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One-Step Silica Coating of Cetyltrimethyl Ammonium Bromide-Stabilized α-Fe2O3

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The α-Fe2O3 nanoparticles were coated with silica using intermediated surfactant such as cetyltrimethyl ammonium bromide (CTAB). After the formation of a thin intermediate layer in basic solution without any purification, TEOS was added directly to the solution for further silica growing. Silica thickness can be controlled through the various synthetic conditions (5 to 50 nm). The synthesized powder was characterized by X-ray powder diffraction (XRD), transmission electron microscopy (TEM) and UV-visible spectroscopy. XRD and UV-visible spectroscopy of silica coated α-Fe2O3 is preserved constant after coating silica, suggesting that the SiO2 layers can be regarded as protecting layers without destroying the properties of the α-Fe2O3 nanoparticles.
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Document Type: Short Communication

Publication date: 2010-01-01

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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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