【抗癌的军队？磁力机器人群可以对抗疾病】来自德国汉堡飞利浦研究院的科学家们在 Science Robotics 介绍了一种新的微型机器人技术，使得哪怕处于同一磁场影响下，也可以驱动某个或某群微型机器人运动。未来的医学领域或可通过控制微型机器人进入体内精准投放药物、消灭肿瘤以及进行其他复杂的操作。
Cancer-killing robots could one day be injected into our bodies and controlled using magnets to fight disease
Our bodies are full of immune cells that circle around the blood, ready to see off any invaders.
And soon they could be getting a helping hand from tiny disease-fighting robots.
Scientists have created an army of magnetically-controlled robots which they say could help our bodies fight off diseases such as cancer.
The robots have been designed by researchers from Philips Innovative Technologies in Hamburg.
Researchers can control the movement of each microscopic bots by making use of powerful magnetic fields.
Tiny magnetic screws are frozen into place using strong magnetic forces.
But the researchers deliberately left 'weak spots' inside the magnetic field so that the immobilised screws were free to spin around.
This allowed the researchers to attach tiny movable limbs to the screws, which can each be controlled independently.
Hundreds of the tiny bots have been created, which are all capable of being controlled independently.
'One could think of screw-driven mechanisms that perform tasks inside the human body without the need for batteries or motors,' Jürgen Rahmer, a physicist at Philips Innovative Technologies in Hamburg, told Live Science.
'Our method may enable complex manipulations inside the human body.'
So far the magnetic screws have been tested on Lego robots, allowing the bots to swing their limbs independently.
But the researchers believe the robot swarm could one day be injected to help our bodies fight off cancer.
They suggested that the robot swarms could be hidden inside microscopic pills that can be injected into the blood.
The pills could travel through the body harmlessly until they reach a cancerous tumour.
Doctors could then manipulate the robots to open up the pill and start killing off the tumour cells by delivering doses of radiation.
Once the tumour has been destroyed, the scientists could shut the swarm down using the magnetic forces.
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