Figure 3From: Synthesis and characterization of core-shell Fe3O4-gold-chitosan nanostructureFTIR spectra of a) chitosan, b) crosslinked chitosan by aldehyde, c) chitosan-Fe 3 O 4 hydrogel nanocomposite (nanoparticles immobilized), d) Fe 3 O 4 nanoparticles only dispersed on the surface of hydrogel (nanoparticles not immobilized).Back to article page