...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Langmuir: The ACS Journal of Surfaces and Colloids >Efficient Propulsion and Hovering of Bubble-Driven Hollow Micromotors underneath an Air-Liquid Interface
【24h】

Efficient Propulsion and Hovering of Bubble-Driven Hollow Micromotors underneath an Air-Liquid Interface

机译：气液界面下方气泡驱动的中空微量器的高效推进和悬停

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Bubble-driven micromotors have attracted substantial interest due to their remarkable self-motile and cargo delivering abilities in biomedical or environmental applications. Here, we developed a hollow micromotor that experiences fast self-propulsion underneath an air-liquid interface by periodic bubble growth and collapse. The collapsing of a single microbubble induces a similar to 1 m.s(-1) impulsive jetting flow that instantaneously pushes the micromotor forward. Unlike previously reported micromotors propelled by the recoiling of bubbles, cavitation-induced jetting further utilizes the energy stored in the bubble to propel the micromotor and thus enhances the energy conversion efficiency by 3 orders of magnitude. Four different modes of propulsion are, for the first time, identified by quantifying the dependence of propulsion strength on micro bubble size. Meanwhile, the vertical component of the jetting flow counteracts the buoyancy of the micromotor-bubble dimer and facilitates counterintuitive hovering underneath the air-liquid interface. This work not only enriches the understanding of the propulsion mechanism of bubble-driven micromotors but also gives insight into the physical aspects of cavitation bubble dynamics near the air-liquid interface on the microscale.
机译：由于生物医学或环境应用中的非凡自动运动和货物提供能力，泡沫驱动的微电子引起了大量兴趣。在这里，我们开发了一种空心的微电机，通过周期性气泡生长和坍塌体现在空气液体界面下方的快速自推进。单个微泡的塌陷诱导类似于1米（-1）脉冲喷射流的A瞬间推动微电机向前推动。与先前报道的微电机推进通过气泡的重塑，空化诱导的喷射进一步利用存储在气泡中的能量以推动微电机，从而提高了3级数量级的能量转换效率。首次通过量化推进强度对微泡尺寸的依赖性来鉴定四种不同的推进模式。同时，喷射流的垂直分量抵消了微量气泡二聚体的浮力，并便于在空气液体界面下方的逆行悬停。这项工作不仅丰富了对泡沫驱动的微电机的推进机制的理解，还可以深入了解微尺寸的空气液界面附近的空化泡沫动力学的物理方面。

著录项

  • 来源
  • 作者

    Wang Lei-lei; Chen Li; Zhang Jing; Duan Jin-ming; Wang Lei; Silber-Li Zhan-hua; Zheng Xu; Cui Hai-hang;

  • 作者单位

    Xian Univ Architecture &

    Technol Sch Environm &

    Municipal Engn Xian 710055 Shaanxi Peoples R China;

    Xian Univ Architecture &

    Technol Sch Environm &

    Municipal Engn Xian 710055 Shaanxi Peoples R China;

    Xian Univ Architecture &

    Technol Sch Environm &

    Municipal Engn Xian 710055 Shaanxi Peoples R China;

    Xian Univ Architecture &

    Technol Sch Environm &

    Municipal Engn Xian 710055 Shaanxi Peoples R China;

    Xian Univ Architecture &

    Technol Sch Environm &

    Municipal Engn Xian 710055 Shaanxi Peoples R China;

    Chinese Acad Sci Inst Mech State Key Lab Nonlinear Mech Beijing 100190 Peoples R China;

    Chinese Acad Sci Inst Mech State Key Lab Nonlinear Mech Beijing 100190 Peoples R China;

    Xian Univ Architecture &

    Technol Sch Environm &

    Municipal Engn Xian 710055 Shaanxi Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 物理化学（理论化学）、化学物理学;化学;
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号