Flexible and highly selective NO gas sensor based on direct-ink-writing of eco-friendly graphene oxide for smart wearable application.

Nitrogen dioxide (NO) is a major cause of respiratory disorders in outdoor and indoor environments. Real-time NO monitoring using nonintrusive wearable devices can save lives and provide valuable health data. This study reports a room-temperature, wearable, and flexible smart NO gas sensor fabricated via cost-effective printing technology on a polyimide substrate.

Photoresponse Dimensionality of Organic Field-Effect Transistor.

Organic field-effect transistors have been envisioned for advanced photodetectors because the organic semiconductors provide unique absorption characteristics, low-cost fabrication, or compatibility with flexible substrates. However, the response time of organic phototransistors still does not reach the required application level. Here, we report the photoresponse of copper phthalocyanine phototransistor in a steady state and under pulsed illumination.