. "Coordinating Ability of Anions and Solvents Towards Transition Metals and Lanthanides", Dalton Trans. 2011, 40, 10742. Persistent luminescence of the ZnGa2O4:Cr nanophosphors for in-vivo bio-imaging Bruno Viana Institut de Recherche de Chimie Paris, CNRS Chimie ParisTech, 11 rue Pierre et Marie Curie, 75005 Paris, France Abstract : 3+ ZnGa2O4 (ZGO) is a normal spinel. When doped with Cr ions, ZGO:Cr becomes a high brightness persistent luminescence material with an emission spectrum perfectly matching the transparency window of living tissues. It allows in vivo mouse imaging with a better signal to background ratio than classical fluorescent near infrared probes. One of the most interesting characteristic of ZGO:Cr lies in the fact that its persistent luminescence can be excited with orange/red light, well below its band gap energy and well in the transparency window of living tissues. A mechanism based on the trapping of carriers localized around a special type of Cr3+ ions can explain this singularity. Optical imaging of vascularization, tumors and grafted cells can therefore be realized. Mª Pilar Alonso Abad VIII Encuentro franco-español de Qca. y Fca. del estado sólido Universidad de Burgos 2-4-Abril-2014 El Patrimonio vidriero del Real Monasterio de Las Huelgas de Burgos: Patrimonio, Conservación y Caracterización EL PATRIMONIO VIDRIERO DEL REAL MONASTERIO DE LAS HUELGAS DE BURGOS: PATRIMONIO, CONSERVACIÒN Y CARACTERIZACIÓN Mª Pilar Alonso Abad Universidad de Burgos Resumen La vidriera es un arte del fuego muy versátil, simbólico y doctrinal. En la Historia ha disfrutado de momentos de mayor y menor desarrollo en los que se ha podido descubrir la riqueza productiva y la constante experimentación en sus materiales y composición. Fue precisamente durante
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