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Reversible Adsorption of Methylene Blue as Cationic Model Cargo onto Polyzwitterionic Magnetic Nanoparticles
Author(s) -
Biehl Philip,
von der Lühe Moritz,
Schacher Felix H.
Publication year - 2018
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201800017
Subject(s) - adsorption , cationic polymerization , methylene blue , zeta potential , thermogravimetric analysis , dynamic light scattering , context (archaeology) , nanoparticle , materials science , desorption , surface charge , chemical engineering , transmission electron microscopy , chemistry , polymer chemistry , nanotechnology , photocatalysis , organic chemistry , catalysis , paleontology , engineering , biology
The reversible electrostatic adsorption of the cationic dye methylene blue (MB) as a model compound to polydehydroalanine (PDha)‐coated magnetic multicore nanoparticles (MCNP) is presented. The pH responsiveness of the zwitterionic coating material enables reversible switching of the net surface charge of the PDha@MCNP hybrid particles by changes in pH and thus allows reversible adsorption of MB at neutral pH and desorption at low pH values. The resulting hybrid materials can be very interesting systems in the context of water purification, and the reversible adsorption is studied using UV–vis spectroscopy under varying surrounding conditions. The particles are characterized using dynamic light scattering, zeta potential measurements, transmission electron microscopy, and thermogravimetric analysis.