Nanosensors in food safety detection: a comprehensive review of recent advances and future prospects
摘要
The rising prevalence of foodborne risks has generated an urgent demand for portable analytical instruments across the agri-food supply chain. This review systematically examines recent developments in nanosensor technologies by classifying progress according to three key parameters: transduction mechanism (optical, electrochemical, thermal, and magnetic), target analyte (pathogens, toxins, miRNAs), and application context (agri-food chain versus clinical matrices). Advanced plasmonic nanostructures, quantum-dot Förster resonance energy transfer (FRET) systems, and photonic-crystal microcavities enable sub-minute detection of food pollutants. Nanowire field-effect transistors (FETs) with nanoparticle-modified electrodes achieve femtomolar detection limits. Core-shell heteronanoparticles and smartphone-compatible nanopaper devices translate these laboratory capabilities into low-cost, field-ready platforms. Future avenues include self‑powered functionality via triboelectric/piezoelectric energy harvesters, on‑device AI for signal processing, and Internet of Nano Things (IoNT)‑enabled federated analytics—all developed under green chemistry principles and evolving regulatory standards. The convergence of nanomaterials with edge intelligence promises next‑generation autonomous sensors for global food safety assurance.
Graphical abstract