Without the removal of fingerprints, almost no criminal investigation is possible. Special powders are still used for this. However, they often can not cope with the task, because prints do not always remain as a fat fingerprint, but also as a residue of amino acids and other compounds to which the powder adheres poorly.
A new method of fingerprinting was developed by the scientists of the Advisory Council for Science and Industry of Australia (CSIRO) under the guidance of Dr. Kang Liang. With his help, “fingers” will be visible even in the absence of dust, and in the ultraviolet light they will also glow.
In the process of work, Kang Liang’s attention was attracted 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, completely repeating the fingerprint, which also begins to glow in the UV rays, creating a high-resolution image.
By changing the chemical composition of the substance, it is possible to obtain prints of various colors. For identification on-site, a special digital device is used that is associated with the database in real time. Dr. Liang, speaking about the significance of his research, noted:
“The probability of error in our method is very small, since we work at the molecular level.”