Mechanical energy harvesters are needed for diverse applications, including self-powered
wireless sensors, structural and human health monitoring systems, and the extraction of …

Improved methods are needed for harvesting mechanical energy. Coiled carbon nanotube
yarns, termed twistrons, use stretch-induced changes in electrochemical capacitance to …

Stretching a coiled carbon nanotube (CNT) yarn can provide large, reversible
electrochemical capacitance changes, which convert mechanical energy to electricity. Here …

Artificial muscles are of practical interest, but few types have been commercially exploited.
Typical problems include slow response, low strain and force generation, short cycle life …

Although guest-filled carbon nanotube yarns provide record performance as torsional and
tensile artificial muscles, they are expensive, and only part of the muscle effectively …

Rotary motors of conventional design can be rather complex and are therefore difficult to
miniaturize; previous carbon nanotube artificial muscles provide contraction and bending …

The challenges of textiles that can generate and store energy simultaneously for wearable
devices are to fabricate yarns that generate electrical energy when stretched, yarns that …

By introducing twist during spinning of multiwalled carbon nanotubes from nanotube forests
to make multi-ply, torque-stabilized yarns, we achieve yarn strengths greater than 460 …

Success in making artificial muscles that are faster and more powerful and that provide
larger strokes would expand their applications. Electrochemical carbon nanotube yarn …

Broader applications of carbon nanotubes to real-world problems have largely gone
unfulfilled because of difficult material synthesis and laborious processing. We report high …