Cathodic Behavior and Redox Couples - Electrochemistry of Silicon and Its Oxide - page 275

polymer film. 812,878,886 Improvement of stability can also be obtained by coating with
two layers of surface-bond redox couples. 679

Deposition of polymers on a silicon surface can be obtained electrochemi-
78,553,931 Deposition of uniform and well-ordered polymers is emerging as an active
research area for their technology potentials. 1115 Deposition of organic molecules is
more difficult than metals in that the bonds between organic molecules and silicon sub-
strate are directional and covalent. The maximum coverage depends not only on the
size of molecules relative to that of the surface unit cell but also on the matching
between the orientation of surface bonds. It has been found that electrochemical

cally.

deposition of organic compounds such as phenyl groups can be made by reduction

of cations where the substituent X may be Br, COOH, CN,
( n = 1,4,12). 931,1112,1115,1174 The electrochemical process occurs on H-terminated Si(111)

surface and is self-stopped after completion of the first monoplayer. The nature of
bonding between the polymer and silicon is Si-C. 1099 The reaction involved has been
postulated to generally follow

where Si· and R· represent radicals. 1099