Authors: Jieying Jing Yu Zhang Jiangyu Liang Qingbo Zhang Erika Bryant Carolina Avendano Vicki L Colvin Yiding Wang Wenying Li William W Yu
Publish Date: 2012/03/25
Volume: 14, Issue: 4, Pages: 827-
Abstract
Hydrophilic functionalization of nanoparticle surface is essential for their biomedical applications Herein we report a facile onestep reverse precipitation method to synthesize waterdispersible biocompatible and carboxylatefunctionalized superparamagnetic magnetite Fe3O4 nanoparticles with the help of biocompatible sodium citrate salt Transmission electron microscope TEM Xray diffraction XRD Fourier transform infrared spectroscopy FTIR zeta potential measurement dynamic light scattering DLS and superconducting quantum interference device SQUID were used to characterize the asprepared magnetite nanoparticles The size of the asprepared magnetite nanoparticles was tuned from 27 ± 38 to 48 ± 19 nm by changing the sodium citrate concentration from 25 to 125 mM The sodium citrate concentration also influenced the waterdispersible stability of the asprepared magnetite nanoparticles which was due to the electrostatic repulsionThe authors thank the financial supports from the Shanxi Returned Scholarship Funding 20102 the Program for Changjiang Scholars 2009 the State Key Laboratory on Integrated Optoelectronics in Jilin University the National 863 Project 2011AA050509 the Shandong Taishan Scholarship and the Center for Biological and Environmental Nanotechnology EEC0647452 through NSF JYJ also thanks the China Scholarship Council for a graduate study grant 2009693001
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