Figure 5From: Formation of tungsten oxide nanostructures by laser pyrolysis: stars, fibres and spheres Left: the Raman spectrum of the sample prepared at the 10.48-μm wavelength and 51.2 W/cm 2 power density with a SEM micrograph in the inset showing the morphology. Right: the corresponding XRD spectrum with the histogram of the diameters of a selection of the nanostructures of the corresponding SEM micrograph in the inset. The Raman and XRD suggest a monoclinic phase WO3.Back to article page