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A Facile Approach to Synthesize Alumina Nanostructures at Room Temperature

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Alumina nanostructures, nanowires, and semicolumn nanotubes with high aspect ratios were synthesized by the chemical etching of porous alumina membranes (PAMs) in phosphoric acid solution. The morphology and structure of alumina nanostructures were analyzed by scanning electron microscopy (SEM), energy dispersive spectrum (EDS), and X-ray diffraction (XRD), respectively. The results showed that the typical features of highly flexible nanostructures were around 20–40 nm in diameter and around 100 μm in length. EDS analysis indicated that the nanostructures were constructed by aluminum oxide. The crystalline structure of the alumina nanostructures was amorphous, which was in accordance with that of the PAMs. Furthermore, the morphology of the PAMs was characterized in detail by atomic force microscope (AFM) and SEM. On the basis of AFM and SEM observations, a possible formation mechanism of alumina nanostructures was discussed, and the inhomogeneous dissolution between the triple points and the side walls was considered to be the essential factor deciding the formation of nanostructures.
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Document Type: Research Article

Publication date: 2010-03-01

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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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