XPS

Question 1

photoelectron spectroscopy

Answer 1

Xrays in
Electrons OUT
VACUUM

Question 2

Commun usages

Answer 2

• Surface analysis (<5-10 nm)

Chemical:
* Elemental composition and oxidation states
* Reactions at surfaces and interfaces

Electronic:
* Density of states in reciprocal space

Electrostatic
* Surface potentials
* Energy band alignments at interfaces

Question 3

What influences the intensity?

Answer 3

-Intensity of overlayer emission y
-X-ray flux
-atomic density of overlayer
-photoionization cross section of emission y
-effective attenuation length of emission y in overlayer
-overlayer thickness