• Client

    City University of Hong Kong

  • Services

    For drugs delivery in human body

  • Technologies

    Medical technology

  • Dates



A tale minor, delicate robot with caterpillar-like legs equipped for conveying overwhelming burdens and versatile to unfavorable condition was produced from an exploration driven by City University of Hong Kong (CityU). This smaller than usual conveyance robot could clear route for therapeutic innovation headway, for example, drugs conveyance in human body.


Around the globe, there has been examine about growing delicate milli-robots. In any case, the CityU's new plan with multi-legs diminishes erosion fundamentally, so the robot can move productively inside surfaces inside the body fixed with, or totally submerged in, body liquids, for example, blood or bodily fluid.


The examination discoveries have been distributed in the most recent issue of the logical diary Nature Communications, titled "A Bio-roused Multilegged Soft Millirobot that Functions in Both Dry and Wet Conditions."


Bio-propelled robot structure


What makes this milli-robot emerge is its several under 1 mm since quite a while ago pointed legs that resembles short minor hair. This interesting plan was not an irregular decision. The examination group has considered the leg structures of several ground creatures incorporating those with 2, 4, 8 or more legs, specifically the proportion between leg-length and the hole between the legs. Furthermore, from that point, they got their motivation.


"Most creatures have a leg-length to leg-hole proportion of 2:1 to 1:1. So we chose to make our robot utilizing 1:1 extent," clarifies Dr Shen Yajing, Assistant Professor at CityU's Department of Biomedical Engineering (BME), who drove the examination.


The robot's body thickness estimates roughly 0.15 mm, with each funnel shaped leg estimating 0.65 mm long and the hole between the legs estimating around 0.6 mm, making the leg-length-to-hole proportion around 1:1. Additionally, the robot's pointed legs have enormously diminished their contact zone and subsequently the erosion with the surface. Research facility tests demonstrated that the multi-legged robot has 40 times less grinding than a limbless robot in both wet and dry condition.


Aside from the multi-leg structure, the materials additionally matter. The robot is manufactured with a silicon material called polydimethylsiloxane (PDMS) installed with attractive particles which empowers it to be remotely controlled by applying electromagnetic power. "Both the materials and the mutli-leg configuration enormously enhance the robot's hydrophobic property. Additionally, the rubbery piece is delicate and can be sliced effectively to frame robots of different shapes and sizes for various applications," says Professor Wang Zuankai at CityU's Department of Mechanical Engineering (MNE) who imagined this examination thought and started the joint effort among the specialists.


Moving quiet in cruel condition


Controlled by an attractive controller utilized in analyses, the robot can move in both a fold impetus design and a reversed pendulum design, implying that it can utilize its front feet to fold forward and in addition swinging the body by remaining on the left and right feet then again to progress separately.


"The tough surface and changing surface of various tissues inside the human body make transportation testing. Our multi-legged robot demonstrates a noteworthy execution in different territories and consequently open wide applications for medication conveyance inside the body," says Professor Wang.


The exploration group additionally demonstrated that when confronting an obstruction ten times higher than its leg length, the robot, with its deformable delicate legs, is fit to lift up one end of its body to frame a point of up to 90-degree and cross the snag effortlessly. What's more, the robot can expand its speed by expanding the electromagnetic recurrence connected.


The robot likewise demonstrates an exceptional stacking capacity. Lab tests demonstrated that the robot was equipped for conveying a heap 100 times heavier than itself, a quality equivalent to an insect, one of the most grounded Hercules in nature, or to a person ready to effectively lift a 26-situated scaled down transport.


The incredibly solid conveying capacity, productive velocity and great snag crossing capacity make this milli-robot to a great degree appropriate for applications in an unforgiving domain, for instance conveying a medication to an assigned spot through the stomach related framework, or doing medicinal examination," includes Dr Shen.


Prior to directing further tests in creatures and in the end in people, the examination groups are further creating and refining their exploration in three perspectives, to be specific finding a biodegradable material, contemplating new shapes, and including additional highlights.


"We are wanting to make a biodegradable robot in the following a few years so it will break down normally after its prescriptions conveyance mission," says Dr Shen.


The co-first creators of the paper are Lu Haojian from BME Department and Dr Zhang Mei from MNE Department of CityU. The other co-creators incorporate Yang Yuanyuan from BME Department of CityU, and Professor Huang Qiang and Professor Toshio Fukuda from the Beijing Institute of Technology.