Surface Modification of Magnetic Nanoparticles Using Gum Arabic

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 scatt...

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Bibliographic Details
Published in:Journal of nanoparticle research : an interdisciplinary forum for nanoscale science and technology 2006-10, Vol.8 (5), p.749-753
Main Authors: Williams, Darryl N., Gold, Katie A., Holoman, Tracey R. Pulliam, Ehrman, Sheryl H., Wilson, Otto C.
Format: Article
Language:English
Subjects:
Iron oxides
Light scattering
Microscopes
Minerals
Nanoparticles
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Summary: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 tocolloid stability via steric stabilization. It was determined that the adsorption of GA onto magnetite exhibits Langmuir behavior.[PUBLICATION ABSTRACT]
ISSN:1388-0764
1572-896X
DOI:10.1007/s11051-006-9084-7