Question

Which of the following is the detection limit of ESCA?

(a) 0.1% monolayer

(b) 0.5% monolayer

(c) 1% monolayer

(d) 2% monolayer

I got this question in an interview for internship.

My question is taken from Electron Spectroscopy for Chemical Analysis topic in chapter Electron and Ion Spectrometers of Analytical Instrumentation

Answer 1

The correct choice is (a) 0.1% monolayer

To elaborate: The detection limit of ESCA is 0.1% monolayer. It has no x-y resolution.