【航宇大讲堂】Liquid structure in nano-space probed by x-ray scattering methods


报告题目:Liquid structure in nano-space probed by x-ray scattering methods

报告人: Prof. Milena Lippman(Deutsches Elektronen-Synchrotron DESY)

报告时间:2021年6月10日 15:15-18:15

报告地点:Zoom会议室ID:931 4731 9556 密码:chemuser(https://desy.zoom.us/j/93147319556)



In this talk the properties of the condensed matter confined in a nano-space are of interest. Nano confinement provides possibilities towards controlling the structure of condensed matter on a molecular level. Bulk liquids, in comparison to the crystalline matter, exhibit only short-range order. The structural properties of nano-confined liquids significantly differ from their bulk counterpart. In other words, nano-confinement represents a natural control on nano-scale properties of fluids, with relevance to engineering of hybrid materials energy science clean water science, chemistry and biology. However, a fundamental understanding of the properties of confined fluids is still missing. Recent research has shown confinement-induced crystallization and strong modifications of the phase diagram and dynamics, which is different to the bulk and cannot be understood to-date. A large body of theoretical and simulation work as well as micro mechanical, electrical, electro chemical, and optical experiments contributed to understanding of confined fluids and hybrid materials. However, these findings are not supported by experiments sensitive to the atomic scale structure and dynamics. Towards this end, X-ray reflectivity, small-angle and wide angle scattering and diffraction methods with small beams and precision are suitable experimental approaches. Example of different setups applicable with those X-ray techniques are presented.


Milena Lippman currently is the Manager of the User Chemistry Laboratory and the Clean Room facility at PETRA III and FLASH at Deutsches Elektronen-Synchrotron DESY in Hamburg, Germany. She receives her first PhD degree in Sofia University, Bulgaria in 2001 in the field of soft matter bulk materials. During the first PhD work she attended a one-year course focused on Physics of the Polymer Materials at theInstitute of Macromolecular Chemistry, Laboratory of Neutron and X-ray diffraction, Prague, Czech Republic, supported by the UNESCOresearch Program. In 2000 started the second PhD work at RWTH Aachen University, Germany in cooperation with the Science Center Juelich in Germany and DESY. During that time, she was supporting the Wiggler Beamline at the Synchrotron radiation source DORIS in Hamburg, DESY. In 2006 after the defend of the second PhD work, she became a beamline scientist at High-Resolution Diffraction beamlines P08 at PETRA III with focus on planning, building and management of the user chemistry laboratory facilities. Her research interest is in the field ofsoft matter physics in bulk and thin films. In resent year her scientific work is focused on structure and properties of the condensed matter confined in small geometries.