学术报告

题目: “Polymerization” of Nanoparticles in Colloidal Solutions

报告人： 陈虹宇博士 南洋理工大学化学与生物化学系副教授

时间：2012年11月9日上午10:30

地点：化学馆241

Chen Hongyu 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. After obtaining his Ph.D. degree in 2004, he worked as a post-doctoral fellow 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. His main research interest is in the development of new synthetic methodologies for nanostructures. Like traditional chemical synthesis, the assembly of nano-objects is of fundamental importance. We developed polymer/silica encapsulation as means to trap the “reaction” intermediates of nanoparticle aggregation. This allowed us to explore the underlying aggregation mechanisms. By tuning aggregation conditions, linear aggregates of gold nanoparticles are obtained as kinetically controlled products, whereas globular aggregates are obtained as thermodynamically controlled products.

References：

[1] X. Wang, G. Li, T. Chen, M. Yang, Z. Zhang, T. Wu*, H. Chen*, Nano Lett., 2008, 8, 2643-2647.

[2] G. Chen, Y. Wang, L. H. Tan, M. Yang, L. S. Tan, Y. Chen, H. Chen*, J. Am. Chem. Soc., 2009, 131(12), 4218-4219.

[3] G. Chen, Y. Wang, M. Yang, J. Xu, S. J. Goh, M. Pan, H. Chen*, J. Am. Chem. Soc., 2010, 132 (11), 3644-3645.

[4] Y. Wang, G. Chen, M. Yang, G. Silber, S. Xing, L. H. Tan, F. Wang, Y. Feng, X. Liu, S. Li, H. Chen*, Nat. Commun., 2010, 1, 87.

[5] Y. Feng, J. He, H. Wang, Y. Y. Tay, H. Sun, L. Zhu, H. Chen*, J. Am. Chem. Soc., 2012, 134(4), 2004-2007.

[6] H. Wang, L. Chen, X. Shen, L. Zhu, J. He, H. Chen*, Angew. Chem.-Int. Ed., 2012, 51(32), 8021-8025.