The effectiveness of HCl and HF cleaning of surface
(a) and (b) spectra for at . Top: as received; middle: etched in 10% HCl for 10 min; bottom: etched in 2% HF for 2 min. Spectra are normalized by the bulk peak intensity to show the line shape change.
spectra for etched in 2% HF for 2 min with numerical fitting. (a) , normal emission angle; (b) , emission angle; (c) , normal emission angle. Ge monohydride, dihydride, and trihydride are labeled as , , and , respectively.
(a) Ratios of the intensities for , , and peaks over bulk peak at different emission angles. (b) The calculated surface coverages of , , and at different emission angles.
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