摘要
X射线小角散射显微层析成像(SAXS-CT)是一种无损的结构表征技术,用于研究非均匀物质纳米结构信息及其空间分布;在上海同步辐射光源(SSRF)设计并搭建了基于Kirkpatrick-Baez(KB)镜聚焦的SAXS-CT成像系统,并选取毛竹和注塑聚乳酸样品进行实验验证。结果表明:该SAXS-CT成像系统的聚焦光斑尺寸可以达到20μm以下;对于毛竹样品,得到了其内部维管束和薄壁细胞的位置分布及散射差异,同时获取了内部纳米纤维的取向特点;对于注塑聚乳酸样品,发现其内部片晶结构具有分层分布特征,获取了片晶结构的分布图像以及长周期分布图像;实验结果验证了该SAXS-CT成像系统的可靠性及实用性。
Small-angle X-ray scattering tomography（SAXS-CT）is a non-destructive structural characterization method for nanostructure analysis of heterogeneous materials and its space distribution.The SAXS-CT system based on micro-focusing Kirkpatrick-Baez（KB）mirrors is developed at Shanghai Synchrotron Radiation Facility（SSRF）.Samples of Phyllostachys edulis and injection-molded polylactic acid are chosen for experimental verification.The results show that the spot size of the SAXS-CT system can be focused below 20μm.For the Phyllostachys edulis sample,the position distribution and scattering difference of vascular bundle and parenchyma cell,and the orientation characteristic of nano-fibers are obtained.For the injection-molded polylactic acid sample,the lamella structure inside the sample exhibits the layered distribution characteristic,and the distribution and long spacing of lamella is acquired.The experimental results confirm the reliability and practicality of the SAXS-CT system.
作者
胡涛
滑文强
王玉丹
王玉柱
周平
洪春霞
边风刚
肖体乔
Hu Tao;Hua Wenqiang;Wang Yudan;Wang Yuzhu;Zhou Ping;Hong Chunxia;Bian Fenggang;Xiao Tiqiao(Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, China;University of Chinese Academy of Sciences, Beijing 100049, China)
出处
《光学学报》
EI
CAS
CSCD
北大核心
2018年第1期384-390,共7页
Acta Optica Sinica
基金
国家重点研发计划(2017YFA0403801
2017YFA0206004)
国家自然科学基金(U1732123
U1232205
11275257
11405260
11405261)
