Materials
A new class of functional materials – including advanced piezoelectrics, triboelectric composites, elastomeric thin fi lms, high-k ceramics and bio-integrated polymers – is reshaping how future implantables and body-worn sensors will generate power, sense strain and pressure, and interact with tissue. As these materials mature beyond laboratory prototypes, Sara Harris examines if they offer the potential for self-powered implants, ultra-long-life physiological sensors and mechanically adaptive bio-interfaces.
Powering the body F
or decades, the limitations of medical devices have been defined less by what electronics can do, and more by what materials will allow; batteries dictate lifetime, rigid housings constrain placement, and interfaces between device and tissue degrade over time, reducing signal quality or triggering adverse responses. Now, a new generation of functional materials is beginning to shift those constraints. From advanced piezoelectrics and triboelectric composites to elastomeric thin films, high-k ceramics and bio- integrated polymers, these materials are enabling devices that do more than measure. They can harvest energy, conform to tissue and maintain performance under continuous mechanical stress.
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Much of the early promise of these technologies centred on a single idea: self-powered medical devices. That vision is still intact, but it is becoming more nuanced. Rather than fully eliminating batteries, functional materials are increasingly being positioned as part of hybrid systems that extend device lifetime, improve sensing fidelity and enable new form factors. As these materials move beyond laboratory prototypes, the question is no longer whether they can work, but where they can deliver meaningful clinical and commercial value.
Redefining power at the material level Mechanical energy harvesting sits at the centre of the current innovation cycle. Piezoelectric and
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