1. Photo-deprotection patterning of self-assembled monolayers
- Author
-
Robert E. Ducker, Stephen D. Evans, Richard J. Bushby, Jonathan P. Bramble, Graham J. Leggett, Lixin Zhang, and Kevin Critchley
- Subjects
Materials science ,Microcontact printing ,Monolayer ,Biomedical Engineering ,Uv laser ,General Materials Science ,Bioengineering ,Self-assembled monolayer ,Nanotechnology ,Nanoscopic scale - Abstract
Photo-deprotectable self-assembled monolayers (SAMs) provide a versatile platform for creating functional patterned surfaces. In this study, we present nanoscale photo-patterning, multi-component patterning, and a method for producing molecular gradients using photo-deprotectable SAMs. Nanoscale patterning of photo-deprotectable SAMs was achieved by coupling a UV laser (365 nm) through a scanning near field probe to produce nanoscale lines of ∼40 nm, i.e. λ/9. Multi-component patterning was achieved by a two-stage method combining both microcontact printing and soft-UV photo-patterning. The example demonstrated in this study produced a three-component patterned surface with regions of CF3, CH3 and COOH/CF3 functionality. The versatility of these photocleavable SAMs is further demonstrated by creating linear molecular gradients of two functionalities along a distance of ∼25 mm. The use of ‘soft’ UV gives several advantages including the ability to pattern SAMs with micron-scale features over large areas qu...
- Published
- 2007
- Full Text
- View/download PDF