Transport Properties of Complex Nanosystems: Nano Seminar Series

Seminar | September 27 | 2-3 p.m. | 120 Latimer Hall

 Dr. Jeffrey J. Urban, LBNL Molecular Foundry

 Berkeley Nanosciences and Nanoengineering Institute

Heat, charge, and mass are fundamental energy carrying modes relevant to nearly all dynamic properties of interest in engineering, physics, and modern energy technologies. Here, I will discuss the design and understanding of transport properties in complex nanoscale systems where the dimensional constraints are changed systematically to reveal fundamental principles of transport. The first part of this talk will focus on heat and charge transport in polymeric and hybrid nanomaterials, revealing the physical origins of scaling laws for charge transport in these materials. I will also briefly highlight strong deviations from the Wiedemann-Franz law in materials with electronic phase transitions, and possible applications of this phenomenology for novel devices exhibiting, for example, thermal rectification and thermal memristance.

The second portion of my talk will highlight other complementary research directions in my group, by briefly highlighting recent results in mass transport in the context of selective gas transport membranes, hydrogen storage, and water purification/selective ion removal.

Jeff Urban is Director of the Inorganic Nanostructures Facility at LBNL. He did his PhD at Harvard and postdoc at UPenn. Awards include an NAE top scientist under age 45 (2013) and the NRS Excellence in Science. He joined LBNL in 2007.