| Summary: | CoFe2O4 nanopraticles were successfully synthesized by using coprecipitation method from materials of CoCl2.6H2O and FeCl3.6H2O with the addition of NaOH. This methods has not given a uniform particle size therefore the addition of polyethylene glycol (PEG-4000) as a template is required. Bonding analysis is one of method to analyze the surface modification of CoFe2O4 using PEG-4000. Bonding analysis were investigated by mass comparation CoFe2O4 and PEG-4000 1:1, 2:1, 3:1, 1:2, 1:3, and 1:4. According, to the result of XRD, CoFe2O4 with the addition of PEG-4000 nanoparticle size of will be bigger than the CoFe2O4 without PEG-4000. Based on the result of Fourier Transform Infra-Red Spectroscopy analysis of the acquisition of new peaks indicating that the coating CoFe2O4 with PEG-4000 has been successfully carried out.
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