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Magnetically Responsive Elastomer–Silicon Hybrid Surfaces for Fluid and Light Manipulation
Author(s) -
Yang Zining,
Park Jun Kyu,
Kim Seok
Publication year - 2018
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201702839
Subject(s) - materials science , elastomer , silicon , fluidics , photonics , photonic crystal , microfluidics , nanotechnology , optoelectronics , wetting , transfer printing , composite material , engineering , aerospace engineering
Stimuli‐responsive surfaces with tunable fluidic and optical properties utilizing switchable surface topography are of significant interest for both scientific and engineering research. This work presents a surface involving silicon scales on a magnetically responsive elastomer micropillar array, which enables fluid and light manipulation. To integrate microfabricated silicon scales with ferromagnetic elastomer micropillars, transfer printing‐based deterministic assembly is adopted. The functional properties of the surface are completely dictated by the scales with optimized lithographic patterns while the micropillar array is magnetically actuated with large‐range, instantaneous, and reversible deformation. Multiple functions, such as tunable wetting, droplet manipulation, tunable optical transmission, and structural coloration, are designed, characterized, and analyzed by incorporating a wide range of scales (e.g., bare silicon, black silicon, photonic crystal scales) in both in‐plane and out‐of‐plane configurations.