Spectral reflectance of the black platinum as the function of wavelength. For comparison, the reflectance of the polished sample before laser processing is also shown.
(a) Photograph of the black platinum and (b) SEM image of platinum surface before laser processing.
SEM images showing surface structural features of the black platinum produced in air.
SEM images showing more detailed view of surface structures of the black platinum produced in air.
EDS spectra of the untreated surface (above) and the blackened surface produced in air (bottom). The two spectra exhibit essentially the same elemental compositions.
Absorptance of platinum as the function of the number of laser shots applied to the sample in both 1 atm air and in vacuum at the base pressure of .
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