ShareAs most people know, when you touch something, you leave fingerprints behind. Those fingerprints are composed of sweat found in pores on the ridges of the surface of your finger. For a long time people have examined the shape of those fingerprints. But what about examining the chemical composition of that sweat?
Apparently researchers can now use gold nanoparticles to analyze the components of fingerprint sweat (http://www.newscientisttech.com/article.ns?id=dn11887).
So basically forensic science can figure out what substances you have been consuming from your fingerprints. Police may use this to narrow their list of suspects to the smoker, coffee drinker or drug addict. Or competitive athletes may find themselves barred from a sporting event after their fingerprint is analyzed.
The true power of this technology would be for the lid of your talking cookie jar. “No Mr. Anderson, you may not open me, because you have already eaten enough.”
Of course this can all be foiled with gloves.
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