LI Shaoxia1, 2 WANG Bing1 MENG Qiang1, 2 FENG Weiyue1 WANG Zhuo2 KUI Rexi3 QIAN Haijie3 WANG Jia’o3 1. Synchrotron radiation photoelectron spectroscopy study of dextran-coated Fe3O4 magnetic nanoparticles[J]. Nuclear techniques, 2009, 32(4): 251-255.
LI Shaoxia1, 2 WANG Bing1 MENG Qiang1, 2 FENG Weiyue1 WANG Zhuo2 KUI Rexi3 QIAN Haijie3 WANG Jia’o3 1. Synchrotron radiation photoelectron spectroscopy study of dextran-coated Fe3O4 magnetic nanoparticles[J]. Nuclear techniques, 2009, 32(4): 251-255.DOI:
Dextran-coated Fe3O4 nanoparticles were prepared by untrasonification of Fe3O4 nanoparticles with dextran at 85°C in sodium citrate medium.The surface chemical component
structure and bond of uncoated and dextran-coated nanoparticles were measured by synchrotraon radiation XPS(X-ray photoelectron spectroscopy).Qualitative and quantitative analysis of C1s and O1s of Fe3O4 and dextran-Fe3O4 showed that the Fe3O4 nanoparticles were successively coated by sodium citrate via Fe-O-C bond
and dextrans
which can be linked with their carboxylate moiety via hydrogen bond.Sodium citrate could enhance the disperse stability of reaction system and hydrophilicity of dextran-Fe3O4.