Anisotropically structured magnetic aerogel monoliths

Autor:	Marta Jole Ildelfonsa Airaghi Leccardi, Martin J. Süess, Florian J. Heiligtag, Markus Niederberger, Derya Erdem
Rok vydání:	2014
Předmět:	Materials science visual_art visual_art.visual_art_medium General Materials Science Aerogel Nanotechnology Texture (crystalline) Ceramic Porosity Anisotropy Chemical reaction Nanoscopic scale Magnetic field
Zdroj:	Nanoscale. 6:13213-13221
ISSN:	2040-3372 2040-3364
Popis:	Texturing of magnetic ceramics and composites by aligning and fixing of colloidal particles in a magnetic field is a powerful strategy to induce anisotropic chemical, physical and especially mechanical properties into bulk materials. If porosity could be introduced, anisotropically structured magnetic materials would be the perfect supports for magnetic separations in biotechnology or for magnetic field-assisted chemical reactions. Aerogels, combining high porosity with nanoscale structural features, offer an exceptionally large surface area, but they are difficult to magnetically texture. Here we present the preparation of anatase-magnetite aerogel monoliths via the assembly of preformed nanocrystallites. Different approaches are proposed to produce macroscopic bodies with gradient-like magnetic segmentation or with strongly anisotropic magnetic texture.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::178ce3489dd681ad455a2cfa54d0fdda https://doi.org/10.1039/c4nr04694c Zobrazit plný text záznamu