a
Department of Materials Science and Engineering, Cornell University, 330 Bard Hall, Ithaca, USA
E-mail: ubw1@cornell.edu
;
Fax: +1 607 255 2365
b
Department of Chemical Engineering and School of Environmental Science and Engineering, Pohang University of Science and Engineering, Pohang, Republic of Korea
c
Department of Radiology, Memorial Sloan-Kettering Cancer Centre, 1275 York Avenue, New York, USA
d
Center for Nanocrystalline Materials and School of Chemical and Biological Engineering, Seoul National University, Seoul, Republic of Korea
e
Department of Physics, Cornell University, Ithaca, USA
f
Cornell High Energy Synchrotron Source (CHESS), Cornell University, Ithaca, USA