Nanoscience Seminar Series | James Heath

Molecular Mechanics and Molecular Electronics
Tuesday, November 16, 2004 - 11:40am
Gross Chemistry Building, Room 103

James R. Heath
Elizabeth W. Gilloon Professor & Professor of Chemistry
Caltech Division of Chemistry and Chemical Engineering
M/C 127-72 Pasadena, CA 91125

Very few molecular properties are amenable to study across a broad range of physical environments. One such property is electrochemically driven molecular actuation, and bistable [2]catenanes and [2]rotaxanes provide for ideal molecular systems for investigating this property. These synthetically versatile molecular machines may be incorporated into a number of different environments. Furthermore, the large geometrical and electronic changes that accompany the electrochemically driven molecular motion yield a variety of experimental signatures for quantifying that motion. I will discuss experiments aimed at elucidating the kinetic and thermodynamic parameters of molecular switching in the solution phase, solid-state polymer electrolyte matrices, self-assembled monolayers of electrode surfaces, and molecular switch tunnel junctions. I will then discuss how we have incorporated these molecular mechanical systems into reasonably large-scale circuits (>104 devices), patterned at a device density of 1011 bits/cm2, to demonstrate memory and logic operations.