共查询到16条相似文献,搜索用时 93 毫秒
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我们在铝衬底上制作了不同参数条件下的阳极氧化铝(AAO)模板.通过改变初次阳极化时间来得到不同尺寸的纳米孔.改变初次阳极化时间可容易地调节,而使用刻蚀技术又可以控制氧化铝孔的长度.在该研究中,控制阳极极化和刻蚀参量成功地制备了不同直径和不同长度的AAO纳米孔.在AAO模板的竖直沟道中生长了方向性强的碳纳米管,而AAO纳米孔的直径和长度可以控制这一过程.通过二次阳极极化法制备了有着六边形孔洞排列方式的纳米AAO模板.由于AAO纳米孔的直径和长度依赖于阳极化参量,故通过控制阳极化参量就可控制AAO纳米孔的直径和长度. 相似文献
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利用二次阳极氧化法制备多孔氧化铝(AAO)模板,然后用NaOH、磷铬酸和不同质量分数的H3PO4等溶液,对AAO模板进行湿法刻蚀.研究了刻蚀时间与AAO模板质量减少之间的变化关系.结果表明,质量分数为3%的H3PO4溶液是最为温和的刻蚀荆,它在刻蚀过程中AAO模板的质量减少跟刻蚀时间呈较好的线性关系.SEM测试表明,刻蚀后的AAO模板表面存在大量的氧化铝纳米线,它们是在刻蚀的过程中产生的,并影响着刻蚀速率.通过调节刻蚀时间,可实现对AAO模板的精确可控刻蚀,这对制备纳米器件具有重要意义. 相似文献
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采用一次阳极氧化法,通过电解P型<100>晶向Si衬底上的高纯Al膜,在40V下,0.3M草酸中制备了Si基anodic aluminum oxide(AAO)模板。在Si基Al氧化过程中,通过电流密度随时间实时变化曲线的分析,研究了Si基AAO的生长机理。实验发现,电解液温度对Si基AAO制备的影响很大,在30℃下的氧化速度是在10℃下的5倍多。 相似文献
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在金属衬底上外延生长Ⅲ族氮化物及相关器件 总被引:2,自引:0,他引:2
通过分析对比蓝宝石衬底和金属衬底上外延生长Ⅲ族氮化物及相关器件的优缺点,指出了金属所具有的独特优异的物理及化学性能,以及金属作为衬底外延生长Ⅲ族氮化物及相关器件的重大意义。详细介绍了国内外在金属衬底上外延生长Ⅲ族氮化物及相关器件的研究状况及所发展的相关外延技术。相比金属有机物气相沉积技术和分子束外延技术,脉冲激光沉积技术可以实现Ⅲ族氮化物的低温外延生长,从而克服金属有机物气相沉积技术和分子束外延技术采用的高温生长而导致金属衬底与外延薄膜间发生的剧烈界面反应,可以直接在金属衬底上外延生长Ⅲ族氮化物及相关器件。脉冲激光沉积技术为在金属衬底上外延生长Ⅲ族氮化物及相关器件开拓了广阔的前景。 相似文献
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In this study, the high density nano-pillar type phase change memory was fabricated using duplicating nano-patterns of the anodic alumina oxide (AAO) by nanoimprint process. The high density nano-hole array of AAO template was transferred to the flexible PVC polymer template using hot embossing method. To use the flexible AAO shaped template for UV-NIL, the high density nano-pillar type Ge2Sb2Te5 patterns were fabricated, and the electrical properties of the device were evaluated by conducting atomic force microscopy, connected electrical measurement system. To use the flexible AAO shaped template for UV-NIL, high density GST pattern could be fabricated even on the flexible polyimide (PI) substrate. 相似文献
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This paper presents a cost-effective method to fabricate tapered sub-wavelength structures (SWSs) on the polycarbonate (PC) film using gas-assisted hot embossing with anodic aluminum oxide (AAO) template. The AAO template with array of high-aspect-ratio submicron holes was fabricated using a two-step anodization process. The soften polymer is then pressurized by gas to fill deep into the nano-holes, tapered SWSs could be generated by directly separating the PC film from AAO template during the de-molding process. The heights were up to about 260 nm. The fabricated PC film reduces the reflectivity from 8.9% in a bare film to 2% with tapered SWSs at the wavelength of 550 nm. The AAO template can be used repeatedly. 相似文献
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Weimin Zhou Xiaoming Niu Guoquan Min Zhitang Song Jing Zhang Yanbo Liu Xiaoli Li Jianping Zhang Songling Feng 《Microelectronic Engineering》2009,86(12):2375-2380
High-density ordered arrays of h-PDMS nanopillars were fabricated using an anodic aluminium oxide (AAO) template. The pore diameter and the interpore distance of the replica h-PDMS molding are well consistent with that of AAO template. The inverse h-PDMS has the surface characteristic of hydrophobic and surface energy of 130°. Hexagonally arranged array can be obtained by UV-nanoimprint lithography using our proposed h-PDMS mold, and their morphologies can be transferred truly. Besides, the h-PDMS mold has been used to fabricate photonic crystal structure on GaN by nanoimprint process, which could be found an application in the light output of GaN LED. 相似文献
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Wei-Yi ChangJing-Tang Wu Kai-Heng LinSen-Yeu Yang Kuang-Li LeePei-Kuen Wei 《Microelectronic Engineering》2011,88(6):909-913
This paper reports a novel and effective method for the fabrication of gold sub-wavelength pore array using gas-assisted hot embossing. The novel fabrication comprises the fabrication of AAO template with high order pore array, sputter-coating of gold and gas-assisted hot embossing. AAO template is fabricated by a two-step anodization process. It is then coated with gold (100 nm thick). The gold sub-wavelength pore array is finally formed by using gas-assisted hot embossing process. The transmission spectra of gold sub-wavelength pore array are measured in several conditions such as air, water and glycerol/water mixture. The detection shows significant shift in the wavelength of resonance peak. The gold sub-wavelength pore array can be employed as optical biosensors. 相似文献