Figure 2
From: Silicene oxides: formation, structures and electronic properties
Formation energy of a silicene oxide with Oqb, Odb, 
, 
, OHtl, OHul, OHbl, OHal, Oqb + Odb, Oqb + 
, Oqb + 
, Oqb + OHtl, Oqb + OHul, Oqb + OHbl or Oqb + OHal with respect to the difference between the chemical potential of OH in the oxidation system of silicene and that in water.
