Functional Nanomaterials from Self-Assembly

Seminar | February 2 | 4-5 p.m. | 348 Hearst Memorial Mining Building

 Professor Uli Wiesner, Cornell University

 Materials Science and Engineering (MSE)

Global problems including energy conversion and storage, clean water and human health require increasingly complex, multi-component and functional materials with unprecedented control over composition, structure, and order down to the nanoscale. This talk will give examples for the rational design of novel functional hybrid nanomaterials inspired by biological examples. Discussion will include formation of self-assembled hybrid nanoparticles referred to as Cornell dots (C dots) as well as polymer-nanoparticle self-assembly derived synthetic porous materials with amorphous, polycrystalline, and epitaxially grown single-crystal structures. Experiments will be compared to theoretical predictions to provide physical insights into formation principles. The aim of the described work is to understand the underlying fundamental chemical, thermodynamic and kinetic formation principles enabling generalization of results over a wide class of materials systems. Examples will cover the formation of hierarchical structures at equilibrium as well as via processes far away from equilibrium. Targeted applications of the prepared systems will include the development of fluorescent hybrid probes for nanomedicine, nanostructured hybrids for energy conversion and storage devices, as well as the formation of first self assembled superconductors.

 daisyh@berkeley.edu, 5106423801