摘要
A nontoxic and biocompatible thermoseed is developed for the magnetic hyperthermia.Two kinds of thermoseed materials:hierarchical hollow and solid lichee-like Fe_(3)O_(4) assemblies,are synthesized by a facile hydrothermal method.The crystal structure of Fe_(3)O_(4) assemblies are characterized by x-ray diffraction,scanning electron microscopy,and transmission electron microscopy.Moreover,the prepared Fe_(3)O_(4) assemblies are used as a magnetic heat treatment agent,and their heating efficiency is investigated.Compared to solid assembly,hollow lichee-like Fe_(3)O_(4) assembly exhibits a higher specific absorption rate of 116.53 W/g and a shorter heating time,which is ascribed to its higher saturation magnetization,larger initial particle size,and the unique hierarchical hollow structure.Furthermore,the magnetothermal effect is primarily attributed to Neel relaxation.Overall,we propose a facile and convenient approach to enhance the heating efficiency of magnetic nanoparticles by forming hollow hierarchical assemblies.
作者
李文宇
李文涛
李榜全
董丽娟
孟田华
霍格
梁工英
卢学刚
Wen-Yu Li;Wen-Tao Li;Bang-Quan Li;Li-Juan Dong;Tian-Hua Meng;Ge Huo;Gong-Ying Liang;Xue-Gang Lu(Institute of Solid State Physics,Shanxi Datong University,Datong 037009,China;MOE Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter,School of Physics,Xi’an Jiaotong University,Xi’an 710049,China;College of Material Science and Engineering,Shenzhen University,Shenzhen 518061,China;No.93601 Troops of PLA)
基金
supported by the National Natural Science Foundation of China(Grant No.61975162)
Youth Research Foundation of Shanxi Datong University(Grant No.2019Q1)
Important R&D Projects of Shanxi Province,China(Grant No.201803D121083)
Shanxi Scholarship Council,China(Grant No.2020-135)。