Ultra-thin mesh harnesses heartbeats to power medical implants

University of Massachusetts researchers develop a flexible electronic grid that integrates with living cells, generating electricity from their movements

By LineZotpaper AI staff

Published23 October 2026

Read Time2 min

Researchers at the University of Massachusetts Amherst have created an ultra-thin, flexible electronic mesh that integrates with living human heart cells and converts their mechanical contractions into electricity, achieving more than ten times the energy density of conventional energy-harvesting approaches. The device, described in a study published in Science Advances, offers a potential way to power medical implants and wearables without bulky batteries.

The device, called a biohybrid mesh harvester, consists of numerous tiny ribbons of lead zirconate titanate (PZT), a piezoelectric ceramic that generates an electrical charge when deformed, embedded in an open polymer mesh. When human cardiac cells are grown into the mesh, their contractions compress the PZT ribbons, producing electricity across multiple points in the tissue.

Unlike earlier piezoelectric harvesters, which are typically single devices attached to the surface of tissue, the new architecture distributes hundreds of miniature generators throughout the living structure. The researchers say this distributed design allows for closer mechanical coupling with cellular movements while maintaining the flexibility needed to accommodate biological motion.

“The beauty of this system is how noninvasive and powerful it is,” said Jun Yao, senior author of the study and associate professor at UMass Amherst’s Riccio College of Engineering. “Our bodies want to reject systems that come with bulk batteries, but when the device exists at the cellular level, you get vastly improved biocompatibility.”

The technology remains at an early stage, it has only been tested in laboratory-grown cardiac tissue, not in a living organism. Questions remain about long-term durability, electrical output, and the safety of PZT, which contains lead and would need to be isolated from surrounding tissue.

If successful, the approach could eventually power medical implants such as pacemakers, cardiac monitors, and neurostimulators, as well as wearable health devices. Roughly 120 million US adults, about 46% of the adult population, own wearable devices such as smartwatches and smart rings, according to the 2025 Rock Health Consumer Adoption Survey, all of which rely on batteries that need recharging or replacement.

Analysis

Why This Matters

Medical implants such as pacemakers and neurostimulators currently require periodic battery replacement surgery, which adds cost and medical risk.
Wearable health devices, used by nearly half of US adults, could become smaller and more comfortable if they can be powered by the body's own movements.
The distributed integration approach could also improve biocompatibility by reducing the mechanical mismatch between electronics and soft tissue.

Background

Batteries remain a fundamental limitation for electronic implants and wearables. They add bulk and rigidity, and their finite lifespan means implanted devices eventually require surgical replacement. Scientists have explored various body-energy harvesting methods, including thermoelectric generators (using temperature differences) and piezoelectric generators (using mechanical movement). Previous piezoelectric harvesters were typically single devices attached to tissue surfaces, which limited integration and energy capture. The UMass Amherst team drew inspiration from how living organisms distribute energy production throughout tissues, leading to the mesh architecture.

What to Watch

Testing in living animals to assess performance, safety, and biocompatibility in a real physiological environment.
Long-term durability of both the electronic components and the living tissue integration.
Development of lead-free or properly encapsulated piezoelectric materials to address toxicity concerns.

Sources

Bio-hybrid harvester generates electricity from human cells · New Atlas

Checked

10 claims in this story checked against 1 source: 6 supported.

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Partly supportedThe headline says heartbeats are harnessed to power medical implants.New Atlas: Technology-Innovation-Outdoor News: “The technology could ultimately find applications in medical implants such as pacemakers, cardiac monitoring systems, neurostimulators, and other low-power biointegrated electronics.”
Partly supportedThe device achieved more than ten times the energy density of conventional energy-harvesting approaches.New Atlas: Technology-Innovation-Outdoor News: “In laboratory tests, researchers say the technology achieved more than 10 times the effective energy density of conventional energy-harvesting approaches.”
Partly supportedThe mesh contains hundreds of miniature generators.New Atlas: Technology-Innovation-Outdoor News: “The device, called a biohybrid mesh harvester, features numerous tiny piezoelectric generators distributed across a flexible network that living cells can grow into and around.”
SupportedJun Yao said, “The beauty of this system is how noninvasive and powerful it is.”New Atlas: Technology-Innovation-Outdoor News: ““The beauty of this system is how noninvasive and powerful it is.””
SupportedJun Yao said, “Our bodies want to reject systems that come with bulk batteries, but when the device exists at the cellular level, you get vastly improved biocompatibility.”New Atlas: Technology-Innovation-Outdoor News: ““Our bodies want to reject systems that come with bulk batteries, but when the device exists at the cellular level, you get vastly improved biocompatibility,””
SupportedUMass Amherst researchers created a flexible mesh that integrates with living human heart cells and converts their movements into electricity.New Atlas: Technology-Innovation-Outdoor News: “Researchers at the University of Massachusetts Amherst have developed an ultrathin, flexible electronic mesh that integrates with living human heart cells and converts their mechanical movements into electricity.”
SupportedThe device is made of PZT ribbons embedded in an open polymer mesh, and contractions of cardiac cells deform them to generate electricity at multiple locations.New Atlas: Technology-Innovation-Outdoor News: “As the cardiac cells contracted, they mechanically deformed the embedded PZT ribbons, generating electrical energy through the piezoelectric effect at multiple locations across the tissue.”
SupportedThe technology has only been demonstrated in laboratory-grown cardiac tissue, not in a living organism.New Atlas: Technology-Innovation-Outdoor News: “So far, the researchers have demonstrated it only in laboratory-grown cardiac tissue and have yet to test it in a living organism or show that it can independently power a functional medical implant.”
SupportedRoughly 120 million US adults, about 46% of the adult population, own wearables such as smartwatches and smart rings, according to Rock Health’s 2025 survey.New Atlas: Technology-Innovation-Outdoor News: “with roughly 120 million US adults, about 46% of the adult population, owning wearable devices such as smartwatches and smart rings, according to Rock Health's 2025 Consumer Adoption Survey .”
Partly supportedAll the wearable devices counted rely on batteries that need recharging or replacement.New Atlas: Technology-Innovation-Outdoor News: “Almost every device in these fields has one inherent limitation: reliance on batteries. Batteries take up valuable space, add weight and rigidity, and eventually run out of charge.”