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用于X射线纳米计算机断层扫描的几何优化样本的激光制备

Laser-preparation of geometrically optimised samples for X-ray nano-CT.

作者信息

Bailey J J, Heenan T M M, Finegan D P, Lu X, Daemi S R, Iacoviello F, Backeberg N R, Taiwo O O, Brett D J L, Atkinson A, Shearing P R

机构信息

Department of Chemical Engineering, University College London, London, U.K.

Department of Earth Sciences, University College London, London, U.K.

出版信息

J Microsc. 2017 Sep;267(3):384-396. doi: 10.1111/jmi.12577. Epub 2017 May 15.

DOI:10.1111/jmi.12577
PMID:28504417
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6849567/
Abstract

A robust and versatile sample preparation technique for the fabrication of cylindrical pillars for imaging by X-ray nano-computed tomography (nano-CT) is presented. The procedure employs simple, cost-effective laser micro-machining coupled with focused-ion beam (FIB) milling, when required, to yield mechanically robust samples at the micrometre length-scale to match the field-of-view (FOV) for nano-CT imaging. A variety of energy and geological materials are exhibited as case studies, demonstrating the procedure can be applied to a variety of materials to provide geometrically optimised samples whose size and shape are tailored to the attenuation coefficients of the constituent phases. The procedure can be implemented for the bespoke preparation of pillars for both lab- and synchrotron-based X-ray nano-CT investigations of a wide range of samples.

摘要

本文介绍了一种用于制造圆柱状支柱的强大且通用的样品制备技术，该支柱用于通过X射线纳米计算机断层扫描（nano-CT）进行成像。该方法采用简单、经济高效的激光微加工，并在需要时结合聚焦离子束（FIB）铣削，以在微米长度尺度上制备出机械性能良好的样品，以匹配纳米CT成像的视野（FOV）。作为案例研究展示了各种能源和地质材料，证明该方法可应用于多种材料，以提供几何形状优化的样品，其尺寸和形状根据组成相的衰减系数进行定制。该方法可用于为基于实验室和同步加速器的广泛样品的X射线纳米CT研究定制制备支柱。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/5f05/6849567/b06e4db8f6bf/JMI-267-384-g011.jpg
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