Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 113, Issue 52, Pages 21642-21647Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp907950c
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Funding
- RCUK's Basic Technology Research programme
- Engineering and Physical Sciences Research Council [EP/C006755/1, GR/S51486/01, GR/S51493/01] Funding Source: researchfish
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Patterned surfaces can be obtained by soft UV (365 nm) irradiation of thiol-on-gold SAMS (self-assembled monolayers) terminated with ortho-nitrobenzyl-protected carboxylic acid groupings. However, direct irradiation in air leads to incomplete photolysis (<50%). Here we demonstrate that the photolysis yield can be greatly improved (similar to 96%) by acid catalysis. However, if HCl/methanol is used as the catalyst, esterification is observed. This methyl ester formation can be prevented by using a sterically hindered alcohol, such as isopropanol, thereby leading to high yield photolysis, Finally, we demonstrate that such photopatterned SAMS can be used to create functionalized surfaces by covalent attachment of amine-modified microspheres.
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