mattergrasses

Mattergrasses are a class of grass-like, programmable materials used to design adaptive landscapes and morphing structures. The term is found in speculative science and some early-stage research to describe filamentous actuated materials that resemble grasses in appearance and movement.

They consist of slender filaments made from shape memory alloys, electroactive polymers, or composite fibers, embedded in a flexible matrix such as hydrogel or elastomer. Filaments can be arranged in tufted networks or woven strands that sway or bend when stimulated, often with sensors and control fabrics coordinating motion.

They are lightweight with high surface area and tunable mechanical properties. Mattergrasses respond to electric, magnetic, thermal, or optical stimuli, enabling controlled bending, waving, or stiffness changes. Some designs include self-healing capabilities and climate-responsive shading or acoustic modulation.

Fabrication methods include electrospinning, micro- or macro-scale 3D printing, weaving or braiding of anisotropic filaments, and self-assembly within hydrogels. Integration with sensors and microcontrollers supports programmable behavior.

Proposed uses range from architectural shading and adaptive façades to landscape robotics, tactile displays, and space habitat greenery. In research, mattergrasses are explored as a way to substitute rigid actuators with distributed, compliant systems.

The term lacks a single standardized definition, and projects vary in materials, actuation mechanisms, and control strategies. Challenges include durability under outdoor conditions, energy supply, scalability, and reliable control in real-world environments.

Related topics include smart materials, programmable matter, morphing surfaces, and actuated textiles.