【9th.Apr.】 Hidden pathways in molecular and colloidal self-assembly revealed through the development of in situ characterization methods
日期：2019-04-09
閱讀：1332
題目： Hidden pathways in molecular and colloidal self-assembly revealed through the development??of in situ characterization methods
報(bào)告人： 王宇博士，加州大學(xué)伯克利分校， 美國(guó)
時(shí)間： 2019年4月9日下午2：00
地址：? 化學(xué)A樓526演講廳
邀請(qǐng)人：? 車順愛 教授
內(nèi)容摘要：
Molecular and colloidal self-assembly has been recognized as an important “bottom-up” approach to constructing functional materials and self-organized systems for various applications.?
An understanding of the self-assembly pathways is significant for designing routes to the desired structures and the emergence of novel properties.?
However, it remains a great challenge to unveil the hidden pathways and translate states during self-assembly due to the difficulty of in situ characterizations, especially in complex hierarchical and/or multi-component systems.?
In this talk, we report our developments on in situ characterization methods and their effectiveness in revealing the hidden pathways during molecular and colloidal self-assembly.?
For instances, using in situ combined spectroscopies, we elucidate the transient structures during the self-assembly of organic cages and provide deep insights into the chiral amplification in multi-component supramolecular systems.?
Through a variety of in situ studies on molecular assembly, we discover and establish a new assembly mode that we name catalyzed assembly (catassembly) for its resemblance to catalysis.?
Finally, we highlight our discovery of the dynamic deformation of individual PbSe nanocrystals during colloidal assembly into superlattice through in-situ liquid-phase TEM.?
We show an unprecedented phenomenon that inorganic semiconductors are “soft materials” at the nanoscale. The discovery is significant not only for the designing of nanocrystals and nanocrystal architectures with desired properties for various applications, but also for controlling the physical and chemical processes of a wide range of matter at the atomic or nanometric level.
報(bào)告人簡(jiǎn)介：
王宇博士? 于2009年畢業(yè)于南京大學(xué)基礎(chǔ)學(xué)科強(qiáng)化部獲得化學(xué)學(xué)士學(xué)位，于2016年畢業(yè)于廈門大學(xué)化學(xué)系獲得博士學(xué)位。2016年5月至2017年8月在美國(guó)阿克倫大學(xué)從事博士后研究。2017年8月至今在美國(guó)加州大學(xué)伯克利分校從事博士后研究。長(zhǎng)期從事分子與納米粒子可控組裝的方法學(xué)發(fā)展以及組裝原位表征技術(shù)發(fā)展。利用原位光譜、原位X射線衍射、原位透射電子顯微鏡研究小分子、高分子、生物大分子、金屬或半導(dǎo)體納米粒子的組裝行為和組裝產(chǎn)物功能。已發(fā)表SCI論文15篇，其中以第一/共同第一作者或通訊作者發(fā)表論文9篇，包括三篇Nature Commun.以及 Chem. Soc. Rev.、JACS等頂級(jí)刊物。
