Emerging Analytical Technologies Based on Various Nano-Structured Materials for Food Analysis

A special issue of Foods (ISSN 2304-8158). This special issue belongs to the section "Food Analytical Methods".

Deadline for manuscript submissions: 20 October 2025 | Viewed by 546

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Guest Editor
College of Food Science and Engineering, Tianjin University of Science and Technology, Tianjin, China
Interests: nanomaterial-based immunosensors; electrochemical biosensors; optical biosensors; molecular imprinting-based bionic biosensors
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Special Issue Information

Dear Colleagues,

In recent years, emerging analytical methodologies leveraging a diverse array of nano-structured materials have transformed the landscape of food analysis. These materials, characterized by their distinctive physical and chemical attributes—such as an elevated surface-to-volume ratio, superior catalytic activity, and enhanced selectivity—have introduced innovative strategies for detecting contaminants, nutrients, and additives in food products. Carbon-based nanomaterials, including graphene and carbon nanotubes, are employed to develop efficient sensing and analytical interfaces. Up-conversion nanoparticles and aggregation-induced luminescence molecules provide stable and sensitive detection signals. These nano-structured materials or nanocomposites offer a versatile platform for complex food analysis, enhancing the accuracy and sensitivity of analytical techniques and meeting the demands for rapid, on-site inspections.

This Special Issue is dedicated to nano-structured materials, incorporating the latest research advancements in food analysis. It summarizes the role of these materials in detecting harmful substances, active ingredients, and other additives in food, thereby guiding their further application in food safety and quality assurance.

Prof. Dr. Mingfei Pan
Guest Editor

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Keywords

  • nano-structured materials
  • food contaminants
  • nutrients
  • food analysis
  • food safety
  • food quality

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Published Papers (2 papers)

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Research

19 pages, 5193 KiB  
Article
Flexible TiO2/ZrO2/AuCNAs Surface-Enhanced Raman Scattering Substrates for the Detection of Asomate in Apple Peel
by Lina Zhao, Zhengdong Sun, Ye Shen, Zhiyang Chen, Yang Zhang, Jiyong Shi, Haroon Elrasheid Tahir, Xuechao Xu, Meng Zhang, Xiaobo Zou and Kaiyi Zheng
Foods 2025, 14(12), 2062; https://doi.org/10.3390/foods14122062 - 11 Jun 2025
Abstract
(1) Background: Asomate, as a dithiocarbamate compound, is moderately toxic to the human body; thus, it is necessary to develop a rapid and efficient method for detection. To meet this need, this study introduced a rapid, non-destructive, and efficient method for detecting asomate [...] Read more.
(1) Background: Asomate, as a dithiocarbamate compound, is moderately toxic to the human body; thus, it is necessary to develop a rapid and efficient method for detection. To meet this need, this study introduced a rapid, non-destructive, and efficient method for detecting asomate residues on the surface of apples based on surface-enhanced Raman spectroscopy (SERS) combined with flexible substrates. (2) Methods: Concave Au nanorods (AuCNAs) were synthesized in advance. Then, the AuCNAs were loaded on an electrostatically spun film to generate a flexible TiO2/ZrO2/AuCNAs substrate for detection. (3) Results: The flexible substrate exhibited strong SERS activity, with an enhancement factor (EF) up to 9.40 × 107 for 4-MBA. Meanwhile, the finite-difference time-domain (FDTD) simulation showed that the localized surface plasmon resonance (LSPR) effects related to the enhancement of the SERS signal are mainly generated from the ‘hot spots’ in AuCNAs. The density functional theory (DFT) simulation detailedly revealed that the SERS peaks could be generated by the interaction among asomate molecules, disassociated Au atoms, and Au facets. Moreover, the asomate in apple peel was analyzed with the limit of detection (LOD) as low as below 10 nM, allowing for the rapid detection of asomate directly on apple peels. (4) Conclusions: The flexible TiO2/ZrO2/AuCNAs film can be used for the in situ detection of asomate in apple peel at low concentrations. Moreover, the simulation methods, including FDTD and DFT, explained the mechanism of SERS from the flexible substrates. Full article
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14 pages, 7899 KiB  
Article
Development and Application of a Rapid Detection Technique for 2-Amino-1-methyl-6-phenyl-imidazo [4,5-b] Pyridine in Meat Products Based on Hydrogel-Molecular-Imprinting Electrochemical Sensing Technology
by Chunxiao Li, Xiaolei Zhao, Xiaofei Yin, Shuting Zhang and Jinxing He
Foods 2025, 14(8), 1292; https://doi.org/10.3390/foods14081292 - 8 Apr 2025
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Abstract
2-amino-1-methyl-6-phenyl-imidazo [4,5-b] pyridine (PhIP) is a harmful compound that is formed during the high-temperature processing of meat products, and the risk of cancer may be increased with the prolonged intake of foods containing high levels of PhIP. This study aimed to develop an [...] Read more.
2-amino-1-methyl-6-phenyl-imidazo [4,5-b] pyridine (PhIP) is a harmful compound that is formed during the high-temperature processing of meat products, and the risk of cancer may be increased with the prolonged intake of foods containing high levels of PhIP. This study aimed to develop an innovative detection method specifically for PhIP in meat products. Utilizing hydrogel-molecular-imprinting electrochemical sensing technology, the preparation conditions of molecularly imprinted hydrogels (MIHs) were optimized. Consequently, a highly selective and rapid detection method for PhIP was successfully established, integrated with an electrochemical workstation. The results indicate that the prepared MIHs exhibit an excellent specific recognition performance for PhIP. The sensor exhibited a linear response within the concentration range of 1.0–200.0 ng/mL, with a detection limit of 0.07 ng/mL (S/N = 3) under optimized conditions. In addition, the accuracy and reliability of the method were verified by spiked recovery experiments, and the recoveries ranged from 75.9% to 108.8%, which demonstrated its high accuracy and potential for practical application. Full article
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