Abstract
IrO 2 nanocrystals (NCs) were grown on top of rutile (R) TiO 2 nanorods (NRs) sitting on sapphire (SA) (1 0 0) substrate via metal organic chemical vapor deposition by using (C 6H 7)(C 8H 12)Ir and Ti[OCH(CH 3) 2] 4 as source reagents. The surface morphology and structural properties of the as-deposited NCs were characterized. The field-emission scanning electron microscopy images and X-ray diffraction patterns indicate growth of V-shaped IrO 2(1 0 1) nanowedges (NWs) on top of R-TiO 2 NRs. Transmission electron microscopy and selected-area electron diffractometry characterizations of IrO 2 NCs showed that the NWs were crystalline IrO 2 with a twin plane of (1 0 1) and twin direction of [ 1 ¯ 0 1 ] at the V-junction.
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