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(Color online) (a) Scheme of nm Pd trilayer thin films and (b) simulation of their optical reflectance in the metallic (solid lines + symbols) and hydrogenated (symbols) states for various thickness of or layers (◻ , 엯 , ▵ , ▿ , and ).
(Color online) Optical reflectance spectra of a Pd thin film measured at different times during hydrogenation at room temperature in a flow of 5% in Ar.
(a) Time dependence of the optical reflectance at of a Pd trilayer film during the first 20 hydrogenation ( of 5% in Ar) and dehydrogenation ( of 10% in Ar) cycles. (b) Zoomed area for selected cycles. (Note that the time scales are different for hydrogen absorption and desorption.)
(Color online) Auger spectra of Pd as sputtered (◻) and after 20 hydrogenation-dehydrogenation cycles (●). Inserts highlight the signals of Ti and O.
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