It turns out that mixing dark goo with fragments of a neodymium magnet can produce surprisingly interesting results.
This is confirmed by the history presented in Advanced Functional Materials. The publication shows that Li Zhang from the Chinese University of Hong Kong and his team conducted an experiment in which they developed a magnetic robot. The dark, sticky goo may not resemble machines straight from the Terminator, but in the future it may prove to be very useful.
First, however, it is necessary to deal with the key problem, which is the toxicity of the created mixture. Scientists combined a polymer in the form of polyvinyl alcohol, borax and neodymium magnet particles. The latter plays a key role in the movement of the entire robot.
According to Zhang, such solutions could be particularly useful in medicine. How? The robot visible in the above photo is able to encompass and carry objects, taking the shape of the letter C or O. So we can imagine a scenario in which it is used to transport drugs to selected parts of the human body or to extract unwanted, for example swallowed, items.