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Facile and efficient 3-chlorophenol sensor development based on photolumenescent core-shell CdSe/ZnS quantum dots.
Scientific Reports ( IF 3.8 ) Pub Date : 2020-01-17 , DOI: 10.1038/s41598-019-57091-6 Mohammed M Rahman 1 , Mohammad Rezaul Karim 2 , M M Alam 3 , M Badruz Zaman 4 , Nabeel Alharthi 5 , Hamad Alharbi 5 , Abdullah M Asiri 1
Scientific Reports ( IF 3.8 ) Pub Date : 2020-01-17 , DOI: 10.1038/s41598-019-57091-6 Mohammed M Rahman 1 , Mohammad Rezaul Karim 2 , M M Alam 3 , M Badruz Zaman 4 , Nabeel Alharthi 5 , Hamad Alharbi 5 , Abdullah M Asiri 1
Affiliation
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Quantum dots (QDs) are semiconducting inorganic nanoparticles, tiny molecules of 2-10 nm sizes to strength the quantum confinements of electrons. The QDs are good enough to emit light onto electrons for exciting and returning to the ground state. Here, CdSe/ZnS core/shell QDs have been prepared and applied for electrochemical sensor development in this approach. Flat glassy carbon electrode (GCE) was coated with CdSe/ZnS QDs as very thin uniform layer to result of the selective and efficient sensor of 3-CP (3-chlorophenol). The significant analytical parameters were calculated from the calibration plot such as sensitivity (3.6392 µA µM-1 cm-2) and detection limit (26.09 ± 1.30 pM) with CdSe/ZnS/GCE sensor probe by electrochemical approach. The calibration curve was fitted with the regression co-efficient r2 = 0.9906 in the range of 0.1 nM ∼ 0.1 mM concentration, which denoted as linear dynamic range (LDR). Besides these, it was performed the reproducibility in short response time and successfully validated the fabricated sensor for 3-CP in the real environmental and extracted samples. It is introduced as a noble route to detect the environmental phenolic contaminants using CdSe/ZnS QDs modified sensor by electrochemical method for the safety of healthcare and environmental fields at broad scales.
中文翻译：
基于光致发光核壳 CdSe/ZnS 量子点的简便高效的 3-氯苯酚传感器开发。
量子点 (QD) 是半导体无机纳米粒子，是 2-10 nm 大小的微小分子，可增强电子的量子限制。量子点足以向电子发射光以激发并返回基态。在这里，CdSe/ZnS 核/壳量子点已被制备并应用于电化学传感器的开发。扁平玻碳电极 (GCE) 涂有 CdSe/ZnS QD 作为非常薄的均匀层，以实现 3-CP（3-氯苯酚）的选择性和高效传感器。通过电化学方法使用 CdSe/ZnS/GCE 传感器探针从校准图中计算出重要的分析参数，例如灵敏度 (3.6392 µA µM-1 cm-2) 和检测限 (26.09 ± 1.30 pM)。校准曲线在0.1 nM ∼ 0.1 mM浓度范围内拟合回归系数r2 = 0.9906，表示为线性动态范围(LDR)。除此之外，它还进行了短响应时间内的再现性，并成功验证了在真实环境和提取样品中制造的 3-CP 传感器。它被介绍为使用 CdSe/ZnS QDs 修饰传感器通过电化学方法检测环境酚类污染物的高贵途径，以确保大范围的医疗保健和环境领域的安全。
更新日期：2020-01-17
中文翻译：
基于光致发光核壳 CdSe/ZnS 量子点的简便高效的 3-氯苯酚传感器开发。
量子点 (QD) 是半导体无机纳米粒子，是 2-10 nm 大小的微小分子，可增强电子的量子限制。量子点足以向电子发射光以激发并返回基态。在这里，CdSe/ZnS 核/壳量子点已被制备并应用于电化学传感器的开发。扁平玻碳电极 (GCE) 涂有 CdSe/ZnS QD 作为非常薄的均匀层，以实现 3-CP（3-氯苯酚）的选择性和高效传感器。通过电化学方法使用 CdSe/ZnS/GCE 传感器探针从校准图中计算出重要的分析参数，例如灵敏度 (3.6392 µA µM-1 cm-2) 和检测限 (26.09 ± 1.30 pM)。校准曲线在0.1 nM ∼ 0.1 mM浓度范围内拟合回归系数r2 = 0.9906，表示为线性动态范围(LDR)。除此之外，它还进行了短响应时间内的再现性，并成功验证了在真实环境和提取样品中制造的 3-CP 传感器。它被介绍为使用 CdSe/ZnS QDs 修饰传感器通过电化学方法检测环境酚类污染物的高贵途径，以确保大范围的医疗保健和环境领域的安全。
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