Figure 2: The surface terminating chemistry of GeCH3.
From: Improving the stability and optical properties of germanane via one-step covalent methyl-termination

(a) FTIR spectra of GeH (i), GeCH3 (ii), Ge13CH3 (iii) and GeCD3 (iv). The intensity of the four spectra are all multiplied by 0.5 in the range of 400–900 cm−1. (b) XPS spectra of the Ge 2p3/2 peak for GeH (solid line) and GeCH3 (dashed line), indicating exclusively Ge+1 on the surface. XPS, X-ray photoelectron spectroscopy.