Research

This study introduces a whisker sensor with adjustable stiffness using a jamming actuator and 3D-printed tetrapod particles. By tuning stiffness via vacuum pressure and embedded high-modulus materials, the sensor achieves a wide measurement range and high sensitivity. Sensitivity varies from 93 mm/N (0–70 mN) to 65 mm/N (140–220 mN) depending on pressure. This innovation enhances adaptability, enabling applications in exploration requiring variable force sensing.

This study enhances PDMS micro check valves using 3D printing for improved fluid control. By integrating 3D valve disks, particularly cone-shaped designs, the blocking pressure performance increased by 58.33% over traditional designs. Simulations and experiments confirmed the benefits of 3D-structured valves in passive microfluidic systems. This work highlights the potential of 3D printing for optimizing check valves in biomedical and diagnostic applications.

This study develops a modular soft actuator with snakeskin-inspired scales for anisotropic friction and enhanced mobility. Using a DLP 3D printer, a single pneumatic actuator unit integrates precise connections and scales, eliminating extra pumps. Movement varies with scale angles, and adding modules improves locomotion on diverse terrains. A tong-like structure enables object transport 2.5 times the robot’s weight.

This study develops a wireless crawling soft microrobot powered by induction heating. A built-in magnetic composite heater induces fluid evaporation, generating pressure that bends the elastomer-based robot. Movement occurs through cyclic heating and cooling, exploiting friction differences between its legs. The robot achieved 103% of its body length in nine cycles. Made of biocompatible materials, it holds potential for in-body and narrow-pipe exploration.

This study enhances wireless power transfer for soft actuators using 3D helical micro inductors. Unlike traditional 2D spiral inductors, the 3D structure increases magnetic flux linkage, improving heating efficiency. A 3D-printed soluble mold enabled the fabrication of a helical coil heater, achieving a 176.1% higher temperature and extending actuator stroke by 522% compared to 2D designs. This approach advances wireless soft robots by eliminating bulky batteries.