A Smartphone-Based Sensing System for On-Site Quantitation of Multiple Heavy Metal Ions Using Fluorescent Carbon Nanodots-Based Microarrays.,ACS Sensors

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A Smartphone-Based Sensing System for On-Site Quantitation of Multiple Heavy Metal Ions Using Fluorescent Carbon Nanodots-Based Microarrays.
ACS Sensors ( IF 8.2 ) Pub Date : 2020-03-16 , DOI: 10.1021/acssensors.0c00219
Meng Xiao ₁ , Zhonggang Liu ₁ , Ningxia Xu ₁ , Lelun Jiang _{1,

2} , Mengsu Yang ₃ , Changqing Yi _{1,

2}

Affiliation

The development of cost-effective and versatile sensing system for simultaneous and rapid quantitation of multiple targets is highly demanded for environmental surveillance, food safety inspection, home healthcare, etc. This work reports on (1) paper-based microarrays relying on fluorescence turn-off of carbon nanodots (CDs) for analyte recognition and (2) a stand-alone smartphone-based portable reader (SBR) installed with a custom-designed APP (SBR-App), which can accurately and reproducibly acquire fluorescence change from the microarray chip, automatically report the results, generate and share the reports via wireless network. Simultaneous detection of Hg2+, Pb2+, and Cu2+ in the Pearl River water samples was achieved with the reported sensing system. End-user operation is limited to pipet samples to the microarray chip, insert the chip to the SBR, and open the SBR-App to acquire an image 5 min after sample introduction. There is no requirement for complicated sample pre-treatment and expensive equipment except for a smartphone. This versatile and cost-effective smartphone-based sensing system featured with reliability and simplicity is ideally suited for user- and eco-friendly point-of-need detection in resource-constrained environments.

中文翻译：

基于智能手机的传感系统，用于基于荧光碳纳米点的微阵列现场定量多种重金属离子。

对于环境监测，食品安全检查，家庭医疗保健等，迫切需要开发一种经济高效的多功能传感系统，用于同时快速定量多个目标。这项工作报告（1）依赖于荧光转换的纸基微阵列不含碳纳米点（CD）来进行分析物识别；（2）安装有定制设计的APP（SBR-App）的基于智能手机的独立便携式阅读器（SBR），该应用可以准确，可重复地从微阵列获取荧光变化芯片，自动报告结果，通过无线网络生成并共享报告。使用报告的传感系统可以同时检测珠江水样中的Hg2 +，Pb2 +和Cu2 +。最终用户的操作仅限于将样品吸移到微阵列芯片上，将芯片插入SBR，并在样品引入后5分钟打开SBR-App以获取图像。除了智能手机外，不需要复杂的样品预处理和昂贵的设备。这种基于智能手机的多功能，经济高效的传感系统具有可靠性和简单性，非常适合在资源受限的环境中进行用户和环境友好的需求点检测。

更新日期：2020-04-23

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