Potential-directed assembly of aryl iodonium salts onto silicon {100} hydride terminated and platinum surfaces.
A novel electrograft method of forming covalent bonds directly to silicon hydride or platinum surfaces has been demonstrated with the use of iodonium salt precursors. Initially, a silicon substrate is treated with a dilute hydrofluoric acid wash to ensure a hydride-passivated surface, which is immersed in a solution of iodonium salt dissolved in a solution of tetrabutylammonium tetrafluoroborate in acetonitrile. Grafting is accomplished by applying a negative bias to the silicon substrate. Directed assembly has been demonstrated with Pt substrates.
Dirk
Shawn M
SM
Pylypenko
Svitlana
S
Howell
Stephen W
SW
Fulghum
Julia E
JE
Wheeler
David R
DR