Despite the improvement in sensing technologies, detection of small and highly reactive molecules like formaldehyde remains a highly challenging area of research. Applications of nanomaterials/nanostructures and their composites have increased as effective sensing platforms (e.g., reaction time, sensitivity, and selectivity) for the detection of aqueous or gaseous formaldehyde based on diverse sensing principles. In this review, the basic aspects of important nanomaterial-based sensing systems (e.g., electrochemical, electrical, biological, and mass variation sensors) were evaluated in relation to performance, cost, and practicality of sensing gas phase formaldehyde. Accordingly, existing knowledge gaps in such applications were assessed in various respects along with suitable recommendations for building a new roadmap for the expansion of chemical sensing technology of gas phase formaldehyde.

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尽管传感技术得到了改进，但是检测小分子和高反应性分子（如甲醛）仍然是一个极富挑战性的研究领域。纳米材料/纳米结构及其复合材料的应用作为基于多种传感原理的水性或气态甲醛检测的有效传感平台（例如，反应时间，灵敏度和选择性）已得到增加。在这篇综述中，评估了重要的基于纳米材料的传感系统（例如，电化学，电，生物和质量变化传感器）的基本方面，涉及传感气相甲醛的性能，成本和实用性。因此，

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