Near Ambient Pressure X-ray Photoelectron Spectrometer


Our state-of-the-art Near Ambient Pressure X-ray Photoelectron Spectroscopy (NAP-XPS) is a lab-based equipment which affords the capability of probing surfaces in a realistic, i.e., non ultra-high vacuum environment. Our custom-built NAP-XPS (SPECS Surface Nano Analysis, GmbH Germany) is equipped with a PHOIBOS 150 Hemispherical Energy Analyzer coupled to a differentially pumped electrostatic lens system. A reaction cell installed in the analysis chamber with a base pressure of  ~10-10 mbar allows, via a chamber-in-chamber design, in situ XPS studies at pressures ranging from 10-10 mbar up to 20 mbar, and temperatures ranging from room temperature to 1,100K.

XPS is a common analytical tool used for quanitative measurement of the elemental composition as well as specific chemical state information of the surface constituents. We can now probe chemical interactions on the atomic level for vapor/solid interfaces. NAP-XPS also alows the investigation of the electronic and structural properties of small organics.