کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1521582 1511810 2015 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The formation of magnetic carboxymethyl-dextrane-coated iron-oxide nanoparticles using precipitation from an aqueous solution
ترجمه فارسی عنوان
شکل گیری نانوذرات آهن اکسیدهای کربوکسی متیل-دیاستارن مغناطیسی با استفاده از رسوب از یک محلول آبی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
چکیده انگلیسی
The formation of spinel iron-oxide nanoparticles during the co-precipitation of Fe3+/Fe2+ ions from an aqueous solution in the presence of carboxymethyldextrane (CMD) was studied. To follow the formation of the nanoparticles, a mixture of the Fe ions, CMD and ammonia was heated to different temperatures, while the samples were taken, quenched in liquid nitrogen, freeze-dried and characterized using transmission electron microscopy (TEM), X-ray diffractometry (XRD) and magnetometry. The CMD plays a role in the reactions of the Fe ions' precipitation by partially immobilizing the Fe3+ ions into a complex. At room temperature, the amorphous material is precipitated. Then, above approximately 30 °C, the spinel nanoparticles form inside the amorphous matrix, and at approximately 40 °C the matrix decomposes into the suspension of carboxymethyl-dextrane-coated iron-oxide nanoparticles. The CMD bonded to the nanoparticles' surfaces hinders the mass transport and thus prevents their growth.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Chemistry and Physics - Volume 153, 1 March 2015, Pages 376-383
نویسندگان
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