Wearable electronics, and health monitoring devices in particular, are of little use without specialized sensors. The ideal sensor should withstand active loads and remain invisible. Especially when it comes to sensors to track a person’s emotional state that cannot be publicly displayed. In this case scientists came with An unobtrusive stress-tracking sensor that clips to the palm of your hand.
Everyone knows that when you are stressed, the palms of your hands tend to sweat, which changes the electrical resistance of the skin. This parameter is easy to measure and interpret with a smartwatch, for example. It is much more difficult to ensure the resistance of the sensor in the palm of the hand to destruction during active activity of a person when his hands are busy with work.
Graphene has become a real discovery for scientists in many fields. It is a thin, lightweight, transparent, and electrically conductive material with suitable strength properties. A research team from the University of Texas at Austin and Texas A&M University joined their colleagues in using graphs to create a reliable electronic tattoo that monitors a person’s stress levels.
The overlay hand sensor – “e-tattoo,” as its developers called it – consists of two serpentine bands, each composed of two partially overlapping layers: a longer graphene band and a short gold band, the near side of which is connected via an interface to smart devices Hours. In fact, a transparent band of graphene runs along the entire palm of the hand, which is not visible even on close inspection and is able to withstand significant loads. Such sensors can be worn in everyday life and do not draw attention to the patient’s emotional problems.
“It’s so subtle that sometimes people forget it’s them [датчики] they are worn, which also reduces the social vulnerability associated with wearing these devices on such prominent parts of the body,” said Nanshu Lu, professor at the Faculty of Aerospace and Mechanical Engineering and project leader.