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ABSTRACTS Volume 4 vat. inc. € 30,00 SCIENTIFIC RESEARCH ABSTRACTS - 1st International Conference on Applied Mineralogy & Advanced Materials ABSTRACTS ScientificResearch International Conference International Volume 4 Volume 15 INTERNATIONAL CONFERENCE ON APPLIED MINERALOGY & ADVANCED MATERIALS Castellaneta Marina (Taranto), Italy June, 7-12, 2015 Scientific Research Abstracts Volume 4 Copyright © 2015 by the Authors. Published by Digilabs (Italy) under request of Associazione Italiana per lo Studio delle Argille - onlus. Selection by the Scientific Committee of AMAM 2015. The policy of Scientific Research Abstracts is to provide full access to the bibliographic contents if a correct citation to the original publication is given (rules as in CC 3.0). Therefore, the authors authorize to i) print the ab- stracts; ii) redistribute or republish (e.g., display in repositories, web platforms, etc.) the abstracts; iii) translate the abstracts; iv) reuse portions of the abstracts (text, data, tables, figures) in other publications (articles, book, etc.). International Conference on Applied Mineralogy & Advanced Materials - AMAM2015 Castellaneta Marina (Taranto), Italy, June 7-12, 2015 Organized by Italian Association for the Study of Clays (AISA - onlus) Institute of Methodologies for Environmental Analysis (IMAA) - CNR Scientific Research Abstracts - Volume 4 Editors: Claudia Belviso, Saverio Fiore ISBN: 978-88-7522-092-1 Publisher: Digilabs - Bari, Italy Cover: Digilabs - Bari, Italy Printed in Italy - Global Print s.r.l., Gorgonzola (MI), Italy Citations of abstracts in this volume should be referenced as follows: <Authors> (2015). <Title>. In: C. Belviso and S. Fiore (Editors). International Conference on Applied Mineralogy & Advanced Materials - AMAM 2015 Castellaneta Marina, Italy. Digilabs Pub., Bari, Italy, pp. 187, ISBN: 978-88-7522-092-1 PLENARY LECTURES Scientific Research Abstracts Vol. 4, p. 1, 2015 Applied Mineralogy & Advanced Materials - AMAM 2015 © Author(s) 2015. CC Attribution 3.0 License ADVANCED ECOMATERIALS BASED ON FUNCTIONAL CLAY NANOARCHITECTURES EDUARDO RUIZ-HITZKY Instituto de Ciencia de Materiales de Madrid, CSIC, Madrid, Spain [email protected] Clay minerals are exceptionally abundant and widely distributed raw materials in Nature. They have been used since antiquity in pottery and building elements as for instance adobe, bricks and tiles. Cur- rently, this natural resource attracts a great interest in view to prepare advanced nanostructured materials contributing at the same to reduce environmental impact. Clays, by themselves, and most of clay deriva- tives, are safe materials useful for multipurpose applications in strategic sectors ranging from energy storage to biomedical uses under nanotechnology approaches. Beside, the use of clay-based nanostruc- tured materials for detection and removal of pollutants from air, water and soils is becoming a topic of increasing research activity. Functional nanoarchitectures based on silicate clays of different composition and structure, showing layered, tubular or fibrous morphologies, have been designed in view to applications as adsorbents, cata- lysts, membranes, gas-barriers, polymer-clay nanocomposites, electrical and electrochemical devices, photoactive systems or even as additives for vaccines and non-viral vectors for gene delivery and trans- fection of last generation. Assuming that advanced technologies will require in a near future the use of low cost, widely distributed and no-pollutant resources such as clays and other abundant raw ecomateri- als, recent examples of advanced materials based on smectite type, such as montmorillonite, or prepared from fibrous clays such as sepiolite, will be introduced and discussed here. It will be shown, for instance, applications on materials based on clays as superparamagnetic adsorbents, supported graphenes and materials for biomedical purposes, which have been developed in our laboratory in recent past years. Darder M., González-Alfaro Y., Aranda P., Ruiz-Hitzky E. (2014). Silicate-based multifunctional nanostructured materials with magnetite and Prussian blue: application to cesium uptake, RSC Adv. 4, 35415-35421. González-Alfaro Y., Aranda P., Fernandes F.M., Wicklein B., Darder M., Ruiz-Hitzky E. (2011). Multifunctional Porous Materials Through Ferrofluids. Adv. Mater., 23, 5224-5228. Koriche Y., Darder M., Aranda P., Semsari S., Ruiz-Hitzky E. (2014). Bionanocomposites based on layered silicates and cationic starch as eco- friendly adsorbents for hexavalent chromium removal. Dalton Trans. 43, 10512-10520. Ruiz-García C., Darder M., Aranda P., Ruiz-Hitzky E. (2014). Toward a green way for the chemical production of supported graphenes. J. Mater. Chem. A, 2, 2009-2017. Ruiz-Hitzky E., Aranda P. (2014). Novel architectures in porous materials based on clays. J. Sol-Gel Sci. Technol. 70, 307-316. Ruiz-Hitzky E., Aranda P., Darder M., Ogawa M. (2011). Hybrid and biohybrid silicate based materials: molecular versus block-assembling bottom-up processes. Chem. Soc. Rev., 40, 801-828. Ruiz-Hitzky E., Aranda P., Darder M., Rytwo G. (2010). Hybrid materials based on clays for environmental and biomedical applications. J. Mater. Chem. 20, 9306-9321. Ruiz-Hitzky E., Darder M., Aranda P., Martín del Burgo M.A., del Real G. (2009). Virus-bionanocomposite materials: application for flu vac- cines. Adv. Mater., 21, 4167-4171. Ruiz-Hitzky E., Darder M., Fernandes F.M., Wicklein B., Alcântara A.C.S., Aranda P. (2013). Fibrous clays based bionanocomposites. Prog. Polym. Sci., 38, 1392-1414. Ruiz-Hitzky E., Darder M., Fernandes F.M., Zatile E., Palomares F.J., Aranda P. (2011). Supported graphene from natural resources: easy preparation and applications. Adv. Mater., 23, 5250-5255. Scientific Research Abstracts Vol. 4, p. 2, 2015 Applied Mineralogy & Advanced Materials - AMAM 2015 © Author(s) 2015. CC Attribution 3.0 License ENGINEERING OF MAGNETIC PROPerties OF AMORPHOUS AND nanocrytalline MICROWIRES ARCADY ZHUKOV*(1,2,3), MIHAIL IPATOV (1,2), AHMED TALAAT (1,2), JUAN M. BLANCO (2), VALENTINA ZHUKOVA (1,2) (1) Dpto. de Fís. Mater., Basque Country Univesity, San Sebastián, Spain, (2) Dpto. de Física Aplicada, EUPDS, Basque Country Univesity San Sebastian, Spain, (3) IKERBASQUE, Basque Foundation for Science, Bilbao, Spain Amorphous and nanocrystalline thin ferromagnetic microwires (typically of 1-30 mm in diameter) have attracted growing attention in the last few years owing to excellent magnetic properties, fast domain wall dynamics and Giant Magnetoimpedance, GMI, effect [1,2]. The principal advantages of these materials are unexpensive fabrication method allowing preparation of long and continuous microwires. Moreover these microwires can exhibit either unusual and extremely good soft magnetic properties and GMI effect interesting basically for applications for low magnetic field detection or extremely fast domain wall propa- gation suitable for magnetic memories or logics [3]. Generally soft magnetic properties of amorphous ferromagnetic microwires are affected by the magneto- elastic energy related to the presence of glass coating. Spontaneous magnetic bistability and fast domain walls, DW, propagation are reported for microwires with positive magnetostriction constant exhibiting rectangular hysteresis loops. GMI effect and best soft magnetic properties are usually reported in amor- phous microwires with vanishing magnetostriction constant [1,2, 4]. Aforementioned magnetoelastic en- ergy depending on magnetostriction constant, λs, as well as on stresses, σ (applied, σapp and internal, σi) affects both domain wall dynamics and GMI effect [2,5]. The magnetostriction constant depends mostly on the chemical composition of amorphous metallic alloy and is vanishing in amorphous Fe-Co based alloys with Co/Fe ≈70/5 [4]. The necessary condition for observation of fast DW propagation is the magnetic bistability typically ob- served in Fe-rich microwires with rectangular hysteresis loops [1]. On the other hand the condition for achievement of considerable GMI effect is high magnetic permeability usually observed in Co-rich mi- crowires with low and negative magnetostriction constant [2]. Consequently GMI effect and fast DW propagation related to magnetic bistability are two mutually exclusive features in the case of glass-coated microwires. Until now high GMI effect and fast DW dynamics simultaneously have not been observed. We demonstrate that in Co-rich amorphous microwires with vanishing magnetostriction coefficient con- ventional annealing is quite efficient method for tailoring of magnetic properties. We found the anneal- ing conditions at which we can observe induced magnetic bistability allowing observation of fast DW propagation and GMI effect simultaneously in the same sample. For interpretation of observed changes of hysteresis loops by annealing we consider stress dependence of the magnetostriction. For amorphous microwires with high magnetostriction coefficient most efficient methods of tailoring of magnetic properties are either stress (or magnetic field) annealing or nanocrystallization of amorphous mi- crowires. Stress annealing of glass-coated composite microwires results in re-distribution and even drastic decrease of the longitudinal stress component and even in the appearance of the compressive longitudinal stresses (so-called “back stresses”). Consequently very interesting magnetic behavior, i.e. stress impedance effect or extremely soft magnetic properties can be realized [5]. Finally, nanocrystallization allows obtaining of
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