Reaction-Diffusion-Mediated Photolithography for Designing Pseudo-3D Microstructures

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Microstructures with 3D features provide advanced functionalities in many applications. Reaction-diffusion process has been employed in photolithography oduce pseudo-3D microstructures in a reproducible manner. In this work, the influences of various parameters on growth behavior of polymeric structures are investigated and the use of the reaction-diffusion-mediated photolithography (RDP) is expanded to a wide range of structural dimensions. In addition, how a lens effect alters the growth behavior of microstructures in conjunction with reaction-diffusion process is studied. For small separation between reaction sites in the array, ultraviolet (UV) exposure time is optimized along with the separation to avoid film or plateau formation. It is further proved that the RDP process is highly reproducible and applicable to various photocurable resins. In a demonstrative purpose, the use of microdomes created by the RDP process as microlens arrays is shown. The RDP process enables the production of pseudo-3D microstructures even with collimated UV light in the absence of complex optical setups, thereby potentially serving as a useful means to create micropauerns and particles with unique structural features.
Publisher
WILEY-V C H VERLAG GMBH
Issue Date
2017-05
Language
English
Article Type
Article
Citation

SMALL, v.13, no.17

ISSN
1613-6810
DOI
10.1002/smll.201603516
URI
http://hdl.handle.net/10203/223838
Appears in Collection
CBE-Journal Papers(저널논문)
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