Figure 4From: Large-scale and uniform preparation of pure-phase wurtzite GaAs NWs on non-crystalline substratesTypical reflectance spectrum. Reflectance spectrum (black line) of the GaAs NWs grown by 0.1-nm thick Au film on SiO2/Si substrates, which determines the electronic bandgap (Eg) of approximately 1.62 eV by extrapolation (red line).Back to article page