X-Ray Photoelectron Spectroscopy
| Formula / Notation | KE = hν - BE - φ |
|---|---|
| Also Known As | XPS, ESCA, photoelectron spectroscopy, surface chemical analysis |
What is X-Ray Photoelectron Spectroscopy?
X-ray Photoelectron Spectroscopy (XPS), also known as ESCA (Electron Spectroscopy for Chemical Analysis), is a surface-sensitive analytical technique that measures the elemental composition, oxidation states, and chemical bonding of the top 1–10 nm of a material surface. X-rays (typically Mg Kα or Al Kα) irradiate the sample and eject photoelectrons whose kinetic energies are measured to determine binding energies.
Formula & Notation
Other Names / Synonyms: XPS, ESCA, photoelectron spectroscopy, surface chemical analysis
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
X-ray Photoelectron Spectroscopy (XPS), also known as ESCA (Electron Spectroscopy for Chemical Analysis), is a surface-sensitive analytical technique that measures the elemental composition, oxidation states, and chemical bonding of the top 1–10 nm of a material surface. X-rays (typically Mg Kα or Al Kα) irradiate the sample and eject photoelectrons whose kinetic energies are measured to determine binding energies.
Surface analysis of catalysts, corrosion, and thin films. Semiconductor device characterization. Adhesion and coating analysis. Polymer surface chemistry. Biological and pharmaceutical surface analysis. Quality control of surface treatments. Forensic analysis.
X-rays: ionizing radiation — shielded instruments, no external exposure during operation. Sample preparation may involve hazardous solvents. High vacuum system — implosion risk with damaged chamber. Sample may contain hazardous materials (radioactive, toxic, biological).
The formula or notation for X-Ray Photoelectron Spectroscopy is: KE = hν - BE - φ