Figure 6From: Single-step processing of copper-doped titania nanomaterials in a flame aerosol reactor Absorption spectrum of Cu-doped TiO 2 nanomaterials prepared at various dopant concentrations. (a) Normalized UV-visible absorption spectra measured by diffuse reflectance spectroscopy. (b) Estimated band gap as a function of dopant concentrations (test 1)Back to article page