Potentiometric Titrations for Measuring the Capacitance of Colloidal Photodoped ZnO Nanocrystals
By Brozek, Carl K.; Hartstein, Kimberly H.; Gamelin, Daniel R.
Published in Journal of the American Chemical Society
2016
Abstract
Colloidal semiconductor nanocrystals offer a unique opportunity to bridge molecular and bulk semiconductor redox phenomena. Here, potentiometric titration is demonstrated as a method for quantifying the Fermi levels and charging potentials of free-standing colloidal n-type ZnO nanocrystals possessing between 0 and 20 conduction-band electrons per nanocrystal, corresponding to carrier densities between 0 and 1.2