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- W3195479901 abstract "Setae, fibrils located on a gecko's feet, have been an inspiration of synthetic dry microfibrillar adhesives in the last two decades for a wide range of applications due to unique properties: residue-free, repeatable, tunable, controllable and silent adhesion; self-cleaning; and breathability. However, designing dry fibrillar adhesives is limited by a template-based-design-approach using a pre-determined bioinspired T- or wedge-shaped mushroom tip. Here, a machine learning-based computational approach to optimize designs of adhesive fibrils is shown, exploring a much broader design space. A combination of Bayesian optimization and finite element methods creates novel optimal designs of adhesive fibrils, which are fabricated by two-photon-polymerization-based 3D microprinting and double-molding-based replication out of polydimethylsiloxane. Such optimal elastomeric fibril designs outperform previously proposed designs by maximum 77% in the experiments of dry adhesion performance on smooth surfaces. Furthermore, finite-element-analyses reveal that the adhesion of the fibrils is sensitive to the 3D fibril stem shape, tensile deformation, and fibril microfabrication limits, which contrast with the previous assumptions that mostly neglect the deformation of the fibril tip and stem, and focus only on the fibril tip geometry. The proposed computational fibril design could help design future optimal fibrils with less help from human intuition." @default.
- W3195479901 created "2021-08-30" @default.
- W3195479901 creator A5009766877 @default.
- W3195479901 creator A5076326404 @default.
- W3195479901 creator A5079968392 @default.
- W3195479901 date "2021-08-19" @default.
- W3195479901 modified "2023-10-14" @default.
- W3195479901 title "Machine Learning‐Based and Experimentally Validated Optimal Adhesive Fibril Designs" @default.
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- W3195479901 doi "https://doi.org/10.1002/smll.202102867" @default.
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- W3195479901 hasPublicationYear "2021" @default.
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