Spontaneous formation of virus-like structures in soft anisotropic colloids
报告题目：Spontaneous formation of virus-like structures in soft anisotropic colloids
报告人：Willem Kegel(Van ’t Hoff Laboratory, Debye Research Institute, Utrecht University, Utrecht, The Netherlands)
报告摘要：In this talk I will present recent progress in the creation and structure formation of several kinds of ‘patchy’ colloids with various shapes and interactions between them. I will focus on recent experimental findings using colloids with soft (‘floppy’) layers and broken symmetry. The soft layers deform at short distance between the particles, giving rise to directional bonds that in turn lead to low-dimensional structures such as bubbles, sheets and shells. We developed a simple computational model that globally reproduces the experimental observations. Yet, several questions remain and will be addressed.
(1)D.J. Kraft, R. Ni, F. Smallenburg, M. Hermes, K. Yoon, D.A. Weitz, A. van Blaaderen, J. Groenewold, M. Dijkstra, and W.K. Kegel, Surface roughness directed self-assembly of patchy particles into colloidal micelles”, PNAS 109, 10787, (2012)
(2) C.H.J. Evers, J.A. Luiken, P.G. Bolhuis and W.K. Kegel, ‘Self-assembly of Microcap- sules via Colloidal Bond Hybridization and Anisotropy’, Nature 534, 364, (2016)
2011 – 2013 Head department of chemistry at Utrecht University
2006 - Full professor at the van't Hoff Laboratory, Utrecht University. Chair title: Self-organizing systems.
1999 – 2006 Associate Professor (UHD) at the van't Hoff Laboratory, Utrecht University
1996 – 1999 Fellow with the Royal Netherlands Academy of Arts and Sciences (KNAW-Fellow)
1994 – 1996 Postdoctoral Research Associate with Prof. Howard Reiss at the University of California, Los Angeles (UCLA)
1989 – 1993 PhD in Physical Chemistry, Utrecht University.
Prof. W. K. Kegel is interested in the mechanisms that govern the spontaneous formation of ordered structures from building blocks that vary in size from Angstroms to microns. The work in his group mainly focuses on colloids. Inspired by the rich complexity in biology, they have developed and studied new colloidal model systems in which both the geometry of the colloids and the orientation dependent interactions between them can be tuned. These particles are referred to as ‘patchy colloids’. The goal is to pin down the essential properties of these types of building blocks in the form of well-defined patchy colloids. The purpose of their work is to design building blocks that form new and unique materials with interesting structural, optical, mechanical and /or electronic properties.