XPS is one of the best technique.

Dear ZAidi

You will believe or not for one of my paper results, I have verified the phase of my material by doing its XPS, Raman and XRD but the reviewer 1 rejected it after minor revisions by saying that I have not shown the hexagonal phase via TEM. Though,  I have clearly shown the d-spacing which exactly belong to my materials. 

After the reviewer comments, I am not only surprised and wonder but also feel very sorry that the journal keeps such a people as reviewers who even do not know the basic characterization tools.

 Dear Pervaiz...i think he didnt not familiar with XPS...XPS is one of the powerful technique to determine the oxide species..what ashamed...hmmm

Check this out http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.75.3918

Dear ZAIDI

Thanks for such a nice article and your view.