SEM images of GaOOH rods. These rods are grown on ITO electrode of LEDs with and without ATO seed layer under different cathodic voltages for 100 min at 80°C. (a) Bare ITO, −2 V; (b) ATO/ITO, −1.8 V; (c) ATO/ITO, −2 V; and (d) ATO/ITO, −2.2 V.
Lee et al. Nanoscale Research Letters 2012 7:458 doi:10.1186/1556-276X-7-458