Morphological transformation of Fe3O4 spherical aggregates from solid to hollow and their self-assembly under an external magnetic field

被引：168

作者：

Jia, Baoping ^{[1
]}

Gao, Lian ^{[1
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2008年 / 112卷 / 03期

关键词：

D O I：

10.1021/jp0763477

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The morphological development of spherical Fe3O4 aggregates has been investigated through a simple solvothermal process. Corresponding morphological transformation from solid spherical aggregates (resulting from the oriented aggregation of primary Fe3O4 nanocrystal) to novel flowerlike particles with hollow interiors has been observed. This transformation can be ascribed to the cooperation of oriented aggregation and Ostwald ripening mechanisms. Magnetic investigation indicates these Fe3O4 spheres present a superparamagnetic nature and can be adjustable as along their morphological variation. Moreover, these spherical particles were successfully aligned into one-dimensional necklacelike structures under an external magnetic field, displaying great potential in manipulation and organization of magnetic structures into integrated system.

引用

收藏

页码：666 / 671

页数：6

相关论文

共 47 条

[1] SPIN PINNING AT FERRITE-ORGANIC INTERFACES [J].

BERKOWITZ, AE ;

LAHUT, JA ;

JACOBS, IS ;

LEVINSON, LM ;

FORESTER, DW .

PHYSICAL REVIEW LETTERS, 1975, 34 (10) :594-597

[2] Plasticity in self-assembly: Templating generates functionally different circuits from a single precursor [J].

Boncheva, M ;

Ferrigno, R ;

Bruzewicz, DA ;

Whitesides, GM .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2003, 42 (29) :3368-3371

[3] Hexaferrite particles by coprecipitation and lyophilization [J].

Calleja, A ;

Tijero, E ;

Martínez, B ;

Piñol, S ;

Sandiumenge, F ;

Obradors, X .

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 1999, 196 :293-294

[4] Magnetic nanocomposite particles and hollow spheres constructed by a sequential layering approach [J].

Caruso, F ;

Spasova, M ;

Susha, A ;

Giersig, M ;

Caruso, RA .

CHEMISTRY OF MATERIALS, 2001, 13 (01) :109-116

[5] Formation of colloidal CuO nanocrystallites and their spherical aggregation and reductive transformation to hollow CU2O nanospheres [J].

Chang, Y ;

Teo, JJ ;

Zeng, HC .

LANGMUIR, 2005, 21 (03) :1074-1079

[6] Monodisperse magnetic single-crystal ferrite microspheres [J].

Deng, H ;

Li, XL ;

Peng, Q ;

Wang, X ;

Chen, JP ;

Li, YD .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2005, 44 (18) :2782-2785

[7] Template synthesis of nanoparticle arrays of gold, platinum and palladium in mesoporous silica films and powders [J].

Fukuoka, A ;

Araki, H ;

Kimura, J ;

Sakamoto, Y ;

Higuchi, T ;

Sugimoto, N ;

Inagaki, S ;

Ichikawa, M .

JOURNAL OF MATERIALS CHEMISTRY, 2004, 14 (04) :752-756

[8] Dynamic self-assembly of magnetized, millimetre-sized objects rotating at a liquid-air interface [J].

Grzybowski, BA ;

Stone, HA ;

Whitesides, GM .

NATURE, 2000, 405 (6790) :1033-1036

[9] Fabrication of Fe3O4 core-shell polyhedron based on a mechanism analogue to Ostwald ripening process [J].

Ha, Baoping ;

Gao, Lian .

JOURNAL OF CRYSTAL GROWTH, 2007, 303 (02) :616-621

[10] Simple preparation of monodisperse hollow silica particles without using templates [J].

Hah, HJ ;

Kim, JS ;

Jeon, BJ ;

Koo, SM ;

Lee, YE .

CHEMICAL COMMUNICATIONS, 2003, (14) :1712-1713

← 1 2 3 4 5 →