Triple-Mode Aptasensor for Sensitive and Reliable Determination of Staphylococcal Enterotoxin B

Advances in Multifunctional Nanoagents and SERS-Based Multimodal Sensing for Biotoxin in Foods

Biotoxins, toxic substances produced by living organisms, are widely present in food and pose a major threat to human health. Traditional detection methods, such as gas chromatography-mass spectrometry (GC-MS) and enzyme-linked immunosorbent assay (ELISA), often suffer from limitations including complex sample preparation, high costs, and lengthy analysis times. In response, surface-enhanced Raman spectroscopy (SERS) has emerged as a highly sensitive and specific analytical tool for the detection of biotoxins. This review highlights the recent progress in multimodal detection technologies based on SERS, focusing on the design and classification of multimodal materials to optimize the construction of SERS substrates. The integration of SERS with other detection modalities, such as fluorescence, colorimetry, and electrochemistry, is discussed to enhance the accuracy and diversity of biotoxin detection. Finally, the review critically assesses the current challenges and future prospects of SERS multimodal detection technology, particularly in real-time food safety monitoring and on-site diagnostics, offering critical insights to guide future research directions.

A Comprehensive Review on Upconversion Nanomaterials-Based Fluorescent Sensor for Environment, Biology, Food and Medicine Applications

Near-infrared-excited upconversion nanoparticles (UCNPs) have multicolor emissions, a low auto-fluorescence background, a high chemical stability, and a long fluorescence lifetime. The fluorescent probes based on UCNPs have achieved great success in the analysis of different samples. Here, we presented the research results of UCNPs probes utilized in analytical applications including environment, biology, food and medicine in the last five years; we also introduced the design and construction of upconversion optical sensing platforms. Future trends and challenges of the UCNPs used in the analytical field have also been discussed with particular emphasis.

Lanthanide ion (Ln3+ )-based upconversion sensor for quantification of food contaminants: A review

The food safety issue has gradually become the focus of attention in modern society. The presence of food contaminants poses a threat to human health and there are a number of interesting researches on the detection of food contaminants. Upconversion nanoparticles (UCNPs) are superior to other fluorescence materials, considering the benefits of large anti-Stokes shifts, high chemical stability, non-autofluorescence, good light penetration ability, and low toxicity. These properties render UCNPs promising candidates as luminescent labels in biodetection, which provides opportunities as a sensitive, accurate, and rapid detection method. This paper intended to review the research progress of food contaminants detection by UCNPs-based sensors. We have proposed the key criteria for UCNPs in the detection of food contaminants. Additionally, it highlighted the construction process of the UCNPs-based sensors, which includes the synthesis and modification of UCNPs, selection of the recognition elements, and consideration of the detection principle. Moreover, six kinds of food contaminants detected by UCNPs technology in the past 5 years have been summarized and discussed fairly. Last but not least, it is outlined that UCNPs have great potential to be applied in food safety detection and threw new insight into the challenges ahead.