Therefore, the overall composition of this layer is most probably of chromium oxide and its chemical composition in the depth can be established considering the shape and the binding energies of the Cr 2p and O 1s peaks in Fig. 3.
Therefore,the overall composition of this layer is most probably ofchromium oxide and its chemical composition in the depthcan be established considering the shape and the bindingenergies of the Cr 2p and O 1s peaks in Fig. 3.