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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
chemical engineering
Making flexible magnetic aerogels and stiff magnetic nanopaper using cellulose nanofibrils as templates
Nature Nanotechnology, Volume 5, No. 8, Year 2010
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Description
Nanostructured biological materials inspire the creation of materials with tunable mechanical properties. Strong cellulose nanofibrils derived from bacteria or wood can form ductile or tough networks that are suitable as functional materials. Here, we show that freeze-dried bacterial cellulose nanofibril aerogels can be used as templates for making lightweight porous magnetic aerogels, which can be compacted into a stiff magnetic nanopaper. The 20-70-nm-thick cellulose nanofibrils act as templates for the non-agglomerated growth of ferromagnetic cobalt ferrite nanoparticles (diameter, 40-120nm). Unlike solvent-swollen gels and ferrogels, our magnetic aerogel is dry, lightweight, porous (98%), flexible, and can be actuated by a small household magnet. Moreover, it can absorb water and release it upon compression. Owing to their flexibility, high porosity and surface area, these aerogels are expected to be useful in microfluidics devices and as electronic actuators. © 2010 Macmillan Publishers Limited. All rights reserved.
Authors & Co-Authors
Olsson, Richard Tobias
Sweden, Stockholm
The Royal Institute of Technology Kth
Azizi Samir, M. A.S.
Sweden, Stockholm
The Royal Institute of Technology Kth
Morocco
Nanocomposites and Bioconcepts S.a.r.l.
Salazar-Alvarez, German
Sweden, Stockholm
The Royal Institute of Technology Kth
Spain, Cerdanyola Del Valles
Universitat Autònoma de Barcelona
Sweden, Stockholm
Arrhenius Laboratory
Belova, Lyubov
Sweden, Stockholm
The Royal Institute of Technology Kth
Ström, Valter
Sweden, Stockholm
The Royal Institute of Technology Kth
Berglund, Lars A.
Sweden, Stockholm
The Royal Institute of Technology Kth
Ikkala, Olli T.
Finland, Espoo
Aalto University
Nogués, J.
Spain, Cerdanyola Del Valles
Universitat Autònoma de Barcelona
Gedde, Ulf Wiel
Sweden, Stockholm
The Royal Institute of Technology Kth
Statistics
Citations: 743
Authors: 9
Affiliations: 5
Identifiers
Doi:
10.1038/nnano.2010.155
ISSN:
17483387
e-ISSN:
17483395
Research Areas
Environmental