Using a micro-3D-printing technique, researchers were able to print detailed robotic parts that are smaller than the diameter of a human hair and display color-expressing features for microrobot tracking and identification.
![Microrobots show their true colors](https://www.advancedsciencenews.com/wp-content/uploads/2020/04/lkh.jpg)
Using a micro-3D-printing technique, researchers were able to print detailed robotic parts that are smaller than the diameter of a human hair and display color-expressing features for microrobot tracking and identification.