Electronic Skin Tattooing!!!!!

I couldn't believe when I first read it........I woke up early and read the newspaper that which was unusual ofcourse.I couldn't help noticing the "Fact of the Day" coloumn. It was about  Electronic Skin. Then i thought........that surely is a wonderful innovation.I browsed the internet for the topic and voila.....it was der..."ELECTRONIC SKIN TATTOOING".It would be cool if people could tattoo something that would read their heart rate,brain waves,temperature.The tattoo is supposed to be temporary and can be removed.

So, there is a flexible electronic circuit which moves with the skin and stay in place without any adhesive. The existing semiconductor technology is used to imprint integrated circuits onto a thin, flexible silicon film that can be applied directly on the skin. The wireless electronic tattoo is a 50-nanometer-thick silicon membrane which is highly flexible and does not required any irritating adhesive gel or tape.

The ultra-flexible patches were made via transfer printing (or “inking and printing”), in which the chips are assembled on two silicon layers and then transferred onto the elastomer polymer base material, which is designed to conform to the skin.

I saw this video on youtube which shows how this stuff works......

This thing is huge possibility in biomedical field as you thought.But it is not really clear that how easily this device can be used to track,spy and monitor peoples activity.This surely can have a lot of controversial issues in fields apart from medical.