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Magnetic spray transforms objects into lifesaving robots


Key points from article :

A glue-like magnetic spray can turn pills into mini robots and navigated through the body.

The sprayed objects can be made to roll, flip and crawl using a magnetic field.

M-spray is made from polyvinyl alcohol, gluten and iron particles.

"Spray coating can be removed using an oscillating magnetic field to break it down into powder" - Shen Yajing, Associate Professor.

The remaining powder can be absorbed or excreted by the body.

This could prove useful for delivering pills to a particular location.

Tested by successfully manoeuvring and disintegrating an M-spray-coated drug to a target area in rabbit’s stomach.

With biocompatible components and negligible side effects, it makes a good candidate for biomedical applications.

Research by City University of Hong Kong published in Science Robotics.

Scientists made mini robots that work under magnetic field to deliver pills

Mentioned in this article:


Public Research university.


Journal providing information in the field of robotics.


Principle Investigator and Associate Professor at CityU.