Colloidal dispersions of monodisperse magnetite nanoparticles modified with poly(ethylene glycol)

被引：120
作者：
Barrera, Carola
Herrera, Adriana P.
Rinaldi, Carlos [1 ]
机构：
[1] Univ Puerto Rico, Dept Chem Engn, Mayaguez, PR 00680 USA
来源：
JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2009年 / 329卷 / 01期
基金：
美国国家科学基金会;
关键词：
Magnetite; Thermal decomposition; PEG; PFG-silane; APS; Steric stabilization; SURFACE MODIFICATION; THEORETICAL-ANALYSIS; DEXTRAN CHAINS; SEPARATION; CONFORMATION; PARTICLES; STABILITY; CARRIERS; COMPLEX; SILANE;
D O I：
10.1016/j.jcis.2008.09.071
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：
Monodisperse magnetite nanoparticles modified with poly(ethylene glycol) (PEG) were synthesized using a silane functionalized PEG obtained by reacting 3-aminopropyl triethoxysilane with carboxylic acid-methoxy PEG (mPEG-COOH) Using amide reactions. Transmission electron microscopy (TEM) dynamic, light scattering (DLS), and zeta potential measurements show the particles are monodisperse (sigma(gv) similar to 0.2) and stable in water for pH of 3-9 and ionic strengths, up to 0.3 M NaCl. Thermogravimetric analysis Coupled with TEM and DLS indicates formation of a dense graft layer oil the particle surface. An analysis of the interparticle interaction energy indicates that the particles are stabilized by strong steric repulsions between PEG chains on their surface. (C) 2008 Elsevier Inc. All rights reserved.
引用
收藏
页码：107 / 113
页数：7
相关论文
共 55 条
  • [1] Magnetite-loaded polymeric micelles as ultrasensitive magnetic-resonance probes
    Ai, H
    Flask, C
    Weinberg, B
    Shuai, X
    Pagel, MD
    Farrell, D
    Duerk, J
    Gao, JM
    [J]. ADVANCED MATERIALS, 2005, 17 (16) : 1949 - +
  • [2] In vitro study of ferromagnetic stents for implant assisted-magnetic drug targeting
    Aviles, Misael O.
    Chen, Haitao
    Ebner, Armin D.
    Rosengart, Axel J.
    Kaminski, Michael D.
    Ritter, James A.
    [J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2007, 311 (01) : 306 - 311
  • [3] Ferromagnetic seeding for the magnetic targeting of drugs and radiation in capillary beds
    Aviles, Misael O.
    Ebner, Armin D.
    Ritter, James A.
    [J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2007, 310 (01) : 131 - 144
  • [4] Synthesis, characterisation and application of silica-magnetite nanocomposites
    Bruce, IJ
    Taylor, J
    Todd, M
    Davies, MJ
    Borioni, E
    Sangregorio, C
    Sen, T
    [J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2004, 284 : 145 - 160
  • [5] Protein separations using colloidal magnetic nanoparticles
    Bucak, S
    Jones, DA
    Laibinis, PE
    Hatton, TA
    [J]. BIOTECHNOLOGY PROGRESS, 2003, 19 (02) : 477 - 484
  • [6] Preparation of ultrafine silica- and PEG-coated magnetite particles
    Butterworth, MD
    Illum, L
    Davis, SS
    [J]. COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 2001, 179 (01) : 93 - 102
  • [7] CALERO VL, 2006, ENCY SENSORS, V5, P389
  • [8] Preparation and properties of bio-compatible magnetic Fe3O4 nanoparticles
    Chan, H. T.
    Do, Y. Y.
    Huang, P. L.
    Chien, P. L.
    Chan, T. S.
    Liu, R. S.
    Huang, C. Y.
    Yang, S. Y.
    Horng, H. E.
    [J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2006, 304 (01) : E415 - E417
  • [9] Soret coefficients for aqueous polyethylene glycol solutions and some tests of the segmental model of polymer thermal diffusion
    Chan, J
    Popov, JJ
    Kolisnek-Kehl, S
    Leaist, DG
    [J]. JOURNAL OF SOLUTION CHEMISTRY, 2003, 32 (03) : 197 - 214
  • [10] MEASUREMENTS OF PARTICLE-SIZE DISTRIBUTION PARAMETERS IN FERROFLUIDS
    CHANTRELL, RW
    POPPLEWELL, J
    CHARLES, SW
    [J]. IEEE TRANSACTIONS ON MAGNETICS, 1978, 14 (05) : 975 - 977
123456