The present invention provides for a metal-molecule heterostructure comprising (a) a plurality of metal, semimetallic or semiconducting nanoparticles, and (b) a plurality of electrically conductive organic molecules interspersed among the nanoparticles. The metal-molecular heterostructure is useful in a device, such as a thermoelectric energy converter, battery or capacitor.
STATEMENT OF GOVERNMENTAL SUPPORT
 The invention described and claimed herein was made in part utilizing funds supplied by the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. The government has certain rights in this invention.