The field of forensic investigations has been revolutionized by the development of a water-soluble, non-toxic fluorescent spray that can make fingerprints visible within seconds. This innovative spray, developed by scientists at the Shanghai Normal University (China) and the University of Bath (UK), offers a safer, more effective, and environmentally friendly alternative to traditional forensic methods.
Traditional methods of detecting fingerprints often involve the use of toxic powders or environmentally damaging solvents, which can harm DNA evidence and have negative impacts on the environment. The new dye spray overcomes these limitations by being water-soluble, non-toxic, and capable of rapidly visualizing fingerprints at crime scenes. This development marks a significant advancement in the field of forensic science.
The fluorescent spray contains two colored dyes, namely LFP-Yellow and LFP-Red, which selectively bind to the negatively-charged molecules present in fingerprints. This binding process locks the dye molecules in place and emits a fluorescent glow under blue light, making the fingerprints easily visible. The dyes are based on Green Fluorescent Protein (GFP) found in jellyfish, ensuring biological compatibility and non-interference with DNA analysis.
The fine spray application prevents splashes that could damage prints, offering a cleaner and more precise method compared to traditional powders. Additionally, the spray works quickly and effectively on various surfaces, even rough ones like brick, where capturing fingerprints can be challenging. The availability of two different colors further enhances its versatility, allowing for use on surfaces of different colors.
The scientists behind this innovative spray are optimistic about its potential impact on forensic investigations. Professor Tony James from the University of Bath is confident in its safety, sustainability, and speed compared to existing technologies. Dr. Luling Wu emphasizes the fluorescence properties of the probes, highlighting their effectiveness in binding to fingerprints. Principal investigator Professor Chusen Huang hopes that this technology will significantly improve evidence detection at crime scenes.
The development of a water-soluble, non-toxic fluorescent spray for visualizing fingerprints represents a major breakthrough in forensic science. With its ability to enhance the safety, efficiency, and environmental friendliness of forensic investigations, this innovative spray has the potential to transform the way fingerprints are detected and analyzed in criminal investigations. Collaborations with companies to make these dyes commercially available further underscore the significance of this technological advancement.
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