Skip to Content
Find More Like This
Return to Search

Photoelectrochemical molecular comb

United States Patent

August 15, 2006
View the Complete Patent at the US Patent & Trademark Office
Oak Ridge National Laboratory - Visit the Partnerships Directorate Website
A method and apparatus for separating molecules. The apparatus includes a substrate having a surface. A film in contact with the surface defines a substrate/film interface. An electrode electrically connected to the film applies a voltage potential between the electrode and the substrate to form a depletion region in the substrate at the substrate/film interface. A photon energy source having an energy level greater than the potential is directed at the depletion region to form electron-hole pairs in the depletion region. At least one of the electron-hole pairs is separated by the potential into an independent electron and an independent hole having opposite charges and move in opposing directions. One of the electron and hole reach the substrate/film interface to create a photopotential in the film causing charged molecules in the film to move in response to the localized photovoltage.
Thundat; Thomas G. (Knoxville, TN), Ferrell; Thomas L. (Knoxville, TN), Brown; Gilbert M. (Knoxville, TN)
UT-Battelle LLC (Oak Ridge, TN)
10/ 077,633
February 15, 2002
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH This invention was made with government support under contract DE-AC05-00OR22725, awarded by the United States Department of Energy to UT-Battelle, LLC, and the United States Government has certain rights in this invention.