Combined measurement of X-ray photon correlation spectroscopy and diffracted X-ray tracking using pink beam X-rays
Combined measurement of X-ray photon correlation spectroscopy and diffracted X-ray tracking using pink beam X-rays
复制标题
DOI：
10.1107/s090904951301844x
复制
发表时间：
2013-09-01
影响因子：
2.5
通讯作者：
Amemiya, Yoshiyuki
中科院分区：
文献类型：
--
作者：
Shinohara, Yuya;Watanabe, Akira;Amemiya, Yoshiyuki
对嵌入丁苯橡胶中的炭黑纳米晶体进行 X 射线光子相关光谱 (XPCS) 和衍射 X 射线跟踪 (DXT) 组合测量。根据小角散射区域（XPCS）散斑图案的强度波动，可以获得与平移运动相关的动力学信息，并通过DXT衍射斑位置的变化来观察旋转运动。未硫化丁苯橡胶中的石墨化炭黑纳米晶体在平移运动和旋转运动之间表现出明显的差异；这一结果似乎支持了在纳米胶体系统中广泛观察到的超扩散粒子运动起源的应力松弛模型。使用这两种技术的组合测量将为纳米动力学提供新的见解，并将作为一种微观流变学技术很有用。
Combined X-ray photon correlation spectroscopy (XPCS) and diffracted X-ray tracking (DXT) measurements of carbon-black nanocrystals embedded in styrene-butadiene rubber were performed. From the intensity fluctuation of speckle patterns in a small-angle scattering region (XPCS), dynamical information relating to the translational motion can be obtained, and the rotational motion is observed through the changes in the positions of DXT diffraction spots. Graphitized carbon-black nanocrystals in unvulcanized styrene-butadiene rubber showed an apparent discrepancy between their translational and rotational motions; this result seems to support a stress-relaxation model for the origin of super-diffusive particle motion that is widely observed in nanocolloidal systems. Combined measurements using these two techniques will give new insights into nanoscopic dynamics, and will be useful as a microrheology technique.