报告题目：Site-Specific Colloidal Synthesis

报 告 人：Chen Hongyu

报告时间：2016年6月2日 上午9:00

报告地点：无机超分子楼报告厅二楼

报告摘要：

Nanosynthesis is an emerging field studying the creation of nanostructures. Despite tremendous progress, the synthetic capabilities are still largely limited to simple component and symmetrical nanocrystals. The first part of this talk will give an overview on the research activities in the Chen Group, where various complex nanostructures may find unexpected application via collaborations. The second part will focus on the mechanisms of growing specific structures onto colloidal nanoparticles, leading to our recent discoveries. Going beyond individual shapes, additional growth of a shaped domain onto an existing structure would enable arbitrary structural manipulation towards tailored nano-hybrids. In this talk, I will discuss a method to maintain a ligand-deficient “fresh” surface to confine the site of growth in a colloidal system. With the symmetry broken, Ag nanowire and triangular prism are sequentially grown from a colloidal Au seed with well-defined shapes. Our ability in the dynamic control of “fresh” and “old” surfaces allows selective growth at a single site/direction, thus opening doors to sophisticated synthetic designs and broadening the horizon of our search for synergistic effects and functional architectures.

报告人简介:

 Dr. Hongyu Chen obtained his B. Sc. from University of Science and Technology of China (USTC) in 1998. He then moved to Yale University and studied Mn complexes and water oxidation chemistry under the guidance of Gary Brudvig and Robert Crabtree. After obtaining his Ph.D. degree in 2004, he worked as a post-doctoral fellow with Carl Batt in Cornell University on the topic of protein-nanoparticle hybrids. In 2006, he joined the Division of Chemistry and Biological Chemistry in Nanyang Technological University in Singapore, where he is currently an Associate Professor and Associate Dean. His main research interest is in the development of new synthetic methodologies for nanostructures and the underlying mechanisms.