题 目：Colloidal
Particles at the Liquid-Liquid Interfaces
主讲人：To NGAI (魏涛)（香港中文大学教授）
时 间：2018年4月3日（周二）上午10:00
地 点：化学馆321报告厅
Abstract: The phenomenon of
adsorption of colloidal particles at interfaces to stabilize the emulsions has been known for more
than a century. Today, particle-stabilized emulsions, or so-called Pickering
emulsions have been finding increasing attention in the scientific and industrial
communities. However, our fundamental understanding of the connection between
particle properties and emulsion characteristics is still surprisingly poor.
This presentation will summarize the general principles used in the assembly of
colloidal particles at a range of liquid-liquid interfaces. In particular, I
will discuss the physical behavior of colloidal particles trapped at the
interfaces and address that Pickering emulsions can serve as a template for the
fabrication of novel functional materials which will have a great potential for
applying in a variety of applications.
About the Speakers: To NGAI has
received his B.S. in chemistry at the Chinese University of Hong Kong (CUHK) in
1999. In 2003, he obtained his Ph.D. in chemistry in the same university under
the supervision of Professor Chi Wu. He moved to BASF (Ludwigshafen, Germany)
in 2003 as the postdoctoral fellow for two years in Dr. Helmut Auweter and Dr.
Sven-Holger Behrens’s research group. In 2005, he went to Professor Timothy P
Lodge’s group in the Chemistry Department of the University of Minnesota as
postdoc and then joined the Chemistry Department at CUHK in 2006 as a research
assistant professor. He has been appointed as an assistant professor in 2008,
and early promoted to associate professor in 2012. In 2017, he was promoted to
Professor. His research interests center on various areas of surface and
colloid science. He focuses on the design and study the particle behaviour at
the fluid interfaces through combination of colloid science, polymer chemistry
and soft matter physics. He also focuses on the developing and applying
single-particle force microscopy, total internal reflection microscopy (TIRM),
and active single-particle microrheometer, to measure the intermolecular and
surface forces as well as viscoelastic properties of soft materials.
