Materials for mass standards: long-term stability of PtIr and Au after hydrogen and oxygen low-pressure plasma cleaning

• Published in: Metrologia Vol. 49; no. 6; pp. 615 - 627
• Main Authors: Fuchs, P, Marti, K, Russi, S
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 01.12.2012
• Subjects: Chemical contaminants; Contamination; Hydrogen; Oxygen; Pressure

The recontamination and long-term stability of materials suitable for mass standards was studied with x-ray photoemission spectroscopy after low-pressure plasma cleaning using hydrogen and oxygen. The cleaned samples were stored in air or argon at ambient pressure and under UHV conditions and the su...