用于相位重建的电子傅里叶叠层成像
Electron Fourier ptychography for phase reconstruction
AI总结:
本文提出电子傅里叶叠层成像方法,结合改进迭代相位恢复算法与替代光学几何采集数据,在低电子注量下实现Cry11Aa蛋白晶体的高分辨相位重建,且无需硬件改造。
摘要:
相位重建在透射电子显微镜的结构研究中十分重要。本文介绍了电子傅里叶叠层成像,并将其应用于抗辐射材料和对电子束敏感材料的相位重建。研究表明,利用在替代光学几何结构中采集的数据,并采用改进的迭代相位恢复算法,可以高分辨率重建出射波的相位。该方法在低温条件下对Cry11Aa蛋白晶体进行验证,在4.5×10^2 e^-/nm^2的电子注量下实现了0.63 nm的空间分辨率。值得注意的是,该方法无需额外的硬件改造,实施简单,并可与现有数据采集软件无缝集成,为结构研究提供了一种广泛可用的替代方法。
英文摘要:
Phase reconstruction is important in transmission electron microscopy for structural studies. We describe electron Fourier ptychography and its application to phase reconstruction of both radiation-resistant and beam-sensitive materials. We demonstrate that the phase of the exit wave can be reconstructed to high resolution using a modified iterative phase retrieval algorithm using data collected in an alternative optical geometry. This method achieves a spatial resolution of 0.63 nm at a fluence of $4.5 \times 10^2 \, e^-/\text{nm}^2$, as validated on Cry11Aa protein crystals under cryogenic conditions. Notably, this method requires no additional hardware modifications, is straightforward to implement, and can be seamlessly integrated with existing data collection software, providing a broadly accessible alternative approach to structural studies.
机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。