The Golden Road: Synthesis and Surface Chemistry of Gold Nanocrystals – Professor Catherine J. Murphy (University of Illinois at Urbana-Champaign)

When:
January 15, 2020 @ 2:00 pm – 3:00 pm
2020-01-15T14:00:00+00:00
2020-01-15T15:00:00+00:00
Where:
Wolfson Lecture Theatre
Contact:
Lingtao Kong

That “finely-divided metals” have unusual optical properties has been known since ancient times. Gold, for instance, can appear red, green, blue or brown on the nanoscale. In this talk I will describe synthetic methods to create colloidal gold nanocrystals of tunable size, shape, and therefore tunable optical properties. The structure-directing agents in the synthesis are thought to bind to different crystal facets of the growing nanocrystals and therefore dictate nanocrystal shape: new, improved imaging methods are beginning to allow us to see if this is true. The surface is where the nanocrystals meet and greet the rest of the world; strategies to coat them isotropically and anisotropically with hard and soft shells will be discussed.