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3 November 2016 Azobenzene-based surface patterns revisited: New insights with new materials? (Conference Presentation)
Arri Priimagi
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Proceedings Volume 9939, Light Manipulating Organic Materials and Devices III; 99390A (2016) https://doi.org/10.1117/12.2237313
Event: SPIE Organic Photonics + Electronics, 2016, San Diego, California, United States
Abstract
This contribution focuses on a relatively old topic of azobenzene photomechanics, namely the photoinduced surface patterning. The phenomenon was demonstrated alreay in 1995, yet it has not redeemed its promise as a simple, one-step patterning method that could challenge the more conventional microfabrication techniques. However, inspired by recent advances in fabrication techniques, materials development, and theoretical modelling, the field is going through a revival from both fundamental and applied perspectives. (i) How much (or how little) azobenzene needed in order to create the surface patterns? (ii) What is the maximum size of objects that can be moved with light? (iii) Can one pattern crystalline materials? (iv) Under what conditions ss the patterning process light-reversible? These questions will herein be addressed via four case studies, all employing supramolecular materials where non-covalent intermolecular interactions are used to attach the azobenzenes into a passive host matrix. All azobenzene-based material movements are triggered by photoisomerization and are therefore inherently related to one another, and therefore we believe our observations to provide useful insights also for photomobile materials and photomechanical actuation.
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Arri Priimagi "Azobenzene-based surface patterns revisited: New insights with new materials? (Conference Presentation)", Proc. SPIE 9939, Light Manipulating Organic Materials and Devices III, 99390A (3 November 2016); https://doi.org/10.1117/12.2237313
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KEYWORDS
Optical lithography
Crystals
Fabrication
Microfabrication
Modeling
Current controlled current source
Organic materials
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