利用便携式设备通过双模式纳米传感器对西维因农药进行超灵敏现场检测,ACS Sustainable Chemistry & Engineering

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利用便携式设备通过双模式纳米传感器对西维因农药进行超灵敏现场检测
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2023-02-10 , DOI: 10.1021/acssuschemeng.2c06499
Zhong Zhang _{1,

2} , Qianru Zhang _{2,

3} , Lingfei Li ₂ , Dan Lin _{2,

4} , Changlong Jiang _{2,

4}

Affiliation

由于西维因残留对环境和人类健康的不利影响，因此西维因残留的高效检测技术具有重要意义。为了实现准确的原位分析，我们设计了一种集成了智能手机传感平台的便携式设备，用于通过比色和荧光信号快速、直观地定量测定西维因。氨基修饰的金纳米粒子 (AuNP)、发蓝光的硅量子点 (Si QD) 和发红光的碲化镉量子点 (CdTe QD) 被用作光传感中心。西维因通过静电效应触发合成后的 AuNPs 的团聚，导致 UV-vis 吸收的特定变化。Si QDs 的蓝色荧光恢复，而 CdTe QDs 的红色荧光淬灭，使荧光颜色从红色变为蓝色以进行视觉监测。比例荧光信号可用于 6 至 200 μM 范围内的定量分析，荧光检测的限值为 16.3 nM，比色灵敏度检测的限值为 49.6 nM。结合广泛使用的三维打印和应用软件，我们构建了智能手机平台，输出捕获的荧光图像的红色和蓝色通道值的比例，以满足实际样品现场分析的需要。这项工作极大地改进了氨基甲酸酯农药残留的比率传感，并拓宽了便携式定量传感装置在化学传感应用中的应用。结合广泛使用的三维打印和应用软件，我们构建了智能手机平台，输出捕获的荧光图像的红色和蓝色通道值的比例，以满足实际样品现场分析的需要。这项工作极大地改进了氨基甲酸酯农药残留的比率传感，并拓宽了便携式定量传感装置在化学传感应用中的应用。结合广泛使用的三维打印和应用软件，我们构建了智能手机平台，输出捕获的荧光图像的红色和蓝色通道值的比例，以满足实际样品现场分析的需要。这项工作极大地改进了氨基甲酸酯农药残留的比率传感，并拓宽了便携式定量传感装置在化学传感应用中的应用。

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Ultrasensitive and On-Site Detection of Carbaryl Pesticides via Dual-Mode Nanosensors Utilizing Portable Devices

High-efficiency detection technologies of carbaryl residues are significant due to their adverse effects on the environment and human health. To achieve accurate in situ analysis, we designed a portable device integrated with a smartphone sensing platform for rapid, visual quantitative determination of carbaryl via colorimetric and fluorescent signals. Amino-modified gold nanoparticles (AuNPs), blue-emitting silicon quantum dots (Si QDs), and red-emitting cadmium telluride quantum dots (CdTe QDs) were used as opto-sensing centers. The carbaryl triggered the agglomeration of the as-synthesized AuNPs by an electrostatic effect, resulting in a specific change in UV–vis absorption. The blue fluorescence of Si QDs recovered, while the red fluorescence of CdTe QDs quenched, enabling fluorescence color variation from red to blue for visual monitoring. The ratiometric fluorescent signals are available for quantitative analysis in the range of 6 to 200 μM, with a limit of 16.3 nM for fluorescence detection and 49.6 nM for colorimetric sensitivity detection. Coupling widely used three-dimensional print and application software, we constructed the smartphone platform to output the ratio of red and blue channel values of captured fluorescence images to meet the needs of on-site analysis in real samples. This work imposed great improvement in ratiometric sensing for carbamate pesticide residues and broadened the portable quantitative sensing device in chemical sensing applications.

更新日期：2023-02-10

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