Fig. 2: Hydrogen desorption from CHS impurities in deliberately CH-doped WS2.
From: Spin-dependent vibronic response of a carbon radical ion in two-dimensional WS2
a, b Atomic structure of a carbon-hydrogen complex (CHS) and a carbon (CS) substituent at a sulfur site in WS2. The pathway of the tip for the dehydrogenation process is shown in (a). c, d Constant height CO-tip nc-AFM images of the CHS (c) and CS (d) defect. e Sequential, controlled conversion of CH\({}_{\,{{\mbox{S}}}\,}^{-}\) to C\({}_{\,{{\mbox{S}}}\,}^{\bullet -}\) by H desorption (V = 1.1 V, I = 100 pA). The sample bias and current were increased to 2.5 V and 15 nA and rastered over an individual defect with images taken between each conversion. f Large scale image showing conversion of a center subsection (20 × 20 nm2) outlined by the white dashed box (V = 1.2 V, I = 100 pA).
