High-resolution infrared data of Si(100) surfaces saturated with H at room temperature show that the so-called 1×{}1 surface is in fact a disordered phase with roughly half the H bonded in monohydride (H-Si-Si-H) and half in dihydride (SiH₂) configurations. Upon saturation exposure at 380 K, the surface is ordered into a newly identified 3×{}1 phase, as evidenced by LEED, involving repeated alternating monohydride and dihydride units.
No takes yet. Share an insight, caveat, or question.
Chabal et al. (1985) studied this question.