Abstract
The effects of surface roughness on Auger Electron Spectroscopy (AES) and Electron Spectroscopy for Chemical Analysis (ESCA or XPS) have been a problem in surface analysis. In the present paper, the quantitative relationship between surface area and ESCA signal intensity was studied using a variety of electrodeposited foils. The foil surfaces studied here can be classified into two categories: Type A is cone-shaped (diameter: ∼5 μm, height: ∼5 μm) and Type B is cone-shaped with small nodules (diameter: ∼1 μm) on the surface. The morphology of the foils was studied by Scanning Electron Microscopy (SEM). The surface area was measured by the Brunauer, Emmett and Teller (BET) gas adsorption technique and light scattering experiments. The ESCA signal intensities of the foils were studied after gold deposition. The results show a strong correlation between surface area data and ESCA signal intensities, for both Type A and Type B foils. Thus, we concluded that it is possible to obtain relative surface area information by ESCA.
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