Photo-responsive droplet manipulation slippery lubricant-infused porous surface with ultra-high durability

doi:10.1088/1674-1056/ad0143

中国物理B ›› 2023, Vol. 32 ›› Issue (11): 116801-116801.doi: 10.1088/1674-1056/ad0143

所属专题： SPECIAL TOPIC — Celebrating the 100th Anniversary of Physics Discipline of Northwest University

Photo-responsive droplet manipulation slippery lubricant-infused porous surface with ultra-high durability

Ze-Zhi Liu(刘泽志)^1,2,3, Chen Zhang(张琛)^1,2,3,4,†, Tong Wen(文通)^1,2,3, Hui-Zhu Li(李荟竹)^1,2,3, Wen-Ping Gao(高文萍)^1,2,3, Xin-Kong Wang(王新孔)^1,2,3, Wei Zhao(赵伟)^1,2,3, Kai-Ge Wang(王凯歌)^1,2,3,4, and Jin-Tao Bai(白晋涛)^1,2,3,4,‡

1 State Key Laboratory of Photon-Technology in Western China Energy, Xi'an 710069, China;
2 International Collaborative Center on Photoelectric Technology and Nano Functional Materials, Xi'an 710069, China;
3 Key Laboratory of Optoelectronics Technology in Shaanxi Province, Xi'an 710069, China;
4 Institute of Photonics & Photon Technology, Northwest University, Xi'an 710069, China

收稿日期:2023-07-01 修回日期:2023-10-04 接受日期:2023-10-09 出版日期:2023-10-16 发布日期:2023-11-03
通讯作者: Chen Zhang E-mail:nwuzchen@nwu.edu.cn
基金资助:
Project supported by the National Major Scientific Research Instrument Development Project of China (Grant No. 51927804), the National Natural Science Foundation of China (Grant No. 62275216), and the Science and Technology Innovation Team Project of Shaanxi Province (Grant Nos. S2018-ZC-TD-0061 and 2023-CX-TD-06).

Photo-responsive droplet manipulation slippery lubricant-infused porous surface with ultra-high durability

1 State Key Laboratory of Photon-Technology in Western China Energy, Xi'an 710069, China;
2 International Collaborative Center on Photoelectric Technology and Nano Functional Materials, Xi'an 710069, China;
3 Key Laboratory of Optoelectronics Technology in Shaanxi Province, Xi'an 710069, China;
4 Institute of Photonics & Photon Technology, Northwest University, Xi'an 710069, China

Received:2023-07-01 Revised:2023-10-04 Accepted:2023-10-09 Online:2023-10-16 Published:2023-11-03
Contact: Chen Zhang E-mail:nwuzchen@nwu.edu.cn
Supported by:
Project supported by the National Major Scientific Research Instrument Development Project of China (Grant No. 51927804), the National Natural Science Foundation of China (Grant No. 62275216), and the Science and Technology Innovation Team Project of Shaanxi Province (Grant Nos. S2018-ZC-TD-0061 and 2023-CX-TD-06).

摘要/Abstract

摘要： Photo-responsive slippery lubricant-infused porous surface (SLIPS) for droplet manipulation is flexible, non-contact and non-destructive in droplet manipulation, which has promising applications in flexible robotics, microfluidics, biomedicine, and chemical analysis. However, the repeated manipulations for droplets of SLIPSs are quite limited in the works reported so far, the poor durability of droplet manipulation severely limits the practical application of the surfaces. In this paper, an Fe₃O₄-doped polydimethylsiloxane (PDMS)-based SLIPS is proposed and implemented to achieve ultra-high repeated droplet manipulation numbers under near-infrared ray (NIR) laser irradiation. Firstly, a micron columnar array structure with micro-pits on the top side, as well as, a wall structure out of the array is designed on SLIPS to reserve the lubricant. Secondly, the prototype of the SLIPS is fabricated by a 3-step ultraviolet (UV) lithography, and subsequently immersed in silicone oil for more than 96 h to obtain the ultra-high durability slippery lubricant-infused porous surface (UD-SLIPS). With a power of 25 mW-85 mW NIR laser, the repeated manipulation of microdroplets (≤ 5 μ L) in the scale of 1 cm can exceed more than 3000 times which is far beyond that in previous reports. Finally, the droplet manipulation performance of this photo-responsive UD-SLIPS and the influence of infusion time on durability are investigated. The mechanism of the PDMS swelling effect is found to be the key factor in improving the droplet manipulation durability of SLIPS. The findings of this work would be of great significance for the development of highly durable photo-responsive functional surfaces for droplet manipulation.

关键词: photo-responsive, droplet manipulation, slippery lubricant-infused porous surface (SLIPS), ultraviolet (UV) lithography

Abstract: Photo-responsive slippery lubricant-infused porous surface (SLIPS) for droplet manipulation is flexible, non-contact and non-destructive in droplet manipulation, which has promising applications in flexible robotics, microfluidics, biomedicine, and chemical analysis. However, the repeated manipulations for droplets of SLIPSs are quite limited in the works reported so far, the poor durability of droplet manipulation severely limits the practical application of the surfaces. In this paper, an Fe₃O₄-doped polydimethylsiloxane (PDMS)-based SLIPS is proposed and implemented to achieve ultra-high repeated droplet manipulation numbers under near-infrared ray (NIR) laser irradiation. Firstly, a micron columnar array structure with micro-pits on the top side, as well as, a wall structure out of the array is designed on SLIPS to reserve the lubricant. Secondly, the prototype of the SLIPS is fabricated by a 3-step ultraviolet (UV) lithography, and subsequently immersed in silicone oil for more than 96 h to obtain the ultra-high durability slippery lubricant-infused porous surface (UD-SLIPS). With a power of 25 mW-85 mW NIR laser, the repeated manipulation of microdroplets (≤ 5 μ L) in the scale of 1 cm can exceed more than 3000 times which is far beyond that in previous reports. Finally, the droplet manipulation performance of this photo-responsive UD-SLIPS and the influence of infusion time on durability are investigated. The mechanism of the PDMS swelling effect is found to be the key factor in improving the droplet manipulation durability of SLIPS. The findings of this work would be of great significance for the development of highly durable photo-responsive functional surfaces for droplet manipulation.

Key words: photo-responsive, droplet manipulation, slippery lubricant-infused porous surface (SLIPS), ultraviolet (UV) lithography

中图分类号: (Surface tension and related phenomena)

68.03.Cd

81.16.Nd (Micro- and nanolithography) 68.08.-p (Liquid-solid interfaces) 42.62.-b (Laser applications)

Ze-Zhi Liu(刘泽志), Chen Zhang(张琛), Tong Wen(文通), Hui-Zhu Li(李荟竹), Wen-Ping Gao(高文萍), Xin-Kong Wang(王新孔), Wei Zhao(赵伟), Kai-Ge Wang(王凯歌), and Jin-Tao Bai(白晋涛). Photo-responsive droplet manipulation slippery lubricant-infused porous surface with ultra-high durability[J]. 中国物理B, 2023, 32(11): 116801-116801.

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Photo-responsive droplet manipulation slippery lubricant-infused porous surface with ultra-high durability

Photo-responsive droplet manipulation slippery lubricant-infused porous surface with ultra-high durability

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