Surface modification of magnetic nanoparticles using gum arabic

被引：94

作者：

Williams, Darryl N. ^{[1
]}

Gold, Katie A.

Holoman, Tracey R. Pulliam

Ehrman, Sheryl H.

Wilson, Otto C., Jr.

机构：

[1] Univ Maryland, Dept Chem Engn, College Pk, MD 20742 USA

[2] Catholic Univ, Dept Biomed Engn, Washington, DC 20064 USA

来源：

JOURNAL OF NANOPARTICLE RESEARCH | 2006年 / 8卷 / 05期

基金：

美国国家科学基金会;

关键词：

gum arabic; magnetite; steric stabilization; surface modification;

D O I：

10.1007/s11051-006-9084-7

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Magnetite nanoparticles were synthesized and functionalized by coating the particle surfaces with gum arabic (GA) to improve particle stability in aqueous suspensions (i.e. biological media). Particle characterization was performed using transmission electron microscopy (TEM) and dynamic light scattering (DLS) to analyze the morphology and quantify the size distribution of the nanoparticles, respectively. The results from DLS indicated that the GA-treated nanoparticles formed smaller agglomerates as compared to the untreated samples over a 30-h time frame. Thermogravimetric analyses indicated an average weight loss of 23%, showing that GA has a strong affinity toward the iron oxide surface. GA most likely contributes to colloid stability via steric stabilization. It was determined that the adsorption of GA onto magnetite exhibits Langmuir behavior.

引用

页码：749 / 753

页数：5

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