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Reports on Applied Surface Science from National Cheng Kung University Provide New Insights (Growth of porous anodized alumina on the sputtered...

August 1, 2014



Reports on Applied Surface Science from National Cheng Kung University Provide New Insights (Growth of porous anodized alumina on the sputtered aluminum films with 2D-3D morphology for high specific surface area)

By a News Reporter-Staff News Editor at Science Letter -- Current study results on Science have been published. According to news reporting originating from Tainan, Taiwan, by NewsRx correspondents, research stated, "The porous anodic aluminum oxide (AAO) with high-aspect-ratio pore channels is widely used as a template for fabricating nanowires or other one-dimensional (1D) nanostructures. The high specific surface area of AAO can also be applied to the super capacitor and the supporting substrate for catalysis."

Our news editors obtained a quote from the research from National Cheng Kung University, "The rough surface could be helpful to enhance specific surface area but it generally results in electrical field concentration even to ruin AAO. In this article, the aluminum (Al) films with the varied 2D-3D morphology on Si substrates were prepared using magnetron sputtering at a power of 50 W-185 W for 1 h at a working pressure of 2.5 x 10(-1) Pa. Then, AAO was fabricated from the different Al films by means of one-step hybrid pulse anodizing (HPA) between the positive 40 V and the negative -2 V (1 s:1 s) for 3 min in 0.3 M oxalic acid at a room temperature. The microstructure and morphology of Al films were characterized by X-ray diffraction, scanning electron microscope and atomic force microscope, respectively. Some hillocks formed at the high target power could be attributed to the grain texture growth in the normal orientation of Al(1 1 1)."

According to the news editors, the research concluded: "The 3D porous AAO structure which is different from the conventional 2D planar one has been successfully demonstrated using HPA on the film with greatly rough hillock-surface formed at the highest power of 185 W. It offers a potential application of the new 3D AAO to high specific surface area devices."

For more information on this research see: Growth of porous anodized alumina on the sputtered aluminum films with 2D-3D morphology for high specific surface area. Applied Surface Science, 2014;309():290-294. Applied Surface Science can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier - www.elsevier.com; Applied Surface Science - www.elsevier.com/wps/product/cws_home/505669)

The news editors report that additional information may be obtained by contacting M.W. Liao, National Cheng Kung University, Center Micro Nano Sci & Technol, Dept. of Mech Engn, Tainan 701, Taiwan (see also Science).

Keywords for this news article include: Tainan, Taiwan, Asia, Aluminum, Light Metals, Science

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Science Letter


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