In a world invisible to the naked eye, scientists have achieved a major breakthrough. Researchers from the University of Pennsylvania and the University of Michigan have developed the world’s smallest independent robots, smaller than a grain of salt. These microscopic machines do not require motors or wires, instead relying on fluid physics to move and sense.
Article contents:
- Engineering the small world
- Electric swimming
- Energy efficiency
- The dance language
- Medical applications
- Frequently asked questions
Engineering the small world
The robot’s size is about 200 micrometers. The biggest challenge at this scale is that fluids become very viscous, hindering traditional movement. Scientists overcame this by inventing a propulsion system based on electric fields to move ions and push the fluid, allowing the robot to swim with high precision and durability.
Energy efficiency
The robots operate on microscopic solar panels that generate minuscule amounts of energy. To function on this scale, electrical circuits were developed that consume a thousand times less energy than usual, enabling the robot to operate and sense for long periods without the need for external batteries.
The dance language
To communicate and transmit data (such as temperature), the robots perform vibrational movements or “dances” that can be observed under a microscope. This innovative method mimics bee communication and solves the problem of wireless signal transmission at this tiny scale.
Medical applications
This innovation paves the way for robots that swim inside the body to monitor individual cells, deliver medication with extreme precision, or even participate in manufacturing complex microscopic materials.
Frequently asked questions
What is the size of the robot?
Answer: Smaller than a grain of salt.
How does it move?
Answer: Using electricity to propel the surrounding fluid.
What is its benefit?
Answer: Precision medical applications and environmental sensing.
