New Electrostatic Phase Plate for Phase-Contrast Transmission Electron Microscopy and Its Application for Wave-Function Reconstruction
New Electrostatic Phase Plate for Phase-Contrast Transmission Electron Microscopy and Its Application for Wave-Function Reconstruction
复制标题
新型相衬透射电镜静电相位板及其在波函数重建中的应用
DOI：
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发表时间：
2010
影响因子：
2.8
通讯作者：
D. Gerthsen
中科院分区：
文献类型：
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作者：
K. Schultheiss;J. Zach;B. Gamm;Manuel Dries;N. Frindt;R. Schröder;D. Gerthsen
摘要介绍了一种新型的透射电子显微镜用静电相位板。相位板由一个单一的微同轴电缆状杆与其电极暴露于未衍射电子。出现的场用于相对于衍射电子移动未衍射电子的相位。该设计克服了Boersch相位板空间频率阻塞环形电极的缺点。首先，实验相衬图像呈现为PbSe和Pt纳米颗粒具有明显变化的相衬，这取决于所施加的电压和所产生的未散射电子的相移。与新的相位板的设计，我们第一次展示了重建的对象波函数的基础上一系列的只有三个实验相衬TEM图像与静电相位板获得。
Abstract A promising novel type of electrostatic phase plate for transmission electron microscopy (TEM) is presented. The phase plate consists of a single microcoaxial cable-like rod with its electrode exposed to the undiffracted electrons. The emerging field is used to shift the phase of the undiffracted electrons with respect to diffracted electrons. The design overcomes the drawback of the spatial frequency-blocking ring electrode of the Boersch phase plate. First, experimental phase-contrast images are presented for PbSe and Pt nanoparticles with clearly varying phase contrast, which depends on the applied voltage and resulting phase shift of the unscattered electrons. With the new phase-plate design, we show for the first time the reconstruction of an object wave function based on a series of only three experimental phase-contrast TEM images obtained with an electrostatic phase plate.