The development of disposable sensors that can be easily adapted to every analytical problem is currently a hot topic that is revolutionizing many areas of science and technology. The need for decentralized analytical measurements at real time is increasing for solving problems in areas such as environment pollution, medical diagnostic, food quality assurance, etc., requiring fast action. Despite some current limitations of these devices, such as insufficient detection capability at (ultra)trace level and risk of interferent effects due to matrix, they allow low-cost analysis, portability, low sample consumption, and fast response. In the last years, development of paper-based analytical devices has undergone a dramatic increase for on-site detection of toxic metal ions and other pollutants. Along with the great availability of cellulose substrates, the immobilization of receptors providing enhanced recognition ability, such as a variety of nanomaterials, has driven the design of novel sensing approaches. This review is aimed at describing and discussing the different possibilities arisen with the use of different nanoreceptors (e.g., plasmonic nanoparticles, quantum dots, carbon-based fluorescent nanoparticles, etc.) immobilized onto cellulose-based substrates for trace element detection, their advantages and shortcomings.

中文翻译：

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用于环境中痕量金属和阴离子物质光学传感的纳米材料集成纤维素平台


开发可轻松适应每个分析问题的一次性传感器是当前的热门话题，正在给许多科学技术领域带来革命性的变化。为了解决环境污染、医疗诊断、食品质量保证等领域的问题，需要快速采取行动，对实时分散分析测量的需求日益增加。尽管这些设备目前存在一些局限性，例如（超）痕量水平的检测能力不足以及基质造成干扰效应的风险，但它们允许低成本分析、便携性、低样品消耗和快速响应。近年来，用于现场检测有毒金属离子和其他污染物的纸基分析设备的发展急剧增加。随着纤维素基质的广泛可用性，提供增强识别能力的受体（例如各种纳米材料）的固定化推动了新型传感方法的设计。本综述旨在描述和讨论使用固定在纤维素基基质上进行微量元素检测的不同纳米受体（例如等离子体纳米颗粒、量子点、碳基荧光纳米颗粒等）所产生的不同可能性、它们的优点和缺点。