Formation of Pt–C films by ion beam assisted deposition for the application of suppression thermo-electron emission

Platinum and carbon were deposited onto the surface of molybdenum grids simultaneously by ion beam assisted deposition. The structure of the Pt–C films was studied by XRD and Raman spectroscopy. The XRD results showed that Pt exhibited mixed strong (1 1 1) and weak (2 0 0) orientations. The Raman spectra showed that the carbon existed in the form of graphite-like phase. Electron emission characteristics from the Mo grid with and without Pt–C films were measured using analogous diode method. The results showed that electron emission from the Mo grid coated with Pt–C films was much less than that from the Mo grid without Pt–C films. The obtained results demonstrated that the Pt–C films are effective grid-coating materials for the application of suppression thermo-electron emission.