Argonne National Laboratory

Colloquium Series

The Center for Nanoscale Materials holds a regular biweekly colloquium on alternate Wednesdays at 11:00 a.m. in Bldg. 440, Room A105/106. The goal of the series is to provide a forum for topical multidisciplinary talks in areas of interest to the CNM and also to offer a mechanism for fostering interactions with potential facility users.

Committee Members:

  • Xiao-Min Lin (Chair)
  • Pierre Darancet
  • Ralu Divan
  • Xuedan Ma
  • Elena Rozhkova
  • Jianguo Wen
Dec. 13, 2017

"Mimics of chemical barrier crossing to strange "non-reciprocal" dynamics in Optical matter"Norbert Scherer, University of Chicago, Host: Xiao-Min Lin

The interaction of light with matter is one of the primary means employed to understand the world around us, particularly from atomic and molecular scales and up. However, electromagnetic radiation can also be used to generate forces and momentum on systems for active manipulation. While these forces are relatively weak on macro-scales, they have realized great impact on  the (sub-)microscale in biophysics, cell biology and nanoscience. This talk will present another direction - the creation of optical matter from nanoparticle building blocks by optical binding forces - to study barrier crossing phenomena in chemistry and the manifestation of non-reciprocal (non-conservative) dynamics. The new insights into barrier crossing and the applicability of widely-used theoretical descriptions based on Kramers theory are made possible by direct visualization of single particle dynamics vs. the unseeable dynamics that occur at the molecular level in Chemistry and Biophysics. Understanding (apparent) non-conservative dynamics of multi-particle optical matter systems, as manifest in "negative torque" and linear motion that seem to defy the actio et reactio principle of classical Physics requires considering optical matter as a many body system/problem with all-to-all relatively long range electrodynamic interactions. 

Jan. 10, 2018 Tim Berkelbach, University of Chicago.  Host: Pierre Darancet
Jan. 24, 2018 Kathleen J. Stebe, University of Pennsylvania, Host: Xiao-Min Lin
Feb. 7, 2018 Pierre-Nicholas Roy, University of Waterloo, Host: Stephen Gray
Feb. 21, 2018 Alexandra Boltasseva, Purdue University, Host: Gary Wiederrecht
Apr. 18, 2018 Nicholas A. Kotov, University of Michigan.  Host:  Gleiciani de Queiros Silveira
May 2, 2018 David S. Ginger, University of Washington, Host: Pierre Darancet
May 16, 2018 Gong Gu, University of Tennessee, Host: Lifen Wang
May 30, 2018 Yugang Sun, Temple University.  Host:  Gary Wiederrecht
Jun. 13, 2018 Mike Arnold, University of Wisconsin, Host: Nathan Guisinger
Jun. 27, 2018 James Alexander Liddle, National Institute of  Standards and Technology (NIST), Host: Ralu Divan
Jul. 11, 2018  
Jul. 25, 2018  
Aug. 8, 2018  
Sep. 5, 2018  
Sep. 19, 2018  
Oct. 3, 2018  
Oct. 17, 2018  
Oct. 31, 2018  
Nov. 14, 2018

Stephen G. Sligar, University of Illinois, Host: Elena Rozhkova