基于飞秒激光制备润滑表面及光响应液滴操控

肖轶; 周丽丽; 徐呈艺; 张瑞华; 吴思竹

doi:10.13801/j.cnki.fhclxb.20200713.003

基于飞秒激光制备润滑表面及光响应液滴操控

doi: 10.13801/j.cnki.fhclxb.20200713.003

肖轶^1,,
周丽丽^2,,
徐呈艺^1,,
张瑞华^1,,
吴思竹^2, ,

1.
南通职业大学机械工程学院，南通 226000
2.
合肥工业大学仪器科学与光电工程学院，合肥 230009

基金项目: 江苏省自然科学基金面上项目（BK20191209）；江苏省高校“青蓝工程”项目；中央高校基本科研业务费专项资金（PA2020GDKC0010）；南通市“226工程”项目（2018-1）

详细信息

通讯作者:
吴思竹，博士，副教授，研究方向为激光微纳制备　E-mail：sizhuwu@hfut.edu.cn

中图分类号: TB381；TB391
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- 文章访问数: 975
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- 被引次数: 0
出版历程
- 收稿日期: 2020-04-07
- 录用日期: 2020-07-10
- 网络出版日期: 2020-07-13
- 刊出日期: 2021-02-15

Preparation of slippery surface based on femtosecond laser toward photo-induced droplet manipulation

XIAO Yi^1
,,
ZHOU Lili^2
,,
XU Chengyi^1
,,
ZHANG Ruihua^1
,,
WU Sizhu^{2
, ,}

1.
College of Mechanical Engineering, Nantong Vocational University, Nantong 226000, China
2.
School of Instrument Science and Opto-electronic Engineering, Hefei University of Technology, Hefei 230009, China

摘要

摘要: 运用光诱导在润滑剂注入型光滑多孔表面(SLIPS)实现液滴动态操控，具有非接触性和不受时空间限制等显著优势，但传统光响应SLIPS制备过程需要模板转印及氟化处理，操作繁琐且不环保。本文利用飞秒激光正交线扫描和光热响应Fe₃O₄纳米颗粒制备出仿猪笼草光热响应SLIPS，通过调整单侧近红外光触发位置，利用液滴润湿梯度和内部马兰格尼流，可以实现液滴运动状态和运动路径的动态操控。通过分析Fe₃O₄含量、润滑剂流变性能及液滴类型对液滴移动速率和响应时间的影响，对制备SLIPS的液滴操控性能进行优化，进而展现仿猪笼草光热响应SLIPS在芯片实验室、微流体反应器、生物医学工程等领域的广泛应用价值。
- 光诱导操控 /
- 飞秒激光一步交叉扫描 /
- 润滑剂注入型光滑多孔表面 /
- 润湿梯度力 /
- Fe₃O₄纳米颗粒
Abstract: The droplet dynamic manipulation on photo-induced slippery lubricant-infused porous surface (SLIPS) has attracted tremendous attention because of its significant merits of contactless stimulation and excellent spatial and temporal control. However, the traditional fabrication methods by a combination of template-transfer and fluorination for a light-driven SLIPS are tedious and not environment-friendly. Accordingly, a kind of Fe₃O₄ nanoparticles(NPs)-doped nepenthes-inspired photothermal SLIPS was fabricated by femtosecond laser cross-scanning rapidly, which could readily steer diverse liquids towards arbitrary directions by utilizing droplet wettability gradient and internal Malangoni flow in the presence of unilateral near-infrared-irradiation-stimuli. Besides, the droplet manipulation performance was optimized by quantitatively analyzing the influence of Fe₃O₄-doped-content, lubricant rheological performance, diverse liquid species on sliding velocity and response time. The smart manipulator for controllable droplet directions and routes can be utilized to give an impetus to the extensive application of lab-on-a-chip, microfluidics and biomedical engineering and so on.
- photo-induced manipulation /
- one-step femtosecond laser cross-scanning /
- slippery lubricant-infused porous surface /
- wettability gradient /
- Fe₃O₄ nanoparticles

HTML全文

图 1 掺杂Fe₃O₄纳米颗粒的润滑剂注入型光滑多孔表面(SLIPS)制备过程 (a) 和飞秒激光刻蚀制备的超疏水微柱阵列薄膜电镜图((b)~(d))

Figure 1. Facile fabrication of Fe₃O₄NPs-doped slippery lubricant-infused porous surface (SLIPS) (a) and SEM images of the as-prepared superhydrophobic micropillar-arrayed film by femtosecond laser cross-scanning ((b)-(d))

PDMS—Polydimethylsiloxane

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图 2 基于近红外响应(NIR)在SLIPS界面进行液滴操控

Figure 2. Droplet manipulation on night-time ozone profile (NIR)-responsive SLIPS

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图 3 无外界近红外刺激 (a) 和有外界近红外刺激时 (b) 润湿梯度差异原理

Figure 3. Mechanism illustration for the wettability gradient variation without (a) and with (b) a unilateral NIR-stimuli

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图 4 Fe₃O₄含量和液滴体积 (a) 及近红外光辐射距离 (b) 对液滴运动的影响

Figure 4. Effect of Fe₃O₄-doped content and droplet volume (a) and irradiation distance (b) on droplet’s motion

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图 5 Fe₃O₄含量 (a) 及液滴体积 (b) 对液滴响应时间的影响

Figure 5. Influence of Fe₃O₄NPs content (a) and droplet volume (b) on droplet’s response time

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图 6 润滑剂黏度 (a) 和表面张力 (b) 对液滴运动的影响(含量为5wt%Fe₃O₄的SLIPS)

Figure 6. Influence of lubricant’s viscosity (a) and surface tension (b) on droplet’s motion (5wt%Fe₃O₄-doped SLIPS)

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图 7 在5wt%Fe₃O₄的SLIPS上受近红外驱使的五种液滴随着表面张力不断增大的平均滑动速度变化

Figure 7. Corresponding variations of NIR-actuating droplet’s average sliding velocity with the increasing of five droplet’s surface tension on 5wt%Fe₃O₄-doped SLIPS

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