ساخت نانوکامپوزیت هیدروکسی آپاتیت مغناطیسی و بررسی ویژگی‌های ساختاری و مغناطیسی آن

نوع مقاله : مقاله پژوهشی

نویسندگان

دانشگاه فردوسی مشهد

چکیده

هیدروکسی­آپاتیت (Ca10 (PO4)6 (OH)2) با ساختار بلوری ششگوشی تنها فاز معدنی قابل شناسایی استخوان است. در این پژوهش نانوکامپوزیت فریت منیزیم- هیدروکسی آپاتیت به منظور کاربردهای پزشکی ساخته شد. نخست، نانومیله‏های هیدروکسی آپاتیت متخلخل به روش هم­رسوبی با قالب میسلی ساخته شدند. عامل فعال سطحی غیریونی پلورونیک 123P < /span> به عنوان قالب میسلی مورد استفاده قرار گرفت. سپس، نانوکامپوزیت فریت منیزیم- هیدروکسی آپاتیت با روش سونوشیمی ساخته شد. ساختار بلوری نانوپودرها به وسیله الگوی پراش پرتو ایکس تعیین گردید. همچنین ریخت­شناسی نمونه‌ها توسط میکروسکوپ الکترونی عبوری بررسی شد. در تصاویر میکروسکوپ الکترونی عبوری نانوکامپوزیت، نانوذرات فریت منیزیم به شکل کره‏هایی با قطر تقریبی nm 8 روی سطح نانومیله‏های هیدروکسی آپاتیت مشاهده شدند. حلقه‏های پسماند (M- H) نانوذرات فریت منیزیم و نانوکامپوزیت فریت منیزیم- هیدروکسی آپاتیت، در دمای اتاق، به وسیله مغناطیس‏سنج با نمونه ارتعاشی اندازه‏گیری شدند. نتایج اندازه‏گیری‏ها بیانگر رفتار ابرپارامغناطیس نانوساختارهای تولید شده است.    

کلیدواژه‌ها


عنوان مقاله [English]

Synthesis of magnetic hydroxyapatite nanocomposites and investigation of its structural and magnetic properties

چکیده [English]

: Hydroxyapatite (Ca10(PO4)6(OH)2) with the hexagonal crystal structure is the only identifiable mineral phase of bone. In this work, magnesium ferrite-hydroxyapatite nanocomposites were synthesized for the purpose of medical applications. The first step of this work is the synthesis of mesoporous hydroxyapatite nanorods via co-precipitation method in combination with micelles template. Non-ionic surfactant Pluronic P123 was used as a micelles template. At the second step, magnesium ferrite-hydroxyapatite nanocomposites were synthesized by the sonochemical method. The crystal structure of nanopowders was determined using X-ray diffraction pattern. Transmission electron microscopy was also applied for the morphology of the samples. From TEM image of the nanocomposite, it was observed that magnesium ferrite nanopaticles have spherical shape with diameter of about 8 nm on the surface of hydroxyapatite nanorods. Hysteresis loops (M-H) of magnesium ferrite nanoparticles and magnesium ferrite-hydroxyapatite nanocomposites were measured at room temperature by a vibrating sample magnetometer. The results revealed the superparamagnetic behavior of the produced nanostructures.

کلیدواژه‌ها [English]

  • Hydroxyapatite
  • magnesium ferrite
  • nanorods
  • nanocomposite
  • superparamagnetic
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