Physical Chemistry of Nanocrystals with the Graphene Liquid Cell: Nano Seminar Series

Lecture | September 21 | 2-3 p.m. | 390 Hearst Memorial Mining Building

 Prof. A. Paul Alivisatos, UC Berkeley, Chemistry & MSE

 Berkeley Nanosciences and Nanoengineering Institute

Colloidal nanocrystals have emerged as a major building block for nanoscience and nanotechnology. Today it is possible to control the size, shape, and topology of nanocrystals and to harness the variations of their properties with size to create materials with proven applications in biological imaging and electronic displays, and many more applications under development in renewable energy.

Despite these advances, there is much we still do not know about nanocrystals. The advent of in situ liquid cell electron microscopy and especially the graphene liquid cell, have opened the door to a series of new experiments that reveal key aspects of the physical chemistry of nanocrystals. This includes the first structural determination of the positions of all the atoms in a colloidal nanocrystal; methods for directly imaging and tracking individual nanocrystals as they grow or dissolve; and the ability to measure the inter-particle potentials by observing pairwise relative motions.

These new tools are enabling a second revolution in the science of nanocrystals, as they will permit to us to quantitatively control artificial colloidal nanoscale building blocks with atomic precision.

Paul Alivisatos is the Executive Vice Chancellor and Provost. He previously served as the VC-Research and the Director of LBNL. He was a founder of the Molecular Foundry and ACS Nano Letters, and companies including Nanosys and Quantum Dot Corp (Life Tech). Awards include the National Medal of Science, the Linus Pauling Medal, and the Rank Prize for Optoelectronics. He did his PhD in Chemistry here at UC Berkeley in 1986 (Go Bears!)