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    • Tiny Grain-Sized Robot Developed in China Monitors Health and Delivers Drugs

    By on September 21, 2025

    Beijing: A team of Chinese scientists has managed to combine sensing and steering functions in one grain-sized machine, creating potential for more accurate drug dosing and in-situ physiological monitoring.

    The researchers from Huazhong University of Science and Technology in central China’s Hubei Province and the Chinese University of Hong Kong in southern China have developed a 1.3-mm-wide magneto-ultrasonic tiny robot that can wirelessly detect and regulate environmental parameters such as force, vibration, viscosity and temperature, according to a report published this week in the journal Science Robotics.

    With the ability to detect stimuli and translate them into ultrasonic signals, this 4.6-milligram robot can also manipulate delicate objects such as salmon eggs, as shown during an animal model test.

    The researchers further demonstrated that a thermometer version of this bot is able to sense temperature changes in a pig model, while a capsule variety of this robot confirmed its ability to deliver precise doses of liquids wirelessly in a live rabbit’s stomach — and could measure the dosage level over time. These tests, notably, have paved the way for real-world applications of this intelligent miniature machine.

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