Scientists at the Technical University of Madrid have
developed a cheap new method of manufacturing optical nanosensors that can
cling to curved surfaces.
The technique may allow for a widespread adoption of skin-worn health monitoring devices for all-day tracking of parameters like body temperature, heart rate, and physical activity.
These nanosensors enable us to measure refractive index variations of the surrounding medium and this can be used to detect chemical substances. Also, they display iridescent colors that can vary according to the viewing and illumination angle. This property facilitates the detection of position variations and surface topography to where they are stuck at a glance.