Setup for in situ surface investigations of the liquid/glass transition with (coherent) x rays
Setup for in situ surface investigations of the liquid/glass transition with (coherent) x rays
复制标题
使用(相干)X 射线对液体/玻璃化转变进行原位表面研究的设置
DOI:
10.1063/1.1599068
复制
发表时间:
2003
影响因子:
1.6
通讯作者:
W. Press
中科院分区:
文献类型:
--
作者:
T. Seydel;A. Madsen;M. Sprung;M. Tolan;G. Grübel;W. Press
A dedicated setup comprising an efficient cryogenic device for the in situ preparation of large surface areas of prototypical organic glass formers in a wide temperature range (170–340 K) is presented. This setup provides the necessary temperature and vibrational stability for surface x-ray and neutron scattering experiments, including the extremely sensitive technique of x-ray photon correlation spectroscopy (XPCS). XPCS is an emerging method which is made possible by the high coherent photon flux produced by third-generation synchrotrons. We demonstrate that microscopic motion at the surface can be studied in a direct way in the liquid and supercooled state using XPCS. In addition, we have used a charge-coupled-device detector to record two-dimensional images of static speckle patterns forming on surfaces in the glassy state.
DOI:
--
发表时间:
--
期刊:
影响因子:
--
作者:
通讯作者:
--