Các hạt nano từ lõi - vỏ CoFe2O4/Fe3O4 cho đốt nóng cảm ứng hiệu quả

Mục đích của bài viết này thảo luận các tính chất từ và khả năng đốt nóng của các hạt nano lõi - vỏ CoFe2O4/Fe3O4 (NPs CS CF/FO). Từ độ bão hòa (MS) tăng và lực kháng (HC) từ giảm khi thể tích hay khối lượng pha FO trong NPs CS CF/FO tăng cũng như liên kết trao đổi từ cứng - từ mềm tốt hơn. | TNU Journal of Science and Technology 227 08 191 - 198 CORE-SHELL CoFe2O4 Fe3O4 MAGNETIC NANOPARTICLES FOR EFFICIENT INDUCTIVE HEATING Le Thi Hong Phong1 2 Pham Hong Nam1 Nguyen Van Dang3 Pham Thanh Phong4 Jozef Kovácˇ5 Ivan Skorvanek5 Do Hung Manh1 2 1Institute of Materials Science - VAST 2Graduate University of Science and Technology VAST 3TNU - University of Sciences 4Van Lang University 5Slovak Academy of Sciences Košice Slovakia ARTICLE INFO ABSTRACT Received 09 3 2022 The conversion of electromagnetic energy into heat by nanoparticles magnetic inductive heating has potential for biomedicine applications Revised 28 4 2022 such as drug release hyperthermia but low heating efficiency SAR has Published 11 5 2022 limited applications. Core-shell nanoparticles consisting of two soft-hard magnetic phases are of interest because the magnetic properties can be KEYWORDS controlled to achieve optimal SAR. However the relationship between structure magnetic properties and the SAR is difficult to predict. The Iron oxide aim of this study is to discuss the magnetic properties and the SAR of Cobalt ferrite core-shell CoFe2O4 Fe3O4 nanoparticles CS CF FO NPs . Saturation Magnetic nanoparticles magnetization increases and coercivity of decreases as the volume or mass of the FO phase in CS CF FO NPs increases as well as a better Superparamagnetism hard-soft magnetic exchange coupling. High SAR values are obtained Magnetic inductive heating when the particle sizes or magnetic parameters have optimal values as well as the exchange coupling beetwen the magnetic phases increases. In addition the relaxation loss is the main mechanism contributing to the SAR in this experiment. The CS CF FO NPs with superparamagnetic core particle size are potential candidates for magnetic hyperthermia. CÁC HẠT NANO TỪ LÕI - VỎ CoFe2O4 Fe3O4 CHO ĐỐT NÓNG CẢM ỨNG HIỆU QUẢ Lê Thị Hồng Phong1 2 Phạm Hồng Nam1 Nguyễn Văn Đăng3 Phạm Thanh Phong4 Jozef Kovácˇ5 Ivan Skorvanek5 Đỗ Hùng Mạnh1 2 1ViệnKhoa .