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Kwak, Ja Hun
Molecular Catalysis lab
Research Interests
  • Heterogeneous catalysis, molecular catalysis, ASlumima, zeolites

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Simple synthesis of functionalized superparamagnetic magnetite/silica core/shell nanoparticles and their application as magnetically separable high-performance biocatalysts

Cited 204 times inthomson ciCited 206 times inthomson ci
Title
Simple synthesis of functionalized superparamagnetic magnetite/silica core/shell nanoparticles and their application as magnetically separable high-performance biocatalysts
Other Titles
Simple synthesis of functionalized superparamagnetic magnetite/silica core/shell nanoparticles and their application as magnetically separable high-performance biocatalysts
Author
Lee, JinwooLee, YoujinYoun, Jong KyuBin Na, HyonYu, TaekyungKim, HwanLee, Sang-MokKoo, Yoon-MoKwak, Ja HunPark, Hyun GyuChang, Ho NamHwang, MisunPark, Je-GeunKim, JungbaeHyeon, Taeghwan
Keywords
HISTIDINE-TAGGED PROTEINS;  MESOPOROUS SILICA;  COBALT NANORODS;  NANOCOMPOSITES;  NANOCRYSTALS;  SIZE
Issue Date
2008-01
Publisher
WILEY-V C H VERLAG GMBH
Citation
SMALL, v.4, no.1, pp.143 - 152
Abstract
Uniformly sized silica-coated magnetic nanoparticles (magnetite@silica) are synthesized in a simple one-pot process using reverse micelles as nanoreactors. The core diameter of the magnetic nanoparticles is easily controlled by adjusting the w value ([polar solvent]/[surfactant]) in the reverse-micelle solution, and the thickness of the silica shell is easily controlled by varying the amount of tetraethyl orthosilicate added after the synthesis of the magnetite cores. Several grams of monodisperse magnetite@silica nanoparticles can be synthesized without going through any size-selection process. When crosslinked enzyme molecules form clusters on the surfaces of the magnetite@silica nanoparticles, the resulting hybrid composites are magnetically separable, highly active, and stable under harsh shaking conditions for more than 15 days. Conversely, covalently attached enzymes on the surface of the magnetite@silica nanoparticles are deactivated under the same conditions
URI
https://scholarworks.unist.ac.kr/handle/201301/12127
DOI
10.1002/smll.200700456
ISSN
1613-6810
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