A research team at Tufts University Biomedical Engineering Department have extended RFID (radiofrequency ID) technology to a smaller package that can read and transmit information on its environment - whether that be a tooth, skin, or a different surface. The sensors range from 4mm by 4mm to 2mm by 2mm, which can be mounted onto a tooth for the purpose of tracking and monitoring what we eat. Currently, the sensor can monitor salt, glucose, and alcohol intake which the sensor then communicates wirelessly to a mobile device that tracks the data.
The mechanism consists of three layers with a central biosensor layer that reacts to certain chemicals. The complete unit forms a RFID antenna so that when RF signals are transmitted to the device, some of the signals are absorbed by the antenna while the rest reflect back.
This tooth sensor could be a useful tool to help monitor people's dietary intake for health purposes. Researchers hope to modify the bioresponsive layer to target a wider range of chemicals.