Abstract
I will summarize several collaborative efforts to develop new non-contact methods for heating, thermometry, and thermal property measurements. The first part of the talk will be on nanoscale techniques using SEM. The incident electron beam can serve as a point heat source, and in certain conditions the local sample temperature can also be determined from the electrons leaving the sample. I also will introduce an all-optical “structured illumination, thermal imaging” (SITI) technique based on thousands of individually-addressable pixels of optical heating, rather than a single laser heating spot like traditional methods. SITI enables parallel measurement of multiple samples in a single field of view; can tolerate rough, porous, and/or scratched samples; and uses software-controllable heating patterns that can be altered on the fly to extract directional properties like the thermal conductivity tensor.
About the Speaker
Chris Dames’ research focuses on fundamental aspects of the thermal sciences at the nanoscale and other challenging regimes. He earned his PhD from MIT in 2006 under Gang Chen, following a BS and MS (under Arun Majumdar) from UC Berkeley. Prof. Dames’ recognitions include an NSF CAREER Award, DARPA Young Faculty Award, Viskanta Fellowship and heat transfer lectureship at Purdue University, and selection to the Faculty Leadership Academy at UC Berkeley. He has been serving as Chair of the Department of Mechanical Engineering at UC Berkeley since July 2021.
Host: Professor Tony Jacobi
