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Enhanced Stability of Enzymes Adsorbed onto Nanoparticles

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We have discovered that the highly curved surface of C60 fullerenes enhances enzyme stability in strongly denaturing environments to a greater extent than flat supports. The half-life of a model enzyme, soybean peroxidase, adsorbed onto fullerenes at 95 °C was 117 min, ca. 2.5-fold higher than that of the enzyme adsorbed onto graphite flakes and ca. 13-fold higher than that of the native enzyme. Furthermore, this phenomenon is not unique to fullerenes, but can also be extended to other nanoscale supports including silica and gold nanoparticles. The enhanced stability was exploited in the preparation of highly active and stable polymer-nanocomposite films. The ability to enhance protein stability by interfacing them with nanomaterials may impact numerous fields ranging from the design of diagnostics, sensors, and nanocomposites to drug delivery.
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Keywords: BIOCATALYTIC FILMS; ENZYME STABILITY; FULLERENES; NANOPARTICLES

Document Type: Research Article

Publication date: 01 April 2007

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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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