多元醇还原法制备片状六边形Fe_3O_4纳米颗粒  

Synthesis of Monodisperse Fe_3O_4 Magnetite Schistic Hexagonal Nanocrystals by Polyol Reduction Method

作　　者：李芳[1] 杜雪岩[1] 杨瑞成[1] 

机构地区：[1]兰州理工大学材料科学与工程学院甘肃省有色金属新材料省部共建国家重点实验室,兰州730050

出　　处：《高等学校化学学报》2011年第8期1688-1691,共4页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:51061009);兰州理工大学博士基金(批准号:SB1200602)资助

摘　　要：使用油酸和油胺作表面活性剂,在二苄醚体系中,采用1,2-十二烷二醇还原前驱体乙酰丙酮铁[Fe(acac)3],通过表面活性剂、金属前驱体以及液相环境的共同作用,制备了单分散片状六边形Fe3O4纳米颗粒.分析了表面活性剂和还原剂多元醇对纳米颗粒尺寸及形貌的影响.TEM结果表明,与未使用表面活性剂时相比,油酸和油胺的加入抑制了颗粒的生长,使颗粒尺寸从24.2 nm降低到7.6 nm;使颗粒形貌多样化,出现了片状六边形形貌的Fe3O4纳米颗粒.磁性能检测结果表明,Fe3O4纳米颗粒具有高饱和磁化强度(Ms=88 A.m2/kg)和零剩磁的特点,有望作为磁标记材料应用于生物检测领域.Based on the cooperation of surfactants,metal precuesor and liquid environment,monodisperse nanoparticles of hexagonal Fe3O4 magnetite were prepared by 1,2-dodecanediol reduction of iron acetylacetonate[Fe（acac）3] in the presence of oleic acid and oleylamine.The effects of surfactants reductant on the particles＇ size and morphology were examined.TEM results show that the use of oleic acid and oleylamine su-ppressed the growth of magnetite nanoparticles and made the particles size reduced from 24.2 nm to 7.6 nm;a variety of particles morphology arose and schistic hexagonal Fe3O4 nanoparticles were achieved.Magnetic properties show that the as-synthesized Fe3O4 nanoparticles possess features of high saturation magnetization Ms（88 A／5m2/kg） and zero remanent magnetization Mr,facilitating their use as magnetic tags for biomedical applications.

关 键 词：多元醇还原法 六边形Fe3O4纳米颗粒 油酸 油胺 1 2-十二烷二醇 磁标记 

分 类 号：O614.8[理学—无机化学] O644[理学—化学]