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Control and Modification of Nanostructured Materials by Electron Beam Irradiation

机译：电子束辐射对纳米结构材料的控制和改性

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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.
机译：我提出了利用与电子和离子等主动梁的照射的自下而上的技术，以实现尺寸为3-40nm的纳米结构。这可以用作在所需位置提供所需的结构，材料和相位的纳米技术。稳定θ-Al2O3的电子束照射，透射电子显微镜（TEM）中的大于1019 e / cm 2 S，使得可以制造无氧纳米颗粒，其可以被操纵以进行迁移，粘接，旋转，旋转和嵌入。通过从电子到纳米颗粒的动量转移来促进操纵，这利用了TEM极靴的磁场中电子束的螺旋轨迹。此外，通过催化反应诱导非晶碳膜上的洋葱状富勒烯和插层结构。使用电子照射闪光模式在短时间内获得Δ-，θ-Al2O3球/线杂交纳米结构，其在1019和1022 E / cm2s之间切换。还生产各种α-Al2O3纳米结构，例如封装的纳米杆或纳米棒。另外，Pt，W和Cu纳米颗粒的制备或控制可以通过具有更高强度的电子束照射来实现。

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