Size-dependent magnetic responsiveness of magnetite nanoparticles synthesised by co-precipitation and solvothermal methods

被引：59

作者：

Thanh Quang Bui ^{[1
]}

Suong Nu-Cam Ton ^{[1
]}

Anh Trong Duong ^{[1
]}

Hoa Thai Tran ^{[1
]}

机构：

[1] Hue Univ, Coll Sci, Dept Chem, Hue, Vietnam

来源：

JOURNAL OF SCIENCE-ADVANCED MATERIALS AND DEVICES | 2018年 / 3卷 / 01期

关键词：

Fe3O4; Magnetite nanoparticles; Co-precipitation; Solvothermal; Magnetic responsiveness-particle size relationship; NANOCLUSTERS; WATER;

D O I：

10.1016/j.jsamd.2017.11.002

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The dependence of the magnetic responsiveness on magnetite nanoparticle size has been studied. Monodisperse magnetite nanoparticles of 10 nm diameter were prepared by an ultrasonically enhanced co-precipitation procedure. A carboxyl-functionalised solvothermal approach was applied to synthesise magnetite nanoparticles with an average size of 30 nm. The particle sizes and their distribution have been determined by analysing TEM images and considering nanoparticle formation mechanisms. The magnetic characterisation revealed an inverse dependence between the magnetite nanoparticle size and its ability to respond to external magnetic fields, which was explained by the decrease of magnetic dipoles inside the tailing-away crystal of the magnetite nanoparticles. Negligible hysteresis with a small value of 5 Oe was found for the 10 nm nanoparticles, while the larger value of 80 Oe was determined for the 30 nm nanoparticles. (c) 2017 The Authors. Publishing services by Elsevier B.V. on behalf of Vietnam National University, Hanoi.

引用

页码：107 / 112

页数：6