Gradient wettability induced by deterministically patterned nanostructures

Min，Siyi1,2; Li，Shijie1; Zhu，Zhouyang1; Li，Wei1; Tang，Xin1; Liang，Chuwei1; Wang，Liqiu1,3; Cheng，Xing2; Li，Wen Di1,3

2020-12-01

10.1038/s41378-020-00215-0

Microsystems & Nanoengineering   影响因子和分区

2055-7434

2055-7434

We report a large-scale surface with continuously varying wettability induced by ordered gradient nanostructures. The gradient pattern is generated from nonuniform interference lithography by utilizing the Gaussian-shaped intensity distribution of two coherent laser beams. We also develop a facile fabrication method to directly transfer a photoresist pattern into an ultraviolet (UV)-cured high-strength replication molding material, which eliminates the need for high-cost reactive ion etching and e-beam evaporation during the mold fabrication process. This facile mold is then used for the reproducible production of surfaces with gradient wettability using thermal-nanoimprint lithography (NIL). In addition, the wetting behavior of water droplets on the surface with the gradient nanostructures and therefore gradient wettability is investigated. A hybrid wetting model is proposed and theoretically captures the contact angle measurement results, shedding light on the wetting behavior of a liquid on structures patterned at the nanoscale.

SCI ; EI

英语

其他

General Research Fund of the Research Grants Council of the Hong Kong Special Administrative Region[17207419][17246116] ; Seed Funding Programme for Basic Research of the University of Hong Kong[201811159244]

Science & Technology - Other Topics ; Instruments & Instrumentation

Nanoscience & Nanotechnology ; Instruments & Instrumentation

WOS:000596303600001

SPRINGERNATURE

20204909568834

Nanoimprint lithography ; Gaussian beams ; Contact angle ; Wetting ; Photoresists ; Laser beams ; Molds

Electromagnetic Waves:711 ; Semiconductor Devices and Integrated Circuits:714.2 ; Laser Beam Interactions:744.8 ; Reproduction, Copying:745.2 ; Nanotechnology:761 ; Coating Materials:813.2 ; Physical Properties of Gases, Liquids and Solids:931.2 ; Solid State Physics:933

2-s2.0-85096876739

Scopus

1.Department of Mechanical Engineering,The University of Hong Kong,999077,Hong Kong
2.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,518052,China
3.HKU-Zhejiang Institute of Research and Innovation (HKU-ZIRI),Hangzhou,311305,China

Min，Siyi,Li，Shijie,Zhu，Zhouyang,et al. Gradient wettability induced by deterministically patterned nanostructures[J]. Microsystems & Nanoengineering,2020,6(1).

Min，Siyi.,Li，Shijie.,Zhu，Zhouyang.,Li，Wei.,Tang，Xin.,...&Li，Wen Di.(2020).Gradient wettability induced by deterministically patterned nanostructures.Microsystems & Nanoengineering,6(1).

Min，Siyi,et al."Gradient wettability induced by deterministically patterned nanostructures".Microsystems & Nanoengineering 6.1(2020).