Dries M, Hettler S, Gamm B, Müller E, Send W, Müller K, Rosenauer A, Gerthsen D
Laboratorium für Elektronenmikroskopie, Karlsruher Institut für Technologie (KIT), Engesserstraße 7, 76131 Karlsruhe, Germany.
Laboratorium für Elektronenmikroskopie, Karlsruher Institut für Technologie (KIT), Engesserstraße 7, 76131 Karlsruhe, Germany.
Ultramicroscopy. 2014 Apr;139:29-37. doi: 10.1016/j.ultramic.2014.01.002. Epub 2014 Jan 25.
Thin-film-based phase-plates are applied to enhance the contrast of weak-phase objects in transmission electron microscopy. In this work, metal-film-based phase-plates are considered to reduce contamination and electrostatic charging, which up to now limit the application of phase-plates fabricated from amorphous C-films. Their crystalline structure requires a model for the simulation of the effect of crystallinity on the phase-plate properties and the image formation process. The model established in this work is verified by experimental results obtained by the application of a textured nanocrystalline Au-film-based Hilbert phase-plate. Based on the model, it is shown that monocrystalline and textured nanocrystalline phase-plate microstructures of appropriate thickness and crystalline orientation can be a promising approach for phase-contrast transmission electron microscopy.
基于薄膜的相位板被应用于增强透射电子显微镜中弱相位物体的对比度。在这项工作中，考虑使用基于金属膜的相位板来减少污染和静电充电，到目前为止，这限制了由非晶碳膜制成的相位板的应用。它们的晶体结构需要一个模型来模拟结晶度对相位板性能和图像形成过程的影响。通过应用基于织构化纳米晶金膜的希尔伯特相位板获得的实验结果验证了这项工作中建立的模型。基于该模型，结果表明，具有适当厚度和晶体取向的单晶和织构化纳米晶相位板微结构可能是相位对比透射电子显微镜的一种有前途的方法。
