3D Printing of Bioinspired Liquid Superrepellent Structures

Xiaojiang Liu; Hongcheng Gu; Min Wang; Xin Du; Bingbing Gao; Abdelrahman Elbaz; Liangdong Sun; Julong Liao; Pengfeng Xiao; Zhongze Gu

doi:10.1002/adma.201800103

journal article Mar 30, 2018

3D Printing of Bioinspired Liquid Superrepellent Structures

Xiaojiang Liu Hongcheng Gu Min Wang

Xin Du

Bingbing Gao

Abdelrahman Elbaz Liangdong Sun Julong Liao Pengfeng Xiao

Zhongze Gu

Advanced Materials Vol. 30 No. 22 · Wiley

View at Publisher Save 10.1002/adma.201800103

Abstract

AbstractBioinspired re‐entrant structures have been proved to be effective in achieving liquid superrepellence (including anti‐penetration, anti‐adhesion, and anti‐spreading). However, except for a few reports relying on isotropic etching of silicon wafers, most fluorination‐dependent surfaces are still unable to repel liquids with extreme low surface energy (i.e., γ < 15 mN m−1), especially those fluorinated solvents. Herein, triply re‐entrant structures, possessing superrepellence to water (with surface tension γ of 72.8 mN m−1) and various organic liquids (γ = 12.0–27.1 mN m−1), are fabricated via two‐photon polymerization based 3D printing technology. Such structures can be constructed both on rigid and flexible substrates, and the liquid superrepellent properties can be kept even after oxygen plasma treatment. Based on the prepared triply re‐entrant structures, micro open capillaries are constructed on them to realize directional liquid spreading, which may be applied in microfluidic platforms and lab‐on‐a‐chip applications. The fabricated arrays can also find potential applications in electronic devices, gas sensors, microchemical/physical reactors, high‐throughput biological sensors, and optical displays.

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Details

Published: Mar 30, 2018
Vol/Issue: 30(22)
License: View

Authors

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Xiaojiang Liu