More precise than fingerprint recognition: the era of "sweat" is coming soon

Release date: 2014-05-07

The fingerprint is out of date, and now it is the era of "sweat". Researchers have developed a polymer that permanently changes from blue to red when exposed to water, and even the water secreted by micron-sized sweat gland pores on the fingertips of the human finger can make it Produce a reaction. This allows the sweat-producing pores to be distinguished from the relatively dry areas around them. These sweat gland pores at tiny boundaries can help build fingerprints, and by presenting more detailed information for fingerprinting, the researchers published the results online in the recently published Nature-Communication.

The shape of each person's sweat gland pores is permanent, unique and eternal, so the team believes that the construction of sweat gland pores will be a major boost to forensic identification. Although high-resolution scanners can also identify the arrangement of sweat gland pores, the use of water-sensitive polymers can distinguish between active sweat gland pores and inactive sweat gland pores.

Moreover, since most of the sweat gland pores do not change from an active state to an inactive state, the difference in activity of the sweat gland pores helps to further narrow the identification range. Future research will reveal whether it is beneficial to map the sweat gland pores, but the researchers say that only one fingerprint portion containing 20 to 40 sweat gland pores can accurately infer the identity of the owner.

Source: Chinese Journal of Science

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