ArticleJournal of advanced research2026
Aromatic short peptide-metal nanoassemblies in smart hydrogel sensors for real-time food freshness monitoring.
Article in Journal of advanced research, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
introductionThe accumulation of volatile biogenic amines (BAs) during food spoilage constitutes a global economic and public health burden. Conventional BA detection methods based on chromatography and electrochemistry are limited by expensive instrumentation and specialized procedures, making on-site monitoring difficult for supply chain personnel and consumers. The lack of portable, user-friendly sensing technologies for complex food matrices leaves a technological gap for real-time spoilage monitoring.
objectivesThe aim of this study is to develop a hydrogel digital sensor (HDS) based on peptide self-assemblies (PSAs) for visual on-demand BA detection. Quantification of spoilage by smartphone analysis and validation of its efficacy in real-time freshness assessment of meat.
methodsHistidine-rich short peptides were coordinated to Zn
resultsB-PSAs exhibited bright blue fluorescence with quantum yield up to 63 % and selective quenching in the presence of BAs (detection limit: 0.784-3.752 ppm, response time < 60 s). HDS showed a clear white to red fluorescence color transition upon exposure to BAs, enabling quantitative analysis in RGB chromaticity space, with a response range that covered all freshness grades in the national standard. Real-time validation in meat samples confirmed strong correlation with the standard TVBN assay (Pearson coefficient: 0.97).
conclusionThis HDS combines a molecular level design with a user-friendly digital readout to provide a biocompatible, portable, low-cost and rapid spoilage detection platform. The system is expected to improve the efficiency of food supply chain management and provide consumers with a convenient freshness assessment tool.
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