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Magnetic Control of Tubular Catalytic Microbots for the Transport, Assembly, and Delivery of Micro-objects

机译：管状催化微型机器人的磁性控制，用于微型物体的运输，组装和交付

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摘要

Recently a significant amount of attention has been paid towards the development of man-made synthetic catalytic micro- and nanomotors that can mimic biological counterparts in terms of propulsion power, motion control, and speed. However, only a few applications of such self-propelled vehicles have been described. Here the magnetic control of self-propelled catalytic Ti/ Fe/Pt rolled-up microtubes (microbots) that can be used to perform various tasks such as the selective loading, transportation, and delivery of microscale objects in a fluid is shown; for instance, it is demonstrated for polystyrene particles and thin metallic films ("nanoplates"). Microbots self-propel by ejecting microbubbles via a platinum catalytic decomposition of hydrogen peroxide into oxygen and water. The fuel and surfactant concentrations are optimized obtaining a maximum speed of 275 μm s~(-1) (5.5 body lengths per second) at 15% of peroxide fuel. The microbots exert a force of around 3.77 pN when transporting a single 5 μm diameter particle; evidencing a high propulsion power that allows for the transport of up to 60 microparticles. By the introduction of an Fe thin film into the rolled-up microtubes, their motion can be fully controlled by an external magnetic field.
机译：最近，人们对人造合成催化微型和纳米电动机的开发给予了极大的关注，该电动机可以在推进力，运动控制和速度方面模仿生物学上的对应物。然而，仅描述了这种自行式车辆的一些应用。此处显示了自推进式催化Ti / Fe / Pt卷起微管（微型机器人）的磁控制，该微管可用于执行各种任务，例如在流体中选择性装载，运输和输送微型物体；例如，已证明可用于聚苯乙烯颗粒和薄金属膜（“纳米板”）。微型机器人通过铂催化将过氧化氢分解成氧气和水而喷射出微气泡，从而实现自我推进。优化了燃料和表面活性剂的浓度，在15％的过氧化物燃料下可获得275μms〜（-1）（5.5体长/秒）的最大速度。当运送直径为5μm的单个微粒时，微型机器人会施加大约3.77 pN的力。具有很高的推进力，可输送多达60个微粒。通过在卷起的微管中引入铁薄膜，可以通过外部磁场完全控制它们的运动。

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  • 来源
    《Advanced Functional Materials》 |2010年第15期|P.2430-2435|共6页
  • 作者

    Alexander A. Solovev; rnSamuel Sanchez; rnMartin Pumera; rnYong Feng Mei; rnOliver G. Schmidt;

  • 作者单位

    Institute for Integrative Nanosciences, IFW Dresden Helmholtzstrasse 20, D-01069 Dresden, 01069 (Germany);

    rnInstitute for Integrative Nanosciences, IFW Dresden Helmholtzstrasse 20, D-01069 Dresden, 01069 (Germany) WPI-MANA, National Institute for Materials Science Tsukuba, Ibaraki, 305-0044 (Japan);

    rnBiomaterials Center, National Institute for Materials Science Tsukuba, Ibaraki, 305-0044 (Japan) Division of Chemist7 and Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University 637371 (Singapore);

    rnInstitute for Integrative Nanosciences, IFW Dresden Helmholtzstrasse 20, D-01069 Dresden, 01069 (Germany);

    rnInstitute for Integrative Nanosciences, IFW Dresden Helmholtzstrasse 20, D-01069 Dresden, 01069 (Germany);

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