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Preparation and characterization of amino-silane modified superparamagnetic silica nanospheres
其他题名J. Magn. Magn. Mater.
Liu, XQ; Ma, ZY; Xing, JM; Liu, HZ
2004-03-01
发表期刊JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
ISSN0304-8853
卷号270期号:1-2页码:1-6
摘要Magnetite nanoparticles were prepared by coprecipitation of Fe2+ and Fe3+ with NH4OH, and then, silica was coated on the surface of the magnetite nanoparticles to form well-dispersed magnetic silica nanospheres. The size of spheres was controlled by changing the ratio of SiO2 to Fe3O4. Amino-silane was covalently coupled to the surface of the magnetic silica nanospheres and activated by glutaraldehyde. The morphology and magnetic properties of magnetic silica nanospheres were examined by TEM and VSM. The nanospheres have an average size of 100-200 nm diameter and possess superparamagnetic characteristics. Powder X-ray diffraction measurements show the spinel structure for the magnetite particles coated by silica. By protein immobilization assay, it was proved that the amino-silane treated magnetic silica nanospheres could significantly improve the capacity of protein immobilization. (C) 2003 Published by Elsevier B.V.; Magnetite nanoparticles were prepared by coprecipitation of Fe2+ and Fe3+ with NH4OH, and then, silica was coated on the surface of the magnetite nanoparticles to form well-dispersed magnetic silica nanospheres. The size of spheres was controlled by changing the ratio of SiO2 to Fe3O4. Amino-silane was covalently coupled to the surface of the magnetic silica nanospheres and activated by glutaraldehyde. The morphology and magnetic properties of magnetic silica nanospheres were examined by TEM and VSM. The nanospheres have an average size of 100-200 nm diameter and possess superparamagnetic characteristics. Powder X-ray diffraction measurements show the spinel structure for the magnetite particles coated by silica. By protein immobilization assay, it was proved that the amino-silane treated magnetic silica nanospheres could significantly improve the capacity of protein immobilization. (C) 2003 Published by Elsevier B.V.
关键词Preparation Amino-silane Magnetic Silica Nanosphere Protein Immobilization
文章类型Article
WOS标题词Science & Technology ; Technology ; Physical Sciences
DOI10.1016/j.jmmm.2003.07.006
URL查看原文
收录类别SCI
语种英语
关键词[WOS]ENZYME IMMOBILIZATION ; MAGNETIC PARTICLES ; PURIFICATION ; MICROSPHERES ; PROTEINS
WOS研究方向Materials Science ; Physics
WOS类目Materials Science, Multidisciplinary ; Physics, Condensed Matter
WOS记录号WOS:000188887400001
引用统计
被引频次:360[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
版本出版稿
条目标识符http://ir.ipe.ac.cn/handle/122111/4990
专题研究所(批量导入)
作者单位Chinese Acad Sci, Inst Proc Engn, State Key Lab Biochem Engn, Lab Separat Sci & Engn, Beijing 100080, Peoples R China
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Liu, XQ,Ma, ZY,Xing, JM,et al. Preparation and characterization of amino-silane modified superparamagnetic silica nanospheres[J]. JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS,2004,270(1-2):1-6.
APA Liu, XQ,Ma, ZY,Xing, JM,&Liu, HZ.(2004).Preparation and characterization of amino-silane modified superparamagnetic silica nanospheres.JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS,270(1-2),1-6.
MLA Liu, XQ,et al."Preparation and characterization of amino-silane modified superparamagnetic silica nanospheres".JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS 270.1-2(2004):1-6.
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