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Fibers comprising the hydrophilic polymer polyvinylpyrrolidone K90, cetyltrimethylammonium bromide, tetraethyl orthosilicate and Fe 3 O 4 were fabricated using an electrospinning process. Silica coated magnetite (Fe 3 O 4 @SiO 2 ) core-shell nanoparticles (NPs) with high magnetic sensitivity were spontaneously formed through molecular self-assembly when the...
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