Fluorescent quantum dots are widely used in biological imaging due to their bright and stable fluorescence. They enable high-resolution tracking of cellular processes and molecular interactions. In medical diagnostics, they serve as sensitive probes for detecting diseases, including cancer, by targeting specific biomarkers. Quantum dots are also applied in optoelectronics, enhancing the performance of devices like LEDs, solar cells, and displays by improving color purity and energy efficiency. Additionally, they play a role in environmental monitoring, where they detect pollutants and toxins with high specificity. Their tunable optical properties make them versatile for advanced research and technological applications.