We demonstrate control over the three-dimensional (3D) structure of suspended 2D materials in a transmission electron microscope. The shape of our graphene samples is measured from the diffraction patterns recorded at different sample tilts while applying tensile strain on the sample carrier. The changes in the shape of the pattern and in individual diffraction spots allow us to analyze both corrugations and strain in the lattice. Due to the significant effect of ripples and strain on the properties of 2D materials, our results may lead to new ways for their engineering for applications.

中文翻译：

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电子显微镜中石墨烯波纹和应变的原位控制

我们展示了在透射电子显微镜中对悬浮2D材料的三维（3D）结构的控制。我们的石墨烯样品的形状是根据在不同样品倾斜度下记录的衍射图样测得的，同时在样品载体上施加拉伸应变。图案形状和各个衍射点的变化使我们能够分析波纹和晶格中的应变。由于纹波和应变对2D材料的性能有重大影响，因此我们的结果可能会为它们的工程应用带来新的方法。