首页> 外文期刊>Journal of synchrotron radiation >Simultaneous measurement of X-ray specular reflection and off-specular diffuse scattering from liquid surfaces using a two-dimensional pixel array detector: The liquid-interface reflectometer of BL37XU at SPring-8
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Simultaneous measurement of X-ray specular reflection and off-specular diffuse scattering from liquid surfaces using a two-dimensional pixel array detector: The liquid-interface reflectometer of BL37XU at SPring-8

机译:使用二维像素阵列检测器同时测量液体表面的X射线镜面反射和镜面反射散射:SPring-8上BL37XU的液界面反射仪

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摘要

An X-ray reflectometer for simultaneous measurement of specular and off-specular reflection of liquid surfaces is described. The reflectometer, equipped with a two-dimensional single X-ray photon-counting pixel array detector obtained the full range of X-ray specular and off-specular reflections in an extremely short time (1 s). Both the specular and off-specular reflection of water exhibited good agreement with the predicted capillary-wave theory within the appropriate instrumental resolution. The approach is also demonstrated on an aqueous solution of 1-dodecyl-3-methylimidazolium chloride. The monolayer in which the dodecyl chain faces upwards and the Cl~- anion locates next to the imidazolium ring formed on the water surface was found to be laterally homogeneous. The use of a pixel array detector will be particularly powerful for in situ measurements to investigate both out-of-plane and in-plane structures simultaneously, not only for liquid surfaces but also for other thin films.
机译:描述了用于同时测量液体表面的镜面反射和镜面反射的X射线反射仪。配备了二维单X射线光子计数像素阵列检测器的反射仪在极短的时间内(1 s)获得了所有X射线镜面反射和镜外反射。在适当的仪器分辨率内​​,水的镜面反射和镜外反射都与预测的毛细管波理论显示出良好的一致性。该方法还在1-十二烷基-3-甲基咪唑鎓氯化物的水溶液上得到证明。发现其中十二烷基链面向上并且Cl-阴离子紧邻在水表面上形成的咪唑环的单层在横向上是均匀的。像素阵列检测器的使用对于现场测量特别有用,可同时研究平面外和平面内结构,不仅适用于液体表面,而且适用于其他薄膜。

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