Monolithic, Hierarchical Surface Reliefs by Holographic Photofluidization of Azopolymer Arrays: Direct Visualization of Polymeric Flows

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Hierarchically ordered, monolithic surface reliefs have attracted a great deal of interest due to their applications in advanced photonics and interface sciences. While many impressive achievements in fabrication of such surface reliefs have been made over the last decade, all established methods are still restricted by a number of factors, such as limited control of structural features, inherently induced structural defects, impractically low throughput, and technical barriers caused by mechanical contact. Herein, a deterministic and scalable fabrication of hierarchically ordered, monolithic surface reliefs by holographic photofluidization of azopolymer line arrays is demonstrated. In particular, it is shown that the structural features of monolithic surface reliefs including shapes and modulation heights can be deterministically tunable by adjusting the polarization and irradiation time of the holographic interference pattern. Moreover, by a direct visualization of azopolymeric flow according to the light polarization, a long-standing question about the origin of surface-relief-grating formation on azopolymer film is addressed in terms of polymeric flows. Finally, as proof of concept for the practical application of the obtained hierarchical surface reliefs, dependence of wetting properties on modulating height is demonstrated.
Publisher
WILEY-BLACKWELL
Issue Date
2011-12
Language
English
Article Type
Article
Keywords

SOLAR-CELLS; BLOCK-COPOLYMERS; FILMS; LITHOGRAPHY; GRATINGS; ADHESIVE; FABRICATION; PLASMONICS; TEMPLATES; MECHANISM

Citation

ADVANCED FUNCTIONAL MATERIALS, v.21, no.23, pp.4412 - 4422

ISSN
1616-301X
URI
http://hdl.handle.net/10203/100721
Appears in Collection
CBE-Journal Papers(저널논문)
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