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Nanomaterial-Based Sensors for Food Safety Analysis

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Nanochemistry".

Deadline for manuscript submissions: 30 June 2026 | Viewed by 622

Special Issue Editors

School of Grain Science and Technology, Jiangsu University of Science and Technology, Zhenjiang 212100, China
Interests: nanomaterials; MOFs; sensors; fluorescence; electrochemistry; food safety
School of Grain Science and Technology, Jiangsu University of Science and Technology, Zhenjiang 212003, China
Interests: immunoassays; biosensing; fluorescence; photothermal; allergens

Special Issue Information

Dear Colleagues,

Nanomaterial-based sensing platforms represent a significant approach to food safety monitoring, enabling rapid, sensitive, and on-site detection of biological and chemical hazards. The development of these advanced sensors represents a vital strategy for public health through the innovative design, synthesis, and functionalization of nanomaterials that provide unique optical and electrochemical properties, facilitating the precise identification and quantification of hazards including pathogens, toxins, pesticides, heavy metal ions, and so on.

This Special Issue highlights advancements that can address the urgent need for on-site, point-of-care testing and all-in-one capabilities to meet requirements. We aim to showcase a selection of reviews and high-quality original research reports providing significant advances in knowledge from research groups worldwide working on nanomaterial-based sensors. Additionally, research demonstrating novel sensing mechanisms, device integration, and all-in-one capabilities is a core focus of this Special Issue. We welcome authors to contribute original research and critical reviews on diverse aspects related to nanomaterial synthesis, sensor design, detection methodologies, and practical applications for comprehensive food safety analysis.

Dr. Qi Zhang
Dr. Shijie Li
Guest Editors

Manuscript Submission Information

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Keywords

  • nanomaterial-based sensors
  • electrochemical/optical sensors
  • pathogen/toxin/pesticide/heavy metal ion detection
  • point-of-care testing
  • on-site
  • all-in-one
  • sensitivity enhancement

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Published Papers (1 paper)

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Research

15 pages, 9401 KB  
Article
Multifunctional Starch-Based Composite Films Embedded with Carbon Dots for pH-Responsive Sensing and Monitoring of Food Freshness
by Xiaoxu Zhang, Chengguo Liu, Xiaoqin Yang, Qian Jiang, Can Liu and Ping Zhao
Molecules 2025, 30(22), 4421; https://doi.org/10.3390/molecules30224421 - 15 Nov 2025
Viewed by 416
Abstract
This study presents the development of a starch-based smart film enhanced with carbon dots (CDs), which exhibits high pH sensitivity for the rapid assessment of liquid food quality. CDs were synthesized from ellagic acid and urea as precursors and incorporated into amylopectin (CA) [...] Read more.
This study presents the development of a starch-based smart film enhanced with carbon dots (CDs), which exhibits high pH sensitivity for the rapid assessment of liquid food quality. CDs were synthesized from ellagic acid and urea as precursors and incorporated into amylopectin (CA) and whole-component starch (CS) matrices, yielding a range of starch-based/CDs composite films. Structural analyses indicated that hydrogen bonding interactions between the CDs and starch molecules not only provided a nano-plasticizing effect-significantly improving film flexibility, as evidenced by a 29.6-fold increase in the elongation at break of the CS/CDs-2 film—but also slightly enhanced the crystallinity by acting as a nucleating agent. The incorporation of CDs markedly improved the electrochemical properties of the films, reducing the electrical impedance by several orders of magnitude and imparting intense blue fluorescence. The fluorescence intensity and current response of the composite film were found to be highly sensitive to pH variations. A strong linear positive correlation (R2 > 0.97) was observed between the current output and pH over the range of 2 to 7. In a simulated orange juice spoilage test, the film effectively distinguished between fresh (pH = 3.38) and spoiled (pH = 2.68) samples based on current signal differences, demonstrating its practical utility. This work offers a novel approach for designing low-cost, biodegradable sensing materials for smart packaging, with promising potential in real-time food freshness monitoring. Full article
(This article belongs to the Special Issue Nanomaterial-Based Sensors for Food Safety Analysis)
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