SMART PACKAGING DEVELOPMENT OF NANOSENSORS FOR REAL-TIME FOOD SPOILAGE DETECTION: A REVIEW

Abstract

Ensuring food quality and safety throughout the supply chain remains a global priority. Conventional packaging provides only passive protection, lacking the ability to detect or communicate food spoilage in real time. Smart packaging systems incorporating Nanosensor technologies have emerged as an innovative approach to monitor freshness by detecting biochemical and microbial changes within food products. Nanosensors employ advanced nanomaterials—such as gold nanoparticles, graphene, and quantum dots—to identify spoilage-related compounds including biogenic amines, volatile organic compounds (VOCs), and pH variations. Their high surface reactivity and tunable properties enable rapid optical, electrochemical, or resistive signal generation, which can be visualized directly or transmitted wirelessly through NFC, RFID, or Bluetooth interfaces. Recent progress in printing, encapsulation, and biodegradable nanocomposite fabrication has accelerated their integration into polymer and bio-based packaging materials. However, widespread application is still limited by challenges related to sensor drift, selectivity, reproducibility, and potential nanomaterial migration. Regulatory frameworks governing the use of nanomaterials in food contact systems also remain fragmented across jurisdictions. Despite these constraints, opportunities in AI-assisted analytics, self-powered Nanosensors, and sustainable materials are driving the next generation of intelligent packaging. This review summarizes current advances in Nanosensor-enabled smart packaging, evaluates analytical performance, and highlights emerging directions toward scalable, safe, and environmentally responsible food monitoring technologies.