Fig. 3

(a) Field emission scanning electron microscopy (FESEM) images with two different magnifications, (b) The distribution histogram of nanorods diameters, and (c) energy dispersive X-ray plot (EDX) including the atomic percentages of the elements detected in the Au-H2Ti3O7 nanostructure. The fitting log-normal function to the distribution histogram of nanostructure diameters is shown with a solid red line in the histogram plot.