Journal article
Controlling nanoparticle location via confined assembly in electrospun block copolymer nanofibers
Small (Weinheim an der Bergstrasse, Germany), v 4(11), pp 2067-2073
Nov 2008
PMID: 18932189
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Coaxial nanofibers with poly(styrene-block-isoprene) (PS-b-PI)/magnetite nanoparticles as core and silica as shell are fabricated using electrospinning.1-4 Thermally stable silica helps to anneal the fibers above the glass transition temperature of PS-b-PI and form ordered nanocomposite morphologies. Monodisperse magnetite nanoparticles (NPs; 4 nm) are synthesized and surface coated with oleic acid to provide marginal selectivity towards an isoprene domain. When 4 wt% nanoparticles are added to symmetric PS-b-PI, transmission electron microscopy (TEM) images of microtomed electrospun fibers reveal that NPs are uniformly dispersed only in the PI domain, and that the confined lamellar assembly in the form of alternate concentric rings of PS and PI is preserved. For 10 wt% NPs, a morphology transition is seen from concentric rings to a co-continuous phase with NPs again uniformly dispersed in the PI domains. No aggregates or loss of PI selectivity is found in spite of interparticle attraction. Magnetic properties are measured using a superconducting quantum interference device (SQUID) magnetometer and all nanocomposite fiber samples exhibit superparamagnetic behavior.
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Details
- Title
- Controlling nanoparticle location via confined assembly in electrospun block copolymer nanofibers
- Creators
- Vibha Kalra - School of Chemical and Biomolecular Engineering, Cornell University, Ithaca, NY 14853, USAJinwoo LeeJung Hun LeeSeung Goo LeeManuel MarquezUlrich WiesnerYong Lak Joo
- Publication Details
- Small (Weinheim an der Bergstrasse, Germany), v 4(11), pp 2067-2073
- Publisher
- Wiley; Germany
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Chemical and Biological Engineering
- Web of Science ID
- WOS:000261230400031
- Scopus ID
- 2-s2.0-55849131033
- Other Identifier
- 991014878090304721
UN Sustainable Development Goals (SDGs)
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InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Multidisciplinary
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology
- Physics, Applied
- Physics, Condensed Matter