Synthesis and characterization of Fe_3O_4 magnetic nanoparticles and their heating effects under radiofrequency capacitive field  

作　　者：李旭红 冯志明 欧阳伟炜 谢小雪 廖遇平 唐劲天 

机构地区：[1]Department of Rehabilitation,Third Xiangya Hospital,Central South University [2]Department of Oncology,Xiangya Hospital,Central South University [3]College of Chemistry and Chemical Engineering,Hunan Normal University [4]Institute of Engineering and Physics,Ts inghua University

出　　处：《Journal of Central South University》2010年第6期1185-1189,共5页中南大学学报（英文版）

基　　金：Projects(30571779,10775085) supported by the National Natural Science Foundation of China;Project(Z07000200540704) supported by Beijing Municipal Science and Technology Commission,China

摘　　要：Fe3O4 magnetic nanoparticles with diameters varying from 10 to 426 nm were synthesized and characterized.Heating effects of Fe3O4 magnetic nanoparticles under radiofrequency capacitive field(RCF) with frequency of 27.12 MHz and power of 60-150 W were investigated.When the power of RCF is lower than 90 W,temperatures of Fe3O4 magnetic nanoparticles(75-150 mg/mL) can be raised and maximal temperatures are all lower than 50 ℃.When the power of RCF is 90-150 W,temperatures of Fe3O4 magnetic nanoparticles can be quickly raised and are all obviously higher than those of normal saline and distilled water under the same conditions.Temperature of Fe3O4 magnetic nanoparticles can even reach 70.2 ℃ under 150 W RCF.Heating effects of Fe3O4 magnetic nanoparticles are related to RCF power,particle size and particle concentration.Fe3O4 magnetic nanoparticles with diameters varying from 10 to 426 nm were synthesized and characterized. Heating effects of Fe3O4 magnetic nanoparticles under radiofrequency capacitive field （RCF） with frequency of 27.12 MHz and power of 60-150 W were investigated. When the power of RCF is lower than 90 W, temperatures of Fe3O4 magnetic nanoparticles （75-150 mg/mL） can be raised and maximal temperatures are all lower than 50 ℃. When the power of RCF is 90-150 W, temperatures of Fe3O4 magnetic nanoparticles can be quickly raised and are all obviously higher than those of normal saline and distilled water under the same conditions. Temperature of Fe3O4magnetic nanoparticles can even reach 70.2 ℃ under 150 W RCF. Heating effects of Fe3O4 magnetic nanoparticles are related to RCF power, particle size and particle concentration.

关 键 词：Fe3O4 magnetic nanoparticles radiofrequency capacitive field SYNTHESIS characterization heating effects 

分 类 号：O482.5[理学—固体物理]