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Droplets Manipulated on Photothermal Organogel Surfaces

机译：在光热有机凝胶表面上处理的液滴

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摘要

A photoresponsive organogel surface (POS), which integrates characteristics of the photothermal property of Fe3O4 nanoparticles and the low hysteresis feature of lubricant-infused organogels, is shown. A photothermally induced dynamic temperature gradient can be formed rapidly at the location of near-infrared-light irradiation (NIR) on POS with suitable Fe3O4 nanoparticles content. Thus, various droplets (e.g., water, glycerol, ethylene glycol, propylene glycol, and ethanol) can be transported effectively and nimbly (e.g., along desired trajectories with controllable velocity and direction, even run uphill and deliver solid particles). This work reveals a synergistic effect between the asymmetrical droplet deformation and the inside Marangoni flows, which forms a unique driving force for droplet transport with high efficiency. This finding offers insight into the design of novel responsive interface materials for droplet transportation, which would be significant for laboratory-on-a-chip contexts, mass transportation, and microengines.
机译：显示了一种光响应性有机凝胶表面（POS），该表面整合了Fe3O4纳米颗粒的光热特性和注入润滑剂的有机凝胶的低滞后特性。可以在具有合适的Fe3O4纳米粒子含量的POS上的近红外光照射（NIR）位置迅速形成光热诱导的动态温度梯度。因此，各种液滴（例如水，甘油，乙二醇，丙二醇和乙醇）可以被有效而灵活地运输（例如，沿着具有可控制的速度和方向的期望轨迹，甚至上坡并输送固体颗粒）。这项工作揭示了不对称液滴变形与内部Marangoni流之间的协同效应，这形成了高效的液滴运输的独特驱动力。该发现提供了对用于液滴运输的新型响应界面材料的设计的见解，这对于芯片实验室环境，大规模运输和微引擎具有重要意义。

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  • 来源
    《Advanced Functional Materials》 |2018年第35期|1803072.1-1803072.7|共7页
  • 作者

    Gao Chunlei; Wang Lei; Lin Yucai; Li Jitong; Liu Yufang; Li Xin; Feng Shile; Zheng Yongmei;

  • 作者单位

    Beihang Univ BUAA, Sch Chem, Minist Educ, Key Lab Bioinspired Smart Interfacial Sci & Techn, Beijing 100191, Peoples R China;

    Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Cryobiomed Engn, Beijing 100190, Peoples R China;

    Beihang Univ BUAA, Sch Chem, Minist Educ, Key Lab Bioinspired Smart Interfacial Sci & Techn, Beijing 100191, Peoples R China;

    Beihang Univ BUAA, Sch Chem, Minist Educ, Key Lab Bioinspired Smart Interfacial Sci & Techn, Beijing 100191, Peoples R China;

    Beihang Univ BUAA, Sch Chem, Minist Educ, Key Lab Bioinspired Smart Interfacial Sci & Techn, Beijing 100191, Peoples R China;

    Beihang Univ BUAA, Sch Chem, Minist Educ, Key Lab Bioinspired Smart Interfacial Sci & Techn, Beijing 100191, Peoples R China;

    Beihang Univ BUAA, Sch Chem, Minist Educ, Key Lab Bioinspired Smart Interfacial Sci & Techn, Beijing 100191, Peoples R China;

    Beihang Univ BUAA, Sch Chem, Minist Educ, Key Lab Bioinspired Smart Interfacial Sci & Techn, Beijing 100191, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    droplet manipulation; gradients; organogels; photoresponsive surfaces;

    机译：液滴操纵;梯度;有机凝胶;光响应表面;

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