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Biosensors represent the merging of biology and nanotechnology to develop devices capable of detecting biological molecules, such as proteins, nucleic acids, sugars, antibodies, and enzymes, with high sensitivity and specificity. They combine a bioreceptor (biological element) with a transducer (physical or chemical sensor). These nanosensors have found applications in various fields, including medical diagnostics, drug discovery, environmental monitoring, and food analysis. By intertwining the disciplines of nanotechnology and science, biosensors enable real-time and label-free detection of biomolecules, unlocking new possibilities for disease prevention, treatment, and management.