A facile solution phase synthesis of directly ordering monodisperse FePt nanoparticles  

作　　者：Yongsheng Yu Lin He Junjie Xu Jiaming Li Sida Jiang Guanghui Han Baojiang Jiang Wenjuan Lei Weiwei Yang Yanglong Hou 

机构地区：[1]MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage,School of Chemistry and Chemical Engineering,Harbin Institute of Technology,Harbin 150001,China [2]Beijing Key Laboratory for Magnetoelectric Materials and Devices(BKL-MMD),Beijing Innovation Center for Engineering Science and Advanced Technology(BIC-ESAT),School of Materials Science and Engineering,Peking University,Beijing 100871,China [3]School of Physics,Harbin Institute of Technology,Harbin 150001,China [4]Research Center of Basic Space Science,Harbin Institute of Technology,Harbin 150001,China [5]Key Laboratory of Functional Inorganic Material Chemistry,Ministry of Education of the Peoples Republic of China,Heilongjiang University,Harbin 150080,China

出　　处：《Nano Research》2022年第1期446-451,共6页纳米研究（英文版）

基　　金：supported by the National Natural Science Foundation of China under Grant(Nos.51871078,51631001 and 51590882);the National Key R&D Program of China(No.2016YFA0200102);Heilongjiang Science Foundation(No.E2018028).

摘　　要：The ordered Pt-based intermetallic nanoparticles(NPs)with small size show superior magnetic or catalytic properties,but the synthesis of these NPs still remains a great challenge due to the requirement of high temperature annealing for the formation of the ordered phase,which usually leads to sintering of the NPs.Here,we report a simple approach to directly synthesize monodisperse ordered L1_(0)-FePt NPs with average size 10.7 nm without further annealing or doping the third metal atoms,in which hexadecyltrimethylammonium chloride(CTAC)was found to be the key inducing agent for the thermodynamic growth of the Fe and Pt atoms into the ordered intermetallic structure in the synthetic process.In particular,10.7 nm L1_(0)-FePt NPs synthesized by the proper amount of CTAC show a coercivity of 3.15 kOe and saturation magnetization of 45 emu/g at room temperature.The current CTAC-assisted synthetic strategy makes it possible to deeply understand the formation of the ordered Pt-based intermetallic NP in solution phase synthesis.

关 键 词：L1_(0)-FePt direct ordering nanoparticles magnetic properties 

分 类 号：TB383[一般工业技术—材料科学与工程] O64[理学—物理化学]