Almost no criminal investigation is complete without fingerprinting. For this, special powders are still used. However, they often do not cope with the task, since the prints do not always remain as a greasy fingerprint, but also in the form of amino acid residues and other compounds to which the powder does not adhere well.
The new fingerprinting method was developed by scientists from the Advisory Council for Science and Industry of Australia (CSIRO) under the direction of Dr. Kang Liang. With its help, "fingers" will be visible even in the absence of dust, and in ultraviolet light they will also glow.
During the work, Kang Liang's attention was drawn to the organometallic structures of some crystals, which, when applied to the surface, quickly bind to chemical fragments of fingerprints - proteins, peptides, fatty acids and salts. Within 30 seconds, an ultra-thin coating is formed that completely repeats the fingerprint, which also begins to glow in UV rays, creating a high-resolution image.
By changing the chemical composition of a substance, you can get prints of different colors. For on-site identification, a special digital device is used, which is connected to the database in real time. Dr. Liang, speaking of the significance of his research, noted:
"The chance of error in our method is very small because we are working at the molecular level."