What is it about?
a fully biodegradable ferroelectric nanogenerator‐driven skin sensor with ultrasensitive bimodal sensing capability based on edible porcine skin gelatine is demonstrated. The microstructure and molecular engineering of gelatine induces polarization confinement that gives rise the ferroelectric properties, resulting in a piezoelectric coefficient (d33) of ≈24 pC N−1 and pyroelectric coefficient of ≈13 µC m−2K−1, which are 6 and 11.8 times higher, respectively, than those of the conventional planar gelatine. The ferroelectric gelatine skin sensor has exceptionally high pressure sensitivity (≈41 mV Pa−1) and the lowest detection limit of pressure (≈0.005 Pa) and temperature (≈0.04 K) ever reported for ferroelectric sensors. In proof‐of‐concept tests, this device is able to sense the spatially resolved pressure, temperature, and surface texture of an unknown object, demonstrating potential for robotic skins and wearable electronics with zero waste footprint.
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Why is it important?
High‐performance biodegradable electronic devices are being investigated to address the global electronic waste problem.
Perspectives
Most existing electronic devices are non‐decomposable, leading to the generation of large volumes of electronic waste (e‐waste) (53.6 million tonnes in 2019 and an expected 74.7 million tonnes by 2030 worldwide), which is threatening the health of ecological systems. Hence, transient and ingestible electronics made from completely biodegradable and edible materials are particularly attractive. Such devices can be completely degraded by decomposition and digestion processes after a certain period of use, thus reducing the amount of e‐waste produced.
Dr. Sujoy Kumar Ghosh
NEST, Istituto Nanoscienze-CNR,Pisa, Italy
Read the Original
This page is a summary of: A Fully Biodegradable Ferroelectric Skin Sensor from Edible Porcine Skin Gelatine, Advanced Science, May 2021, Wiley,
DOI: 10.1002/advs.202005010.
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