High magnetisation, monodisperse and water-dispersible CoFe@Pt core/shell nanoparticles

被引：16

作者：

Dung, Ngo T. ^{[1
]}

Nguyen Viet Long ^{[2
]}

Tam, Le T. T. ^{[3
]}

Nam, Pham H. ^{[4
]}

Tung, Le D. ^{[5
,6
]}

Phuc, Nguyen X. ^{[4
]}

Lu, Le T. ^{[1
,7
]}

Thanh, Nguyen Thi Kim ^{[5
,6
]}

机构：

[1] VAST, ITT, 18 Hoang Quoc Viet, Hanoi, Vietnam

[2] Ton Duc Thang Univ, Ceram & Biomat Res Grp, Ho Chi Minh City, Vietnam

[3] Vietnam Natl Univ Sci, Hanoi Univ Sci, Fac Chem, 19 Le Thanh Tong, Hanoi, Vietnam

[4] VAST, Inst Mat Sci, 18 Hoang Quoc Viet, Hanoi, Vietnam

[5] UCL, Biophys Grp, Dept Phys & Astron, Gower St, London WC1E 6BT, England

[6] UCL Healthcare Biomagnet & Nanomat Labs, 21 Albemarle St, London W1S 4BS, England

[7] Grad Univ Sci & Technol, VAST, 18 Hoang Quoc Viet, Hanoi, Vietnam

来源：

NANOSCALE | 2017年 / 9卷 / 26期

基金：

英国工程与自然科学研究理事会;

关键词：

IRON-OXIDE NANOPARTICLES; AU NANOPARTICLES; COCOREAGSHELL NANOPARTICLES; COBALT NANOPARTICLES; CORE; HYPERTHERMIA; NANOCRYSTALS; OXIDATION; AGENTS; DECOMPOSITION;

D O I：

10.1039/c6nr09325f

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

High magnetisation and monodisperse CoFe alloy nanoparticles are desired for a wide range of biomedical applications. However, these CoFe nanoparticles are prone to oxidation, resulting in the deterioration of their magnetic properties. In the current work, CoFe alloy nanoparticles were prepared by thermal decomposition of cobalt and iron carbonyls in organic solvents at high temperatures. Using a seeded growth method, we successfully synthesised chemically stable CoFe@Pt core/shell nanostructures. The obtained core/shell nanoparticles have high saturation magnetisation up to 135 emu g(-1). The magnetisation value of the core/shell nanoparticles remains 93 emu g(-1) after being exposed to air for 12 weeks. Hydrophobic CoFe@Pt nanoparticles were rendered water-dispersible by encapsulating with poly(maleic anhydride-alt-1-octadecene) (PMAO). These nanoparticles were stable in water for at least 3 months and in a wide range of pH from 2 to 11.

引用

页码：8952 / 8961

页数：10

共 39 条

[1] Silica encapsulation and magnetic properties of FePt nanoparticles [J].