Rhenium cleaning surface

Field emission microscopy was the first technique capable of imaging surfaces at resolution close to atomic dimensions. The pioneer in this area was E.W. Muller, who published the field emission microscope in 1936 and later the field ion microscope in 1951 [23]. Both techniques are limited to sharp tips of high melting metals (tungsten, rhenium, rhodium, iridium, and platinum), but have been extremely useful in exploring and understanding the properties of metal surfaces. We mention the structure of clean metal surfaces, defects, order/disorder phenomena,... 

D. H. Buckley Similar carbon bonding results have been observed on clean iridium and rhenium surfaces. 

R. Ducros, J. Fusy, Core level binding energy shifts of rhenium surface atoms for a clean and oxygenated surface. J. Electron Spectrosc. Relat. Phenom. 42(4), 305-312 (1987)... 

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