Effects of the concentration of tetramethylammonium hydroxide peptizer on the synthesis of Fe3O4/SiO2 core/shell nanoparticles

被引：52

作者：

Lu, ZY ^{[1
]}

Wang, G ^{[1
]}

Zhuang, JQ ^{[1
]}

Yang, WS ^{[1
]}

机构：

[1] Jilin Univ, Coll Chem, Alan G MacDiarmid Lab, Changchun 130023, Peoples R China

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2006年 / 278卷 / 1-3期

基金：

中国国家自然科学基金;

关键词：

Fe3O4; magnetic nanoparticle; core/shell; peptizer; silica;

D O I：

10.1016/j.colsurfa.2005.09.048

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：

Different amounts of tetramethylammonium hydroxide (TMA) were employed to peptize the Fe3O4 magnetic nanoparticles. Electrophoresis measurements show that the stability of the magnetic nanoparticles is dependent on the amount of TMA used. After growth of the silica protection layer on the nanoparticle surface, Fe3O4/SiO2 composite core/shell particles with different number of cores were synthesized. Under the optimal amount of TMA used, uniform Fe3O4/SiO2 Composite core/shell nanoparticles with a poly-dispersivity of 10.8% were prepared. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：140 / 143

页数：4

共 13 条

[1] PHASE-DIAGRAM OF AN IONIC MAGNETIC COLLOID - EXPERIMENTAL-STUDY OF THE EFFECT OF IONIC-STRENGTH [J].

BACRI, JC ;

PERZYNSKI, R ;

SALIN, D ;

CABUIL, V ;

MASSART, R .

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1989, 132 (01) :43-53

[2]

DEGENNES PG, 1970, PHYS KONDENS MATER, V11, P189

[3] Self-assembled magnetic matrices for DNA separation chips [J].

Doyle, PS ;

Bibette, J ;

Bancaud, A ;

Viovy, JL .

SCIENCE, 2002, 295 (5563) :2237-2237

[4]

Hasmonay E, 1999, J PHYS CHEM B, V103, P6421, DOI 10.1021/jp9900180CCC:$18.00

[5] A novel two-step silica-coating process for engineering magnetic nanocomposites [J].

Liu, QX ;

Xu, ZH ;

Finch, JA ;

Egerton, R .

CHEMISTRY OF MATERIALS, 1998, 10 (12) :3936-3940

[6] PREPARATION OF AQUEOUS MAGNETIC LIQUIDS IN ALKALINE AND ACIDIC MEDIA [J].

MASSART, R .

IEEE TRANSACTIONS ON MAGNETICS, 1981, 17 (02) :1247-1248

[7] MAGNETIC SILICA DISPERSIONS - PREPARATION AND STABILITY OF SURFACE-MODIFIED SILICA PARTICLES WITH A MAGNETIC CORE [J].

PHILIPSE, AP ;

VANBRUGGEN, MPB ;

PATHMAMANOHARAN, C .

LANGMUIR, 1994, 10 (01) :92-99

[8] Beating the superparamagnetic limit with exchange bias [J].

Skumryev, V ;

Stoyanov, S ;

Zhang, Y ;

Hadjipanayis, G ;

Givord, D ;

Nogués, J .

NATURE, 2003, 423 (6942) :850-853

[9] CONTROLLED GROWTH OF MONODISPERSE SILICA SPHERES IN MICRON SIZE RANGE [J].

STOBER, W ;

FINK, A ;

BOHN, E .

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1968, 26 (01) :62-&

[10] Monodisperse FePt nanoparticles and ferromagnetic FePt nanocrystal superlattices [J].

Sun, SH ;

Murray, CB ;

Weller, D ;

Folks, L ;

Moser, A .

SCIENCE, 2000, 287 (5460) :1989-1992

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