SEM images of GaP NWs on Si(111): (a) and (d) at Tsub = 585 °C (sample B), (b) and (e) at Tsub = 600 °C (sample C), and (c) and (f) at Tsub = 615 °C (sample E).
SEM images of GaP NWs on Si(111): (a) at Tsub = 515 °C (sample A) and (b) at Tsub = 630 °C (sample E).
(Color online) TEM images of (a) GaP core and (b) GaNP shell show the twinning planes (red solid arrow) along the  NW growth direction.
Average diameters and lengths of NWs for samples A–E, which grew at Tsub ranging from 515 to 630 °C.
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