Soft-lithography, or the printing of self-assembling molecular inks at micro or sub-micron scale holds the promise of large-scale surface patterning for a variety of applications. One key to the ultimate utility of this concept is continuous roll-to-roll printing on lost-cost flexible substrates. Accordingly, this paper discusses the basic processes involved in roll-to-roll printing of octadecylphosphonic acid (ODPA) on aluminum-coated PET substrates using novel cylindrical stamps cast from PDMS. In addition to printing, visualization of the pattern is achieved through controlled condensation of water vapor and by a post-printing acid etch. By using a roll-to-roll configuration, along with continuous stamps and measurements that can permit real-time online quality monitoring, this method represents a significant step forward in making soft lithography a commercially viable process.
Roll-to-Roll Microcontact Printing of Flexible Aluminum Substrates Using Octadecylphosphonic Acid (ODPA)
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Merian, C, Du, X, Hardt, D, & AlQahtani, H. "Roll-to-Roll Microcontact Printing of Flexible Aluminum Substrates Using Octadecylphosphonic Acid (ODPA)." Proceedings of the ASME 2015 International Mechanical Engineering Congress and Exposition. Volume 14: Emerging Technologies; Safety Engineering and Risk Analysis; Materials: Genetics to Structures. Houston, Texas, USA. November 13–19, 2015. V014T11A016. ASME. https://doi.org/10.1115/IMECE2015-51184
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