Preparation and Analytical Application of Mimetic Enzyme Hemin-Loading Magnetic Silica Nanotubes

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We report here the preparation and analytical application of mimetic enzyme-loading magnetic silica nanotubes (MSNs), which were synthesized via alumina template membrane method. The nanotubes integrate the advantages of silica nanotubes and superparamagnetic characteristics. Hemin (a peroxidase mimic) was selected as a model for enzyme assays to demonstrate the applicability of these MSNs in enzyme immobilization. The immobilized hemin exhibited excellent catalytic activity and reusability. Using the immobilized hemin as the catalyst, the fluorometric measurement of thiamine has been achieved with a detection limit of 2.5 × 10−8 mol/L. Our work herein reveals that the surface functionalized MSNs will be a promising platform as biocatalyst carriers.


Document Type: Research Article


Publication date: September 1, 2010

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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