A method for reshaping a nanostructure. The method includes: providing a nanostructure having an initial shape; applying energy from a non-chemical energy source to the nanostructure; and thereby reshaping the nanostructure to a reshaped geometry different from the initial shape. The nanostructure may additionally be optionally cleaned with the application of energy from the non-chemical energy source.
STATEMENT AS TO RIGHTS TO INVENTIONS MADE UNDER FEDERALLY SPONSORED RESEARCH AND DEVELOPMENT
 This invention was made with U.S. Government support under Contract Number DE-AC02-05CH11231 between the U.S. Department of Energy and The Regents of the University of California for the management and operation of the Lawrence Berkeley National Laboratory. The U.S. Government has certain rights in this invention.