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Micro-rocket robot with all-optic actuating and tracking in blood.
Light: Science & Applications ( IF 19.4 ) Pub Date : 2020-05-11 , DOI: 10.1038/s41377-020-0323-y
Dengfeng Li 1 , Chao Liu 1 , Yuanyuan Yang 1 , Lidai Wang 1, 2 , Yajing Shen 1, 2
Affiliation  

Micro/nanorobots have long been expected to reach all parts of the human body through blood vessels for medical treatment or surgery. However, in the current stage, it is still challenging to drive a microrobot in viscous media at high speed and difficult to observe the shape and position of a single microrobot once it enters the bloodstream. Here, we propose a new micro-rocket robot and an all-optic driving and imaging system that can actuate and track it in blood with microscale resolution. To achieve a high driving force, we engineer the microrobot to have a rocket-like triple-tube structure. Owing to the interface design, the 3D-printed micro-rocket can reach a moving speed of 2.8 mm/s (62 body lengths per second) under near-infrared light actuation in a blood-mimicking viscous glycerol solution. We also show that the micro-rocket robot is successfully tracked at a 3.2-µm resolution with an optical-resolution photoacoustic microscope in blood. This work paves the way for microrobot design, actuation, and tracking in the blood environment, which may broaden the scope of microrobotic applications in the biomedical field.

中文翻译:

具有全光致动和跟踪血液功能的微型火箭机器人。

长期以来,人们一直期望微型/纳米机器人通过血管到达人体的各个部位,以进行医学治疗或外科手术。然而,在当前阶段,仍然难以在粘性介质中高速驱动微型机器人,并且一旦单个微型机器人进入血流,就很难观察单个微型机器人的形状和位置。在这里,我们提出了一种新型的微型火箭机器人以及一种全光学驱动和成像系统,该系统可以以微尺度分辨率驱动和跟踪血液中的机器人。为了获得高驱动力,我们对微型机器人进行了改造,使其具有类似火箭的三管结构。由于界面设计的原因,在模仿血液的粘性甘油溶液中,在近红外光驱动下,3D打印的微型火箭的移动速度可以达到2.8 mm / s(每秒62体长)。我们还显示,用光学分辨率的光声显微镜在血液中以3.2 µm的分辨率成功跟踪了微型火箭机器人。这项工作为微机器人在血液环境中的设计,启动和跟踪铺平了道路,这可能会拓宽微机器人在生物医学领域的应用范围。
更新日期:2020-05-11
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