Electrochemical Science and Technology in Nanoscale Domains
Henry S. White
Department of Chemistry
University of Utah
Electrochemistry in nanoscale domains is the driving science underlying
several emerging technologies in the fields of energy storage, molecular
electronics, and chemical sensors. A relatively unexplored issue is whether
the principles employed to describe the behavior of macroscopic electrodes
require modification as the electrode size is reduced to nanometer dimensions.
Experimental measurements and computer simulations of single nanoscale electrodes
will be presented to demonstrate that both molecular transport and electron-transfer
rates (and, thus, the current) do not obey classical predictions as the electrode
is reduced to nanometer dimensions, a consequence of the increased importance
of interfacial fields as the electrode size is reduced. The consequences
of these phenomena are demonstrated using proposed “nanobatteries” in which
the anode and cathode are separated by a few nanometers.