报告题目：Smart Soft Materials and 3D Structures for Biomedical Applications
报告人：徐伟男 博士，Johns Hopkins University, United States
Smart materials refer to those that can significantly change their properties upon applying external stimuli, such as temperature, pH, light, electric or magnetic fields. Among them, the most important category is responsive polymer, which has the capability to change its size, conformation, hydrophobicity at different conditions. Responsive polymers hold great potential in biomedical applications including drug/gene delivery and cell/tissue engineering, due to their ability to interact with biological systems in a precise, dynamic and programmable manner.
This talk presents new multi-responsive polymers with branched architecture, and their controlled assembly into smart 3D microstructures such as microcapsules for advanced drug delivery application. This new type of microcapsules are capable to change their structure and permeability in response to multiple different external stimuli; they can also encapsulate and release multiple different types of cargo molecules in a programmable way.
On the other hand, by introducing responsive polymers to the surface of 2D materials with excellent electrical and mechanical properties, such as graphene, those atomically thin materials can be transformed into well-defined 3D microstructures through self-folding. Such ultrathin graphene 3D microstructures/devices can fold, unfold, interact and communicate at the cellular/subcellular scale, which provide a new and versatile platform for next generation bioelectronics and biosensing.
Weinan Xu （徐伟男） is a postdoctoral fellow in the Department of Chemical and Biomolecular Engineering at Johns Hopkins University since Jan 2016, he received his PhD degree in Materials Science and Engineering from Georgia Institute of Technology in 2015, and his B.S. degree in Polymer Science and Engineering from Donghua University, China (2011).
His current research is focused on stimuli-responsive polymers, 2D nanomaterials, and their hybrids in 3D geometries for applications in biosensing, drug delivery, tissue engineering and energy storage. He has published more than 20 papers in high-impact journals such as Science Advances, ACS Nano, Angewandte Chemie and Macromolecules.
He was recognized with several awards including Excellence in Graduate Polymer Research Award from the American Chemical Society, Best PhD Thesis Award from Sigma Xi, and Postdoctoral Fellow Research & Education Award from Johns Hopkins University.