09 خرداد 1403
محمود ناصري

محمود ناصری

مرتبه علمی: دانشیار
نشانی:
تحصیلات: دکترای تخصصی / فیزیک-نانو
تلفن: 08132355404
دانشکده: دانشکده علوم پایه

مشخصات پژوهش

عنوان
The roles of polymer in fabrication of cobalt ferrite nanoparticles prepared by thermal treatment method
نوع پژوهش مقاله ارائه شده
کلیدواژه‌ها
Nanoparticles; Cobalt ferrite; Poly(vinyl pyrrolidone); Magnetic properties; Thermal treatment
سال
2012
پژوهشگران محمود ناصری

چکیده

Cobalt ferrite nanocrystals were prepared from an aqueous solution containing metal nitrates and various of concentrations of poly(vinyl pyrrolidone). To stabilize the particles, they were thermally treated at 823 K as an optimum calcination temperature. The presence of the crystalline phase in each sample was confirmed by X-ray diffraction (XRD) analysis that showed that the presence of the PVP increased the degree of crystallinity of the nanoparticles that were formed. The average particle size and the morphology of the cobalt ferrite nanoparticles were determined by transmission electron microscopy (TEM), and these parameters were found to differ with the various concentrations of PVP. Fourier transform infrared spectroscopy (FT-IR) confirmed the presence of metal oxide bands for all of the PVP concentrations and confirmed the absence of organic bands for PVP concentrations less than 0.055 gm/ml.