A groundbreaking paper by researchers from Huazhong University of Science and Technology (HUST), titled "Mechanoelectrical metamaterials for broad-range, high-sensitivity pressure sensing", was published in Science on June 11.

The first authors of the paper are Yang Feifan, a PhD student from the School of Integrated Circuits, and Yang Haoming, a PhD student from the School of Aerospace Engineering. The corresponding authors include Professor Zhang Guangzu from the School of Integrated Circuits and Professor Zhang Yao from the School of Aerospace Engineering, with the HUST School of Integrated Circuits serving as the primary contributing institution.

Traditional pressure sensors face inherent trade-offs in material properties: piezoelectric ceramics and flexible polymers, the two primary materials, suffer from brittleness and low sensitivity.

The research team has developed a novel piezoelectric soft material compatible with photocuring 3D printing, which features a self-adaptive deformation mode. Under light loads, the material uses rod bending for high-sensitivity detection, while under heavy loads, it uses plate compression to ensure durability. This innovative device combines high sensitivity with a high tolerance to load variations, overcoming the limitations of current sensor technologies.

In practical tests, the robot hand, integrally 3D-printed with the new material, detected extremely subtle pressures, such as the weight of a ladybug or a soap bubble. It also withstood impacts from objects weighing up to 5 kilograms, identified the hardness of various materials for fresh produce quality inspection, and, when fashioned into sensing wheels, performed terrain and subsurface detection.

The research provides key theoretical foundations and technical approaches for the development of next-generation robotic tactile systems and portable health monitoring devices.

Source: School of Integrated Circuits, HUST