电子束辐照对纳米结构材料的控制与改性

IF 1.3 Q3 INSTRUMENTS & INSTRUMENTATION
S. Tanaka
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引用次数: 1

摘要

我提出了一种自下而上的技术,利用电子和离子等有源光束照射,实现3-40纳米尺寸的纳米结构。这可以作为一种纳米技术,在所需的位置提供所需的结构、材料和相。在透射电子显微镜(TEM)下,亚稳θ-Al2O3的电子束照射超过1019 e/cm2,可以产生无氧化物的Al纳米颗粒,可以操纵其进行迁移,成键,旋转,旋转和嵌入。利用电子束在TEM极片磁场中的螺旋轨迹,从电子到纳米粒子的动量传递促进了操作。此外,还通过催化反应在非晶碳膜上生成了洋葱状富勒烯和插层结构。采用1019 ~ 1022 e/cm2s的电子辐照闪烁模式,在短时间内获得了δ-, θ-Al2O3球/线杂化纳米结构。各种α-Al2O3纳米结构,如包封的纳米球或纳米棒,也被生产出来。此外,可以通过更高强度的电子束辐照来制备或控制Pt、W和Cu纳米粒子。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Control and Modification of Nanostructured Materials by Electron Beam Irradiation
I have proposed a bottom-up technology utilising irradiation with active beams, such as electrons and ions, to achieve nanostructures with a size of 3–40 nm. This can be used as a nanotechnology that provides the desired structures, materials, and phases at desired positions. Electron beam irradiation of metastable θ-Al2O3, more than 1019 e/cm2s in a transmission electron microscope (TEM), enables the production of oxide-free Al nanoparticles, which can be manipulated to undergo migration, bonding, rotation, revolution, and embedding. The manipulations are facilitated by momentum transfer from electrons to nanoparticles, which takes advantage of the spiral trajectory of the electron beam in the magnetic field of the TEM pole piece. Furthermore, onion-like fullerenes and intercalated structures on amorphous carbon films are induced through catalytic reactions. δ-, θ-Al2O3 ball/wire hybrid nanostructures were obtained in a short time using an electron irradiation flashing mode that switches between 1019 and 1022 e/cm2s. Various α-Al2O3 nanostructures, such as encapsulated nanoballs or nanorods, are also produced. In addition, the preparation or control of Pt, W, and Cu nanoparticles can be achieved by electron beam irradiation with a higher intensity.
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来源期刊
CiteScore
2.80
自引率
28.60%
发文量
27
审稿时长
11 weeks
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