MUMBAI, India, Feb. 13 -- Intellectual Property India has published a patent application (202541125054 A) filed by Psg Institute Of Technology And Applied Research; Psg Institute Of Advanced Studies; and University Of Madras, Coimbatore, Tamil Nadu, on Dec. 11, 2025, for 'method for the preparation of cysteamine conjugated cholic acid-protected gold nanoclusters with tunable light-emission properties.'
Inventor(s) include Dr. S. Chandirasekar; Dr. N. Rajendiran; and Jofel Jose J.
The application for the patent was published on Feb. 13, under issue no. 07/2026.
According to the abstract released by the Intellectual Property India: "The present invention relates to a simple and controllable method for synthesizing gold nanoclusters (AuNCs) with tunable fluorescence properties using cysteamine-conjugated cholic acid as a stabilizing ligand. The method involves the preparation of cysteamine-conjugated cholic acid through an acid-amine coupling reaction, followed by photo-irradiation induced formation of AuNCs. By varying the molar ratio of the gold precursor to. the ligand, the fluorescence. emission of the resulting nanoclusters can be tuned across a wide range from approximately 580 run to 815 run. The obtained AuNCs are ultra-small (below 2 run) and . showed excellent photostability, making them promising candidates for applications in bioimaging, sensing and diagnostic technologies."
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