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Preparation and characterization of amino-silane modified superparamagnetic silica nanospheres
Alternative TitleJ. Magn. Magn. Mater.
Liu, XQ; Ma, ZY; Xing, JM; Liu, HZ
2004-03-01
Source PublicationJOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
ISSN0304-8853
Volume270Issue:1-2Pages:1-6
AbstractMagnetite 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.
KeywordPreparation Amino-silane Magnetic Silica Nanosphere Protein Immobilization
SubtypeArticle
WOS HeadingsScience & Technology ; Technology ; Physical Sciences
DOI10.1016/j.jmmm.2003.07.006
URL查看原文
Indexed BySCI
Language英语
WOS KeywordENZYME IMMOBILIZATION ; MAGNETIC PARTICLES ; PURIFICATION ; MICROSPHERES ; PROTEINS
WOS Research AreaMaterials Science ; Physics
WOS SubjectMaterials Science, Multidisciplinary ; Physics, Condensed Matter
WOS IDWOS:000188887400001
Citation statistics
Cited Times:381[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/4990
Collection研究所(批量导入)
AffiliationChinese Acad Sci, Inst Proc Engn, State Key Lab Biochem Engn, Lab Separat Sci & Engn, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
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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