Bio‑Friendly Transistors That Stick and Perform

A new coating turns ordinary organic transistors into bio‑friendly devices. The trick is a thin, flexible hydrogel layer that fits snugly around the transistor’s channel made of special polymers. This layer lets the device stay attached to wet tissues and stops it from swelling, which normally weakens performance. As a result, the transistors run twice as well as uncoated ones and keep working smoothly for more than 1, 800 cycles.

When wired into a soft circuit, they boost signals by over 200 times and use only micro‑watts of power. Tests on living brain tissue show the system picks up signals with a clear signal‑to‑noise ratio of 28 dB, better than many standard electrodes. The work blends soft gel mechanics with advanced electronics to create a stable, high‑quality interface for medical devices.

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