Radio frequency plasma assisted surface modification of Fe3O4 nanoparticles using polyaniline/polypyrrole for bioimaging and magnetic hyperthermia applications
Beena Mol, Ansar Ereath Beeran, Prasad S. Jayaram, Prabha Prakash, Ramapurath S. Jayasree, Senoy Thomas, P. S. Baby Chakrapani, M. R. Anantharaman, M. Junaid Bushiri
Abstract
Abstract Surface modification of superparamagnetic Fe 3 O 4 nanoparticles using polymers (polyaniline/polypyrrole) was done by radio frequency (r.f.) plasma polymerization technique and characterized by XRD, TEM, TG/DTA and VSM. Surface-passivated Fe 3 O 4 nanoparticles with polymers were having spherical/rod-shaped structures with superparamagnetic properties. Broad visible photoluminescence emission bands were observed at 445 and 580 nm for polyaniline-coated Fe 3 O 4 and at 488 nm for polypyrrole-coated Fe 3 O 4 . These samples exhibit good fluorescence emissions with L929 cellular assay and were non-toxic. Magnetic hyperthermia response of Fe 3 O 4 and polymer (polyaniline/polypyrrole)-coated Fe 3 O 4 was evaluated and all the samples exhibit hyperthermia activity in the range of 42–45 °C. Specific loss power (SLP) values of polyaniline and polypyrrole-coated Fe 3 O 4 nanoparticles (5 and 10 mg/ml) exhibit a controlled heat generation with an increase in the magnetic field.