Scientists develop fingerprinting techniques

Scientists from China are developing chemical methods that combine electric current from electronic devices that can keep the fingerprints from gradually shining.

Detailed information published in the Angewandte Chemie last month could help law firms track down fingerprint criminals faster and increase the security of biometric security systems.

Researched and developed at Zhejiang University in Hangzhou, this method is based on the phenomenon of chemistry when encountering electrical currents in English called electrochemiluminescence . When current passes through, chemical phenomena occur, causing the test substance to become excited , and when it returns to its original state, energy is released that produces light, like The spectrum that the naked eye can recognize.

In this case, the fingerprints are first transferred to metal sheets as an electrode before being processed by chemical methods. The fat in the chemical composition of the fingerprint will resist this, so when the current passes through the fingerprints will show up clearly.

The most important thing is that the test results will be taken with a CCD sensor camera, which makes it easier for law enforcement agencies to track the fingerprints. high profile.