Structural characterization of organic multilayers on silicon(111) formed by immobilization of molecular films on functionalized Si-C linked monolayers.
Silicon(111)-H surfaces were derivatized with omega-functionalized alkenes in UV-mediated and thermal hydrosilylation reactions to give Si-C linked monolayers. Additional molecular layers of organic compounds were coupled either directly or via linker molecules to the functionalized alkyl monolayers. In the first instance, amino-terminated monolayers were prepared from a tert-butoxycarbonyl-protected omega-aminoalkene followed by removal of the protecting group. Various thiols were coupled to the monolayer using a heterobifunctional linker, which introduced maleimide groups onto the surface. In the second system, N-hydroxysuccinimide (NHS) ester-terminated monolayers were formed by reaction of Si-H with N-succinimidyl undecenoate. The reactivity of the NHS ester groups was confirmed by further modification of the monolayer. The stepwise assembly of these multilayer structures was characterized by X-ray reflectometry and X-ray photoelectron spectroscopy.
UNESCO Centre for Membrane Science and Technology, Department of Biophysics, School of Physics, University of New South Wales, Sydney, NSW 2052, Australia. t.boecking@unsw.edu.au
Till
T
Böcking
Michael
M
James
Hans G L
HG
Coster
Terry C
TC
Chilcott
Kevin D
KD
Barrow
D000475:Alkenes / Q000737:chemistry* / Q000528:radiation effects; D002244:Carbon / Q000737:chemistry*; D008567:Membranes, Artificial; D015394:Molecular Structure; D017646:Organosilicon Compounds / Q000138:chemical synthesis / Q000737:chemistry / Q000528:radiation effects; D012825:Silicon / Q000737:chemistry* / Q000528:radiation effects; D013499:Surface Properties
D000475:Alkenes; D008567:Membranes, Artificial; D017646:Organosilicon Compounds; D002244:Carbon; D012825:Silicon