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Synthesis of Responsive Polymer Brushes on Magnetic Nanoparticles

  • Kamlesh J. Suthar (a1), Joseph E. Mowat (a1) (a2), Shankar Balasubramanian (a3), Muralidhar K. Ghantasala (a2) and Derrick C. Mancini (a1)...

Abstract

We report a simple synthesis technique to attached poly(N-isopropylacrylamide) on magnetic nanoparticles. Fe3O4 magnetic nanoparticles were prepared using co-precipitation method. Nearly monodisperse nanoparticles were separated by terminating surface of Fe3O4 with dopamine followed by careful centrifugation and decantation. NHS/EDC coupling chemistry was employed to attached the carboxylic acid terminated poly(N-isopropylacrylamide) to amine end of dopamine on surface of the magnetic particles. Analysis of the polymer brush layers was conducted using UV-Vis spectroscopy, ATR−FTIR, and Transmission electron microscopy techniques. The magnetic property was investigated using direct current superconducting quantum interference device (DC-SQUID) method.

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