Magnetic and spectroscopic properties of Polyacrylamide-CoFe2O4 magnetic hydrogel


Alveroglu E., SOZERI H., Kurtan U., Senel M., Baykal A.

JOURNAL OF MOLECULAR STRUCTURE, vol.1036, pp.386-391, 2013 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 1036
  • Publication Date: 2013
  • Doi Number: 10.1016/j.molstruc.2012.12.009
  • Journal Name: JOURNAL OF MOLECULAR STRUCTURE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.386-391
  • Istanbul Technical University Affiliated: Yes

Abstract

This study investigates synthesis and characterization of polyacrylamide (PAAm) hydrogels containing ferromagnetic CoFe2O4 nanoparticles. Structural, electrical, and magnetic characterization of the gels have been performed with X-ray powder diffractometry, Scanning electron microscopy, DC conductivity, magnetization and fluorescence spectroscopy techniques. Fluorescence and electrical measurements show that nanoparticles have trapped in the gel so they cannot move through the gel even if the gel is swollen and the voltage is applied. Pyranine molecules diffuse easily through the gel due to the presence of ferromagnetic nanoparticles. As number of diffused pyranine molecules increases current densities of the magnetic hydrogel increase. Magnetization measurements reveal that CoFe2O4 nanoparticles do not diffuse out of the gel during swelling. As a result, total magnetization of the gel do not change as volume of the gel increases. (C) 2012 Elsevier B.V. All rights reserved.