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

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

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

Jinwoo Lee,Youjin Lee,Jong Kyu Youn,Hyon Bin Na,Taekyung Yu,Hwan Kim,Sang-Mok Lee,Yoon-Mo Koo,Ja Hun Kwak,Hyun Gyu Park,Ho Nam Chang,Misun Hwang,Je-Geun Park,Jungbae Kim,Taeghwan Hyeon,

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.

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

J Lee,Y Lee,JK Youn,HB Na,T Yu,H Kim,SM Lee,YM Koo,JH Kwak,HG Park,HN Chang,M Hwang,JG Park,J Kim,T Hyeon,

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

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Small (Weinheim an der Bergstrasse, Germany)

VOLUME: 4

Page Numbers: 143-52

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ISSN: 1613-6829

DAY: 17

MONTH: Jan

YEAR: 2008

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

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LANGUAGE: eng

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AFFILIATION: National Creative Research Initiative Center for Oxide Nanocrystalline Materials and School of Chemical Engineering, Seoul National University, Seoul 151-744, Korea.

Country: Germany

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