Diffusion of H2O on surfaces of clean and Au covered tungsten field emitters

✍ Scribed by R Bryl

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 232 KB
• Volume: 48
• Category: Article
• ISSN: 0042-207X
• DOI: 10.1016/s0042-207x(96)00284-9

✦ Synopsis

The results of field emission microscopy measurements of the diffusion of water deposited on a thermally clean and a gold covered tungsten emitter are presented. The diffusion of water from a multilayer to a submonolayer H,O was observed on clean Win the temperature range 126147 K and on Au/W (0 2 2) in the range 113-123 K, with activation energies for diffusion of 27f 2 kJ/mol in both cases. It is suggested that water in the low coverage range can diffuse on clean Wand Au surfaces at temperatures as low as 78 K.