Functionalization of magnetic nanowires by charged biopolymers.
(2008) Biomacromolecules — Vol. 9, n° 9, p. 2517-2522 (2008)
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- Abstract
- We report on a facile method for the preparation of biocompatible and bioactive magnetic nanowires. The method consists of the direct deposition of polysaccharides by layer-by-layer (LbL) assembly onto a brush of metallic nanowires obtained by electrodeposition of the metal within the nanopores of an alumina template supported on a silicon wafer. Carboxymethylpullulan (CMP) and chitosan (CHI) multilayers were grown on brushes of Ni nanowires; subsequent grafting of an enzyme was performed by conjugating free amine side groups of chitosan with carboxylic groups of the enzyme. The nanowires are finally released by a gentle ultrasonic treatment. Transmission electron microscopy, electron energy-dispersive loss spectroscopy, and x-ray photoelectron spectroscopy indicate the formation of an homogeneous coating onto the nickel nanowires when one, two, or three CMP/CHI bilayers are deposited. This easy and efficient route to the biochemical functionalization of magnetic nanowires could find widespread use for the preparation of a broad range of nanowires with tailored surface properties.
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Magnin, D., Callegari, V., Mátéfi-Tempfli, S., Mátéfi-Tempfli, M.-R., Glinel, K., Jonas, A., & Demoustier, S. (2008). Functionalization of magnetic nanowires by charged biopolymers. Biomacromolecules, 9(9), 2517-2522. https://doi.org/10.1021/bm8005402 (Original work published 2008)