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A novel SAXS/XRD/XAFS combined technique for in-situ timeresolved simultaneous measurements

查看全文 作　　者：Zhonghua [1,2]Wu;Yunpeng [1]Liu;Xueqing [1]Xing;Lei [1]Yao;Zhongjun [1]Chen;Guang [1]Mo;Lirong [1]Zheng;Quan [1]Cai;Hao [1,2]Wang;Jiajun [1,2]Zhong;Yuecheng [1,2]Lai;Lixiong [1,2]Qian 高影响力作者 机构地区：[1]Beijing Synchrotron Radiation Facility,Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China;[2]University of Chinese Academy of Sciences,Chinese Academy of Sciences,Beijing 100049,China高影响力机构 出　　处：《Nano Research》索引2023年第16卷第1期,共9页高影响力期刊 基　　金：This work was supported by the National Key Research and Development Program of China(Nos.2017YFA0403000 and 2017YFA0403100). 摘　　要：Synchrotron radiation based combined technique can provide multiple structural information simultaneously,which is an important development direction of structural detection.In this study,a novel small-angle X-ray scattering/X-ray diffraction/X-ray absorption fine structure(SAXS/XRD/XAFS)combined setup was constructed,where an area detector,a curved detector,and a point detector are,respectively,used for the measurements of SAXS,XRD,and XAFS signals.A detailed description about the combined setup was given.A minitype diamond detector coupled to a SAXS beamstop was used to record the transmitted X-ray intensity,making the scattering(SAXS and XRD)signal measurement compatible with the absorption(XAFS)signal measurement,avoiding mechanical switching.The two-way sampling strategy was used to acquire XAFS signals,shortening the non-counting time.The two-way and one-way sampling strategies were discussed.High-frequency sampling scheme was used to collect experimental signals,improving the measurement efficiency and signal-to-noise ratio.A detailed description and discussion about the high-frequency scheme were also given in this paper.Except the rotation of monochromator,there is no mechanical movement in measurements,time resolution may reach the level of seconds.Using this SAXS/XRD/XAFS combined setup,SAXS,XRD,and XAFS signals can be acquired simultaneously.With some in-situ sample environment system,the newlydeveloped combined technique can be used to track the structure evolution in complex fluids.During the formation processes of(BiO)2CO3 and ZnAPO-34 particles,the changes of in-situ experimental data with reaction time demonstrate that SAXS/XRD/XAFS combined technique is feasible to track the dynamic process. 关 键 词：SAXS/XRD/XAFS combined technique IN-SITU time-resolution
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