Washington State University Unveils High-Resolution Electronic Skin for Prosthetic Limbs

Researchers at Washington State University have created a thin, layered electronic skin that simultaneously measures pressure and temperature on flat and curved prosthetic surfaces. Described in *Cell Reports Physical Science*, the system detects stimuli at a resolution roughly ten times finer than existing commercial glove sensors, allowing differentiation of texture, material properties, and temperature variations.

Electronic skin lets prosthetics sense temperature and pressure,

The device consists of modular sensor “sandwiches” that embed dense arrays of pressure and temperature elements. Each module snaps together with neighboring units, eliminating permanent adhesives. A “scan-model-print” workflow captures the geometry of a prosthetic component, then positions sensors so the skin conforms to free-form shapes. Modules are fabricated through combined 3D printing and laser-cutting, providing high-density coverage without gaps or wrinkles.

Electronic skin lets prosthetics sense temperature and pressure,

Relying on standard 3D-printing and laser-cutting equipment, the researchers argue that production can be scaled at relatively low cost. The modular architecture also simplifies assembly, repair, and reconfiguration for different prosthetic designs. Funding includes support from the National Science Foundation’s Research Traineeship in Next-Generation Robotics (NRT-LEAD) and internal WSU startup and Cougar Cage funds. An invention disclosure for a provisional patent has been filed with the university’s Office of Research Innovation and Entrepreneurship.

Researchers develop electronic skin for prosthetics to sense temperature and pressure

• Resolution: ~10× finer than commercial glove sensors.

Electronic skin lets prosthetics sense temperature and pressure,

• Sensing Modes: Simultaneous pressure and temperature detection across high-density arrays.

Researchers develop electronic skin for prosthetics to sense temperature and pressure

• Form Factor: Thin, conformable layers that maintain performance on curved surfaces.

E-Skin for Prosthetics Senses Temperature and Pressure at 10x Resolution

These specifications address prior e-skins’ limitations of expense, low resolution, and trade-offs between comfort and reliability.

Electronic Skin for Prosthetics Senses Temp and Pressure

Corresponding author Kaiyan Qiu highlighted the simplicity of the manufacturing method, noting its potential to lower costs and improve accessibility for clinical adoption. The team also disclosed ongoing work on an actuator that would translate sensor outputs into nerve stimulation, moving toward tactile feedback for amputees.

E-Skin for Prosthetics Senses Temperature and Pressure at 10x Resolution

• “This approach democratizes the production of medical-grade e-skins, making advanced tactile feedback viable for widespread clinical adoption,” — Hongyi Shen

Researchers develop electronic skin for prosthetics to sense temperature and pressure

• “The scanner basically scans the prosthetic and then, based on the geometry, we map our sensors as a multimodal sensing system with that geometry,” — Kaiyan Qiu

Researchers develop electronic skin for prosthetics to sense temperature and pressure

The researchers are focusing on an actuator capable of converting the e-skin’s pressure and temperature signals into stimulation of nearby nerve endings. Integration of such an actuator could enable amputees to perceive touch through their prosthetic devices, improving confidence and control during everyday tasks. Clinical trials and safety testing will be required before broader deployment.

Electronic skin lets prosthetics sense temperature and pressure,