Wide field of view crystal orientation mapping of layered materials

The data sets and the processing script (jupyter notebooks) are part of the publication "Wide field of view crystal orientation mapping of layered materials". The programming language used to process the data is written with python 3. The full manuscript can be found at: https://arxiv.org/abs/2011.01875 The experiments were performed on a JEOL JSM-5110 SEM at 20kV. The direct electron detector used  was minipix camera of Advacam. In the notebooks, the data processing of the different 4D-STEM dataset is performed using the pixstem library and some self written packages.  At the end of the processing, information on orientation, strain and multilayers of 2D materials (graphene, graphene oxide and MoS2) is retrieved. For the orientation mapping, the grain boundaries and average grain orientation are identified where due to the large field of view a large number of statistics on the grains is retrieved.  Dataset 1: 512x512 scan of graphene with a field of view of 3600 um2  Dataset 2: 1024x1024 scan of graphene with a field of view of  0.112 mm2  Dataset 3: 512x512 scan of MoS2 with a field of view of 2.36 mm2 Dataset 4: 82x60 scan of graphene oxide, this is a small dataset and can be used to get familiar with  the type of data processing.

该数据集及其处理脚本（Jupyter笔记本）构成了出版物《层状材料广角视野晶体取向映射》的组成部分。数据处理所采用的编程语言为 Python 3。完整的手稿可查阅于：https://arxiv.org/abs/2011.01875。实验在 JEOL JSM-5110 扫描电子显微镜上，以 20kV 的电压进行。所使用的直接电子探测器为 Advacam 的 minipix 相机。在笔记本中，通过 pixstem 库及一些自编包对不同的 4D-STEM 数据集进行数据处理。在处理结束时，提取了关于二维材料（石墨烯、氧化石墨烯和 MoS2）的取向、应力和多层结构的信息。对于取向映射，识别了晶界和平均晶粒取向，由于视场范围宽广，收集了大量关于晶粒的统计数据。数据集 1：石墨烯的 512x512 扫描，视场范围为 3600 μm²；数据集 2：石墨烯的 1024x1024 扫描，视场范围为 0.112 mm²；数据集 3：MoS2 的 512x512 扫描，视场范围为 2.36 mm²；数据集 4：氧化石墨烯的 82x60 扫描，这是一个小型数据集，可用于熟悉数据处理类型。