Cell-sized robots can sense their environment

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Made of electronic circuits coupled to minute particles, the devices could flow through intestines or pipelines to detect problems.

Researchers at MIT have created what may be the smallest robots yet that can sense their environment, store data, and even carry out computational tasks. These devices, which are about the size of a human egg cell, consist of tiny electronic circuits made of two-dimensional materials, piggybacking on minuscule particles called colloids.

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