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Semiconductor quantum dots (QDs) are one of the most popular luminescent labels that are widely used in food and medical analysis. Their unique optical properties establish QDs as excellent tools for highly sensitive biosensors based on Förster resonance energy transfer (FRET). To provide a convenient analytical system with long-term optical stability, a FRET pair consisting of QDs as energy donor and gold nanoparticles (GNs) as energy acceptor was developed. Careful selection of donor and acceptor properties allowed to achieve a large