报告题目：Application of small-angle X-ray scattering (SAXS) for structural characterization of materials

报告人： Oleksandr Mykhaylyk 研究员（英国谢菲尔德大学）

邀请人：软物质研究院

报告时间：2019年3月21日（周四）上午10:00

报告地点：软物质研究院（华工北区科技园2号楼）324会议室

欢迎广大师生踊跃参加。

华南软物质科学与技术高等研究院

分子科学与工程学院

2019年3月14日

报告内容简介：

Small-angle X-ray scattering is a non-destructive methods conveniently designed for structural characterization of materials from nano- to micron scales. Recent developments of X-ray optic components, synchrotron radiation sources and laboratory SAXS instruments, complimented by a further progress in modelling and analysis, made SAXS technique one of the most reliable (and popular) for structural characterization of soft-matter materials. Moreover, further innovations in X-ray beam generation leading to a construction of high brilliance X-ray sources opened up a possibility to bring laboratory SAXS instruments to another level of capability which was achievable, until recently, only at synchrotron sources. These advances significantly expanded applications of laboratory SAXS instruments and provided more flexibility for in-house measurements which can be carried out on a wide range of materials at different processing conditions. A few SAXS case studies will be presented. In particular, an application of reciprocal space models and real space models together with contrast variation techniques for structural characterization of nanoparticles and colloidal systems will be demonstrated. Examples of time-resolved SAXS measurements of flow-induced crystallisation of semi-crystalline polymers, SAXS analysis of structural orientation of block-copolymers under large-amplitude oscillatory shear, time-resolved measurements of polimerization-induced self-assembly of copolymers during chemical reactions and thermally-induced morphological transformations of self-assembled block-copolymers as well as garzing-incidence X-ray scattering of crystallization kinetic of the organolead halide perovskites (photovoltaics used for solar cells) will be given.

报告人简介：

Oleksandr Mykhaylyk研究员现担任英国谢菲尔德大学软物质分析实验室（Soft Matter AnalyticaL Laboratory （SMALL）, University of Sheffield）主管（Head）；同时现任华南理工大学客座教授（Guest Professor）。Mykhaylyk研究员的研究方向主要集中在衍射/散射技术用于材料结构表征方面。他擅长可见光、中子、X光衍射/散射，包括小角光散射、小角中子散射、X光衍射和单晶衍射。在此领域20多年的学习和工作使他涉足各类软、硬材料的结构分析，包括如金属、混凝土、超硬材料等硬物质，以及高分子、胶束、胶体、液晶等软物质。他的研究兴趣主要是软物质的结构表征，特别是使用可见光、中子、X光衍射/散射技术。他至今已经发表了80多篇论文，包括J. Am. Chem Soc., Adv. Mater., Macromolecules, Langmuir等众多材料和高分子科学领域的权威期刊，其中有8篇J. Am. Chem Soc.是一作或通讯作者。Mykhaylyk研究员目前其所获的科研经费已超过288万英镑，其经费来源包括学术界的英国工程与物理科学研究委员会基金项目（EPSRC），英国科学与技术设施委员会（STFC），劳埃德TSB集团，和工业界的 Unilever and AkzoNobel。他是欧洲同步辐射装置（European Synchrotron Radiation Facilities）和英国同步辐射装置（Diamond Light Source）评审委员会委员。他同时担任谢菲尔德大学研究生课程和欧洲暑期培训班的课程的教学工作，主要讲授中子、X光散射。