Applications of nano-biosensor in medical, food safety and environmental

Over time, nanotechnology has ushered in a transformative era for biosensor applications, marking remarkable progress that profoundly reshapes the landscape of biosensor research and development. By leveraging the unique physical, chemical, and biological properties of nanomaterials—such as high surface-to-volume ratios, enhanced conductivity, and superior biocompatibility—this interdisciplinary field has introduced a spectrum of innovative technologies to biosensor design, directly addressing longstanding limitations in sensitivity, selectivity, response speed, and miniaturization. These advancements have not only elevated the overall performance of biosensors but also expanded their applicability across critical sectors. This paper provides a comprehensive review of recent breakthroughs in nanobiosensors, with a focused analysis across three critical domains: medicine, the environment, and food safety. In medicine, nanobiosensors enable early, non-invasive detection of biomarkers for diseases like cancer and diabetes, while in environmental monitoring, they facilitate real-time tracking of heavy metals, pathogens, and toxic pollutants in water and air. Within food safety, these tools offer rapid screening of contaminants, allergens, and microbial spoilage, ensuring stricter quality control. Additionally, the paper critically examines current challenges, such as issues with long-term stability, large-scale manufacturing costs, and regulatory hurdles, before delving into potential future prospects—including the integration of artificial intelligence for data analysis and the development of wearable, implantable nanobiosensor devices—to chart the next phase of this rapidly evolving field.