Fig. 1: Pt nanoclusters on GaN nanowires grown on n+-p Si wafer.
From: Pt nanoclusters on GaN nanowires for solar-asssisted seawater hydrogen evolution
a Schematic illustration of the fabrication of Pt/GaN/Si photocathode by epitaxial growth of GaN nanowires (NWs) on Si p-n wafer and photodeposition of Pt nanoclusters (NCs). b 45°-tilted-view SEM image of Pt/GaN/Si. c HAADF-STEM image of Pt/GaN NWs. Bright contrast regions due to Pt NCs are marked with red circles. STEM-EDS elemental maps of d Ga, e N, and f Pt. g Ga 2p3/2, h N 1 s, and i Pt 4f XPS spectra for GaN/Si and Pt/GaN/Si electrodes.
