Thermally-drawn fibers with spatially-selective porous domains
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s41467-017-00375-0.pdf
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Author(s)
Grena, Benjamin Jean-Baptiste
Alayrac, Jean-Baptiste
Levy, Etgar Claude
Stolyarov, Alexander M.
Joannopoulos, John
Fink, Yoel
Date Issued
August 2017
Journal
Nature Communications
Publisher
Nature Publishing Group
Citation
Grena, Benjamin et al. “Thermally-Drawn Fibers with Spatially-Selective Porous Domains.” Nature Communications 8, 1 (August 2017): 364 © 2017 The Author(s)
Version
Final published version
Abstract
The control of mass transport using porous fibers is ubiquitous, with applications ranging from filtration to catalysis. Yet, to date, porous fibers have been made of single materials in simple geometries, with limited function. Here we report the fabrication and characterization of thermally drawn multimaterial fibers encompassing internal porous domains alongside non-porous insulating and conductive materials, in highly controlled device geometries. Our approach utilizes phase separation of a polymer solution during the preform-to-fiber drawing process, generating porosity as the fiber is drawn. Engineering the preform structure grants control over the geometry and materials architecture of the final porous fibers. Electrical conductivity of the selectrolyte-filled porous domains is substantiated through ionic conductivity measurements using electrodes thermally drawn in the cross-section. Pore size tunability between 500 nm-10 μm is established by regulating the phase separation kinetics. We further demonstrate capillary breakup of cylindrical porous structures porous microspheres within the fiber core.
MIT Department
Massachusetts Institute of Technology. Institute for Soldier Nanotechnologies
Lincoln Laboratory
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Research Laboratory of Electronics
Terms of Use
Creative Commons Attribution 4.0 International License
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DOI of Published Version
https://doi.org/10.1038/S41467-017-00375-0
