Magnetic nanocomposite aerogels

Corrias, A. and Loche, D. and Casula, M.F. (2011) Magnetic nanocomposite aerogels. In: MRS Fall meeting, Boston, MA. (doi:https://doi.org/10.1557/opl.2011.92) (The full text of this publication is not currently available from this repository. You may be able to access a copy if URLs are provided)

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Abstract

Aerogels are regarded as ideal candidates for the design of functional nanocomposites containing supported metal or metal oxide nanoparticles. The large specific surface area together with the open pore structure enables aerogels to effectively host finely dispersed nanoparticles up to the desired loading, to provide nanoparticle accessibility and/or to prevent nanoparticle agglomeration, as required to supply their specific functionalities. The preparation of highly porous nanocomposite aerogels containing magnetic metal, alloy or metal oxide nanoparticles dispersed into amorphous silica, with high purity and homogeneity, was successfully achieved by a novel sol-gel procedure involving urea-assisted co-gelation of the precursor phases. This method allows fast gelation, giving rise to aerogels with 97% porosity, and it is very versatile allowing to vary composition, loading and average size of the nanoparticles. The characterization of the morphological and structural features of the nanocomposite aerogels is carried out using different techniques, such as X-ray diffraction, Transmission Electron Microscopy and X-ray Absorption Spectroscopy. The characterization of the magnetic properties is carried out by SQUID magnetometry. © 2011 Materials Research Society.

Item Type: Conference or workshop item (Proceeding)
Additional information: Unmapped bibliographic data: LA - English [Field not mapped to EPrints] J2 - Mater Res Soc Symp Proc [Field not mapped to EPrints] AD - Dipartimento di Scienze Chimiche, INSTM, Universitá di Cagliari, S.S. 554 bivio per Sestu, 09042 Monserrato (Cagliari), Italy [Field not mapped to EPrints] DB - Scopus [Field not mapped to EPrints] C3 - Materials Research Society Symposium Proceedings [Field not mapped to EPrints]
Uncontrolled keywords: Amorphous silica, Average size, Functional nanocomposites, High purity, Magnetic metals, Magnetic nanocomposites, Metal oxide nanoparticles, Precursor phasis, Sol-gel procedure, SQUID magnetometry, Structural feature, Supported metals, Aerogels, Coagulation, Gelation, Loading, Magnetic properties, Metal nanoparticles, Metallic compounds, Nanocomposites, Silica, Sol-gels, Transmission electron microscopy, Urea, X ray absorption spectroscopy, X ray diffraction, Nanomagnetics
Subjects: Q Science > QC Physics > QC176.8.N35 Nanoscience, nanotechnology
Divisions: Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User: Anna Corrias
Date Deposited: 16 Dec 2014 14:01 UTC
Last Modified: 04 Dec 2017 17:45 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/46166 (The current URI for this page, for reference purposes)
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