Three-dimensional ZnO/Si broom-like nanowire heterostructures as photoelectrochemical anodes for solar energy conversion

1 Department of Electrical and Computer Engineering, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, USA Department of Materials Science and Engineering, University of Michigan, 2300 Hayward Street, Ann Arbor, Michigan 48109, USA Materials Science and Engineering Program, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, USA California Institute of Telecommunication and Information Technology,University of California, SanDiego, 9500GilmanDrive, La Jolla, California 92093, USA