India, Jan. 9 -- The Government of India has issued a release:

A flexible, low-cost multipurpose pencil on paper sensor developed could carry out activities ranging from measuring soil moisture, detecting plant drought stress, tracking human breathing patterns, to acting as smart diaper wetness detector.

Sensors are a part of everyday life today. They are present in phones and smartwatches and required in hospitals and farms. But most conventional sensors are built on rigid materials, use costly metals like gold or platinum, and require complex manufacturing processes. This makes them expensive, unscalable, and hence unsuitable for large-area applications such as agriculture or wearable health monitoring.

Research, carried out by Dr. Hem...