#soft-robotics

#soft-robotics

The soft, flexible, robotic probe could dramatically improve safety during fetal surgeries, procedures in which physicians operate on a fetus before birth. Currently, doctors primarily rely on intermittent measurements of fetal heart rate using ultrasound imaging from outside the pregnant person's body. The new device, on the other hand, can be gently inserted through the same narrow port already used in fetal surgeries.

Magnetorheological (MR) materials, a class of smart materials that can reversibly change rheological and mechanical properties under magnetic fields15,16,17, are composed of soft magnetic particles within a fluid or elastomeric carrier18,19. Under external magnetic fields, the magnetized particles attract each other through dipole-dipole interaction to form fibre-like structures-known as the MR effect-that increase the viscosity and stiffness of the MR materials20,21. Among these materials, anisotropic MR elastomers with predefined fibre-like soft magnetic structures exhibit directional responses, including sheer stiffening22 and rotational actuation23, to magnetic fields.

Feeding a growing global population while managing limited natural resources presents ongoing challenges for scientists, engineers, farmers and policymakers, the researchers said.