论文标题
旋转纳米颗粒的三维相干布拉格成像
Three-dimensional coherent Bragg imaging of rotating nanoparticles
论文作者
论文摘要
Bragg相干衍射成像（BCDI）是一种强大的应变成像工具，通常受到小颗粒和高功率密度的样品不稳定性的限制。在这里，我们设计并验证了适应的衍射体积组件算法，能够从未经控制和未知旋转的粒子中恢复三维数据集。我们将方法应用于在聚焦相干X射线梁的影响下旋转的金纳米颗粒，从而取回其三维形状和应变场。结果表明，可以克服样本不稳定性问题，从而使BCDI的第四代同步加速器源使用其全部潜力。
Bragg Coherent Diffraction Imaging (BCDI) is a powerful strain imaging tool, often limited by beam-induced sample instability for small particles and high power densities. Here, we devise and validate an adapted diffraction volume assembly algorithm, capable of recovering three-dimensional datasets from particles undergoing uncontrolled and unknown rotations. We apply the method to gold nanoparticles which rotate under the influence of a focused coherent X-ray beam, retrieving their three-dimensional shapes and strain fields. The results show that the sample instability problem can be overcome, enabling the use of fourth generation synchrotron sources for BCDI to their full potential.
