Biodegradable sensors developed to cut e-waste and monitor air pollution

Researchers at Incheon National University have developed biodegradable gas sensors designed to reduce electronic waste while improving air quality monitoring. The technology targets nitrogen dioxide, a pollutant linked to fossil fuel combustion and respiratory diseases.

The sensors are built using organic field-effect transistors, a lightweight and low-energy alternative suited for portable environmental monitoring devices. OFET-based systems are also easier to manufacture compared with traditional silicon electronics.

To create the sensing layer, the research team blended an organic semiconductor polymer, P3HT, with a biodegradable material, PBS. Each polymer was prepared separately in chloroform before being combined into a uniform solution.

Performance varied with solvent composition, with mixtures of chloroform and dichlorobenzene yielding the most consistent and sensitive sensor structures. High PBS concentrations remained effective without compromising detection accuracy.

Project lead Professor Park said the approach balances sustainability and performance, particularly for use in natural environments. The biodegradable design could contribute to long-term pollution monitoring and waste reduction.

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