Division/Committee: [COLL] Division of Colloid & Surface Chemistry

For numerous chemical and biological systems, their surfaces and interfaces are critical boundaries where the structure and the dynamic and kinetic processes occurring gravely affect their properties. Examples range from charge transfer at the interface between photosensitizers and the substrate determines the efficiency of photocatalytic or photovoltaic functions of composite nanomaterials, to the efficacy of a drug molecule against bacterial cells depends on how the molecule adsorb and transport at the cell membrane. To probe and characterize the structure and processes at surfaces and interfaces in complex chemical and biological systems requires uniquely designed experimental and computational tools. Despite the varying complexity among the different chemical and biological systems, their surfaces and interfaces share some common challenges for experimental probe and theoretical modelling. This symposium will explore how to overcome these challenges as well as review recent advances in understanding how surfaces and interfaces affect the properties of complex chemical and biological systems. Hai-Lung Dai in his past 4 decades of academic career (22 years at the University of Pennsylvania and 18 at Temple University) has made significant contributions to the development of novel experimental approaches for probing the structure and dynamic/kinetic processes at surfaces and interfaces of crystalline metals and semiconductors in ultrahigh vacuum, particles and micelles in colloids, and liposomes and living biological cells. This symposium honors his contributions at the occasion of his 70th birthyear. The following topics (not limited to these) will be highlighted in this symposium: • Metals and Semiconductors • Nanomaterials • Colloidal Particles • Aerosols and Environmental Surfaces • Model Biological Membranes • Membranes of Living Biological Cells • Development of Methodologies

Elsa Yan

Yale University

Appearances