Background

Food safety poses a threat to public health and raises serious concerns worldwide. Contaminants include various substances such as pathogens, toxins, pesticides and heavy metals. Therefore, food safety detection is an urgent need. Recently, dual-mode sensors have ensured the accuracy of assay results by integrating two signals into one, demonstrating their potential application in primary food safety screening tests and quantitative assays. In particular, visible optical signals from dual-mode sensors can satisfy the need for onsite contaminant monitoring. Although dual-mode sensors have been an area of growing interest, the design strategies for sensors tailored to food contaminants are rarely highlighted and discussed.

Scope and approach

Herein, we review the five-year progress in dual-mode optical detection methods for food contaminants. In particular, this article focuses on exploring the various sensing performances of dual-mode sensors, including the types, sensing principles, advanced design strategies, and applications. Finally, the current challenges and future developments in dual-mode sensors are briefly discussed.

Key findings and conclusions

Integrated dual-mode optical sensors have received considerable attention regarding food safety. Compared with a single signal, the multichannel biosensor can essentially eliminate the influence of the complex food matrix and reduce false positives and negatives; signals can be statistically tested to verify the reliability of the results.

中文翻译：

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用于食品安全检测的集成双模光学传感器的最新进展

背景

食品安全对公众健康构成威胁，并引起全世界的严重关注。污染物包括各种物质，例如病原体、毒素、杀虫剂和重金属。因此，食品安全检测刻不容缓。最近，双模式传感器通过将两个信号集成为一个信号来确保测定结果的准确性，展示了它们在初级食品安全筛选测试和定量测定中的潜在应用。特别是，来自双模传感器的可见光信号可以满足现场污染物监测的需要。尽管双模式传感器已成为人们越来越感兴趣的领域，但很少有人强调和讨论针对食品污染物量身定制的传感器设计策略。

范围和方法

在此，我们回顾了食品污染物双模式光学检测方法的五年进展。特别是，本文重点探讨双模传感器的各种传感性能，包括类型、传感原理、先进的设计策略和应用。最后，简要讨论了双模传感器当前面临的挑战和未来的发展。

主要发现和结论

集成双模光学传感器在食品安全方面受到了相当大的关注。与单一信号相比，多通道生物传感器可以从根本上消除复杂食物基质的影响，减少假阳性和假阴性；可以对信号进行统计测试，以验证结果的可靠性。