کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
11026348 1666395 2019 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Estimating saturation magnetization of superparamagnetic nanoparticles in liquid phase
ترجمه فارسی عنوان
تخمین ذرات اشباع مغناطیسی نانوذرات ابرپارا مغناطیسی در فاز مایع
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
چکیده انگلیسی
Superparamagnetic nanoparticles (SPMNPs), with unique physical and magnetic properties that differentiate them from their bulk magnetic materials, have been widely studied for potential applications in biomedical areas. With proper surface chemical functionalization, SPMNPs have found their applications in magnetic hyperthermia therapy, magnetic bioassays, drug delivery, magnetic manipulation, etc. These applications require elaborate tuning of the physical and magnetic properties of the SPMNPs such as saturation magnetization Ms and magnetic core size D. In this work, we present a search coil-based method to directly characterize the Ms of SPMNPs in the liquid phase. The nonlinear magnetic responses of SPMNPs under oscillating magnetic fields are exploited and the induced harmonic signals are used to analyze their Ms and D. Different combinations of Ms and D are assumed and their harmonic ratios R are summarized. Curve fitting shows that the harmonic ratio R=0.74+2.85×109∙D-4.41∙Ms-1.44, with the coefficient of determination R-square = 0.98.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 471, 1 February 2019, Pages 394-399
نویسندگان
, , , ,