A non-sintered structure. The non-sintered structure includes a first non-sintered nanocrystal layer, and a second non-sintered nanocrystal layer wherein the first layer and the second layer are configured to interact electronically.
STATEMENT AS TO RIGHTS TO INVENTIONS MADE UNDER FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
 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 and by the Department of the Air Force (AFOSRA) under award No. FA9550-06-1-0488. Additional funding was provided by the Environmental Protection Agency and by the Miller Institute for Basic Research in Science of the University of California at Berkeley. The Government has certain rights in this invention.