Journal
CHEMICAL COMMUNICATIONS
Volume 58, Issue 81, Pages 11378-11381Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2cc03169h
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Traditionally, self-assembled monolayers formed on silicon require the removal of the insulating and chemically inert silica layer. However, we have discovered that thin organic films can also be formed electrochemically on silicon surfaces terminated with up to 20 nm of silica.
Traditionally, self-assembled monolayers formed on silicon require the removal of the insulating and chemically inert silica layer that naturally forms on the surface of crystalline silicon. The removal of silica is thought to be necessary in order to expose the conducting Si-H surface, which is reactive towards molecules. Here we report the unexpected result of electrochemical formation of thin organic films on silica-terminated silicon with silica thickness up to 20 nm. The process is facilitated by the electrochemical generation of aryl radicals that react with silanol groups at the distal end of silica.
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