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• 12:37, 12 February 2026 Xiaoyue talk contribs created page Fluorescence Sensor for Carbon Quantum Dots: Synthesis, Characterization, and Quality Control (Created page with "== Introduction == Carbon quantum dots (CQDs) are fluorescent nanomaterials that can be formulated into water-based coatings and inks, enabling UV-activated visuals for applications such as exhibition displays, interactive graphics, and covert markings. In this project, we focus on CQDs synthesized from citric acid and urea because the system is low-cost, relatively safe, and easy to prepare with typical teaching-lab equipment, and it commonly yields bright visible fluo...")