Bioresorbable and optically readable triboelectric implants enabled by nanoscale iridophosphors

What happened

Researchers developed bioresorbable triboelectric implants using nanoscale iridophosphors to harvest energy from ultrasound. The device, driven at 20 kHz and 0.5 W cm⁻², generates high-frequency AC output via contact electrification and electrostatic induction. It consists of a PLGA@Ir1b layer, PCL-r-PU spacer, Au electrode, and PLGA substrate. The materials degrade via hydrolysis, and the Ir(III) emitters enable optical readout.

Why it matters

Published in *Nature Nanotechnology* on 14 August 2026, this work enables battery-free, long-term implantable sensors with optical monitoring capabilities. The bioresorbable design eliminates the need for surgical removal, while the machine learning approach accelerates the discovery of efficient emitters.