Synthesis of variously shaped magnetic FeCo nanoparticles and the growth mechanism of FeCo nanocubes

IMR OpenIR

	Synthesis of variously shaped magnetic FeCo nanoparticles and the growth mechanism of FeCo nanocubes
	Yuan, Jie; Li, Cai-Fu; Liu, Zhi-Quan; Di Wu; Cao, Lihua; Liu, ZQ (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China.; Liu, ZQ (reprint author), Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Liaoning, Peoples R China.
	2017-11-21
发表期刊	ROYAL SOC CHEMISTRY
ISSN	1466-8033
卷号	19 期号:43 页码:6506-6515
摘要	By varying the molar ratio of Fe2+/Co2+ and the concentration of PEG-400 and cyclohexane, as well as the reaction temperature and time, FeCo alloy nanoparticles with different morphologies have been synthesized successfully, in which the iron content could be adjusted in the range of 17-84 at%. Accompanying the decrease of the Fe2+/Co2+ molar ratio from 5 : 1 to 1 : 5, the shapes of FeCo nanoparticles change from sheets, cubes and spheres to flower-like particles, which were confirmed by X-ray powder diffraction, scanning electron microscopy and transmission electron microscopy. Typically, the growth direction of nanosheets is along the [110] direction exposing (110) surface planes, while FeCo nanocubes have a perfect square shape with clear-cut edges and expose {100} surface facets. It is found that the combined action of PEG-400 and cyclohexane plays a vital role in regulating the growth rate of different crystal facets. Under the assistance of PEG-400 and cyclohexane, the growth of perfect cubes with some intermediates can be observed. Their addition effects were discussed, and a "step-by-step surface wrapping" growth mechanism was proposed to illustrate the formation of nanocubes. Among different nanoparticles, Fe75Co25 nanocubes (250 +/- 10 nm) have the highest saturation magnetization, which is measured to be 250 emu g(-1).; By varying the molar ratio of Fe2+/Co2+ and the concentration of PEG-400 and cyclohexane, as well as the reaction temperature and time, FeCo alloy nanoparticles with different morphologies have been synthesized successfully, in which the iron content could be adjusted in the range of 17-84 at%. Accompanying the decrease of the Fe2+/Co2+ molar ratio from 5 : 1 to 1 : 5, the shapes of FeCo nanoparticles change from sheets, cubes and spheres to flower-like particles, which were confirmed by X-ray powder diffraction, scanning electron microscopy and transmission electron microscopy. Typically, the growth direction of nanosheets is along the [110] direction exposing (110) surface planes, while FeCo nanocubes have a perfect square shape with clear-cut edges and expose {100} surface facets. It is found that the combined action of PEG-400 and cyclohexane plays a vital role in regulating the growth rate of different crystal facets. Under the assistance of PEG-400 and cyclohexane, the growth of perfect cubes with some intermediates can be observed. Their addition effects were discussed, and a "step-by-step surface wrapping" growth mechanism was proposed to illustrate the formation of nanocubes. Among different nanoparticles, Fe75Co25 nanocubes (250 +/- 10 nm) have the highest saturation magnetization, which is measured to be 250 emu g(-1).
部门归属	[yuan, jie ; li, cai-fu ; liu, zhi-quan ; di wu ; cao, lihua] chinese acad sci, inst met res, shenyang 110016, liaoning, peoples r china ; [yuan, jie ; liu, zhi-quan] univ sci & technol china, sch mat sci & engn, shenyang 110016, liaoning, peoples r china
学科领域	Chemistry, Multidisciplinary ; Crystallography
资助者	National Key Research and Development Program of China [2017YFB0305501]; Natural Science Foundation of China [51401218]
收录类别	SCI
语种	英语
WOS记录号	WOS:000414494700013
引用统计	被引频次：24[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/78972
专题	中国科学院金属研究所
通讯作者	Liu, ZQ (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China.; Liu, ZQ (reprint author), Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Liaoning, Peoples R China.
推荐引用方式 GB/T 7714	Yuan, Jie,Li, Cai-Fu,Liu, Zhi-Quan,et al. Synthesis of variously shaped magnetic FeCo nanoparticles and the growth mechanism of FeCo nanocubes[J]. ROYAL SOC CHEMISTRY,2017,19(43):6506-6515.
APA	Yuan, Jie.,Li, Cai-Fu.,Liu, Zhi-Quan.,Di Wu.,Cao, Lihua.,...&Liu, ZQ .(2017).Synthesis of variously shaped magnetic FeCo nanoparticles and the growth mechanism of FeCo nanocubes.ROYAL SOC CHEMISTRY,19(43),6506-6515.
MLA	Yuan, Jie,et al."Synthesis of variously shaped magnetic FeCo nanoparticles and the growth mechanism of FeCo nanocubes".ROYAL SOC CHEMISTRY 19.43(2017):6506-6515.