腾讯会议ID：234-323-086

会议密码：0715

主持人：李冬梅 研究员

联系人：傅琦 (fuqi@iphy.ac.cn)

Abstract：

Chirality is more than a molecular label: it can emerge through symmetry breaking, be stabilized by collective organization, and govern material properties across multiple length scales. In this talk, I will present my efforts to understand and harness chirality in nanostructured materials and perovskite optoelectronics. I will first introduce our studies of spontaneously chiral nanoparticles, in which achiral building blocks evolve into chiral assemblies through emergent symmetry breaking. These systems provide a platform for investigating how chiral states are generated, selected, and locked in, and how nanoscale chirality can be translated into optical and functional responses. Building on this foundation, I will then discuss enantiomeric packing at perovskite heterointerfaces. Rather than treating enantiomers as interchangeable mirror images, we explore how homochiral and heterochiral configurations give rise to distinct packing motifs, intermolecular cohesion, and interfacial energy landscapes. Such differences can influence molecular ordering, interfacial mechanics, and degradation pathways in perovskite-based devices. These studies suggest that chirality is not merely an additional molecular functionality, but a versatile design parameter for controlling symmetry breaking, molecular packing, interfacial mechanics, and degradation kinetics in functional materials. I will conclude by discussing how this enantiomeric perspective may open broader opportunities for the design of robust materials and optoelectronic technologies.

Brief CV of Dr. Tianwei Duan：

Tianwei Duan is an Assistant Professor in the Department of Materials Science and Engineering at City University of Hong Kong. She received her Bachelor’s and Master’s degrees in Chemistry from Tongji University in 2012 and 2015, and completed her PhD in Chemistry at Shanghai Jiao Tong University in 2021 under the supervision of Prof. Shunai Che, where she developed chiral semiconductor nanocrystals. From 2021 to 2024, she was an RGC-funded Postdoctoral Research Fellow at Hong Kong Baptist University, working with Prof. Yuanyuan Zhou on chiral perovskite materials for energy devices. Before joining CityUHK, she served as a Research Assistant Professor in the Department of Chemical and Biological Engineering at the Hong Kong University of Science and Technology. She holds two patents, has contributed two book chapters, and has published 16 papers as first or corresponding author in leading journals including Science, Nature Reviews Clean Technology, Chem, Advanced Energy Materials, and ACS Energy Letters.