MUMBAI, India, April 17 -- Intellectual Property India has published a patent application (202641042392 A) filed by Sr University, Warangal, Telangana, on April 2, for 'a sustainable efficient nanomaterial for latent fingerprint visualization.'
Inventor(s) include Dr. Mritunjoy Prasad Ghosh; and Ms. Dhriti Kalita.
The application for the patent was published on April 17, under issue no. 16/2026.
According to the abstract released by the Intellectual Property India: "The present invention relates to a sustainable and eco-friendly method for the visualization of latent fingerprints using green-synthesized zinc selenide (ZnSe) quantum dots. More particularly, the invention discloses a process wherein an aqueous extract of Ficus johannis is employed as a natural reducing and stabilizing agent for the controlled synthesis of ZnSe quantum dots. The phytochemical constituents present in the extract facilitate the reduction of zinc and selenium precursors and simultaneously provide surface passivation, thereby yielding stable, biocompatible quantum dots with enhanced photoluminescent properties. The synthesized ZnSe quantum dots exhibit high fluorescence intensity, improved quantum yield, and strong affinity toward constituents of latent fingerprint residues, including amino acids, lipids, and moisture. Upon application to a variety of substrates, including glass, metal, plastic, and paper, the quantum dots selectively adhere to ridge patterns, enabling high-resolution fluorescent visualization under ultraviolet illumination. The disclosed method provides rapid and non-destructive detection of both fresh and aged fingerprints with minimal background interference. In contrast to conventional techniques, the present invention eliminates the use of toxic chemicals, thereby reducing environmental impact and enhancing operational safety. Furthermore, the synthesis process is cost-effective, reproducible, and amenable to large-scale production and field deployment. Accordingly, the invention offers a reliable, efficient, and environmentally benign alternative for latent fingerprint detection, with potential applications in forensic analysis, biometric identification, and anti-counterfeiting systems. Keywords Green synthesis, Zinc selenide quantum dots, Latent fingerprint detection, Photoluminescence, Eco-friendly nanomaterials, Forensic analysis."
Disclaimer: Curated by HT Syndication.
