Preparation and characterization of SPION functionalized via caffeic acid
作者： A Baykal , Md Amir , S Günerb , H Sözeri , None
DOI: 10.1016/J.JMMM.2015.07.095
关键词:
摘要: Abstract Caffeic acid coated superparamagnetic iron oxide nanoparticles (SPION-CFA) was synthesized by reflux method. The structural, spectroscopic and magnetic properties were studied X-ray diffraction (XRD), Transmission electron microscopy (TEM), Scanning (SEM), Vibrating sample magnetometer (VSM) techniques. Thermal gravimetric analysis (TG) Fourier transform infrared spectroscopy (FT-IR) confirmed the presence of CA on surface SPION. theoretical analyzes performed recorded room temperature VSM spectrum formation nature SPION-CFA. particle size dependent Langevin function applied to determine average dimension ( D mag ) around 11.93 nm. In accordance, crystallite sizes obtained as 11.40 nm ~12.00 nm from XRD TEM measurements. extrapolated specific saturation magnetization σ s is 44.11 emu/g measured moment 1.83 µ B . These parameters assign small order for NPs with respect bulk Fe 3 O 4 Magnetic anisotropy offered uniaxial calculated effective constant K eff 34.82×10 Erg/g. size-dependent suggests existence a magnetically inactive layer 1.035 nm
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