University of Connecticut

Events Calendar

Physics Colloquium

Friday, April 6, 2018
3:30pm – 4:30pm

Storrs Campus
Physics Building, Room PB-38

Dr. Mark S. Hybertsen, Center for Functional Nanomaterials, Brookhaven National Laboratory

Single Molecule Junction Conductance & Force Measurements: Laboratory to Probe Structure-Function Relationships

The break-junction technique for simultaneous measurement of junction conductance and sustained force in single molecule junctions bridging metal electrodes naturally probes a large ensemble of junction realizations. The histogram of measured quantities, such as the rupture force or the junction conductance, represent results for ensembles that inherently sample diverse and distinct junction structures at the nano scale [1]. For each structure, conductance and sustained force as a function of junction elongation is sampled for a span of distance defined by stochastic events, particularly the bond rupture event. This rich data set probes structure-function relationships with a stochastic sampling of structure at the nanoscale. In this talk I will discuss these measurements from the theorist perspective with supporting models and calculations. I will also discuss the potential for modeling the data for each individual junction in the ensemble, focusing on sampling the link bond energy [2].

[1] M. S. Hybertsen and L. Venkataraman, Acc. Chem. Res. 49, 452, 2016.

[2] M. S. Hybertsen, J. Chem. Phys. 146, 092323, 2017

Coffee will be served prior to the talk, at 3:00 p.m., In Room P-103


Prof. E. Dormidontova

Physics Department (primary)

Control Panel