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Controlling the ligands of CdZnTe quantum dots to design a super simple ratiometric fluorescence nanosensor for silver ion detection
Analyst ( IF 3.6 ) Pub Date : 2021-08-10 , DOI: 10.1039/d1an01200b Haining Cui 1 , Chengquan Wang 2 , Suli Jia 1 , Jing Qian 1 , Qi Zhang 1 , Yunmeng Tian 1 , Nan Hao 1 , Jie Wei 1 , Lingliang Long 1 , Kun Wang 1, 3
Analyst ( IF 3.6 ) Pub Date : 2021-08-10 , DOI: 10.1039/d1an01200b Haining Cui 1 , Chengquan Wang 2 , Suli Jia 1 , Jing Qian 1 , Qi Zhang 1 , Yunmeng Tian 1 , Nan Hao 1 , Jie Wei 1 , Lingliang Long 1 , Kun Wang 1, 3
Affiliation
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A super simple ratiometric fluorescence nanosensor has been fabricated by controlling the ligands of CdZnTe quantum dots (QDs), allowing the sensitive and visual detection of silver ions (Ag+). The green-emitting L-cysteine-protected CdZnTe QDs (Lcys-CdZnTe QDs) had a specific response to Ag+ and were used as the reporting probe, while the red-emitting N-acetyl-L-cysteine-protected CdZnTe QDs (NAC-CdZnTe QDs) showed no obvious response to all tested metal ions and were selected as the reference probe. Simply mixing them without any encapsulated synthesis ultimately produced a time-saving, low-cost detection method, allowing the sensitive and visual detection of Ag+ in samples. The proposed nanosensor exhibited a linear range of 0.5–4.0 μM along with a detection limit of 0.17 μM, and has been successfully applied in real tap water and lake water samples. This nanosensor also showed obvious color changes in the detection process and has potential in visual semi-quantitative detection. Our approach may provide a general and feasible strategy for designing ratiometric fluorescence nanosensors, which will attract a wide range of interest in sensing-related fields.
中文翻译：
控制CdZnTe量子点的配体设计用于银离子检测的超简单比例荧光纳米传感器
通过控制 CdZnTe 量子点 (QD) 的配体，制造了一种超级简单的比例荧光纳米传感器，可以对银离子 (Ag + )进行灵敏和视觉检测。发绿光的L -半胱氨酸保护的 CdZnTe QDs (Lcys-CdZnTe QDs) 对 Ag +具有特异性响应并被用作报告探针，而发红光的N -乙酰基-L -半胱氨酸保护的 CdZnTe QDs (NAC -CdZnTe QDs) 对所有测试的金属离子没有明显的响应，并被选为参考探针。在没有任何封装合成的情况下简单地混合它们最终产生了一种省时、低成本的检测方法，允许灵敏和视觉检测 Ag +在样品中。所提出的纳米传感器的线性范围为 0.5-4.0 μM，检测限为 0.17 μM，并已成功应用于实际自来水和湖水样品。这种纳米传感器在检测过程中也表现出明显的颜色变化，在视觉半定量检测方面具有潜力。我们的方法可能为设计比例荧光纳米传感器提供通用且可行的策略，这将吸引传感相关领域的广泛兴趣。
更新日期：2021-08-25
中文翻译：
控制CdZnTe量子点的配体设计用于银离子检测的超简单比例荧光纳米传感器
通过控制 CdZnTe 量子点 (QD) 的配体，制造了一种超级简单的比例荧光纳米传感器，可以对银离子 (Ag + )进行灵敏和视觉检测。发绿光的L -半胱氨酸保护的 CdZnTe QDs (Lcys-CdZnTe QDs) 对 Ag +具有特异性响应并被用作报告探针，而发红光的N -乙酰基-L -半胱氨酸保护的 CdZnTe QDs (NAC -CdZnTe QDs) 对所有测试的金属离子没有明显的响应，并被选为参考探针。在没有任何封装合成的情况下简单地混合它们最终产生了一种省时、低成本的检测方法，允许灵敏和视觉检测 Ag +在样品中。所提出的纳米传感器的线性范围为 0.5-4.0 μM，检测限为 0.17 μM，并已成功应用于实际自来水和湖水样品。这种纳米传感器在检测过程中也表现出明显的颜色变化，在视觉半定量检测方面具有潜力。我们的方法可能为设计比例荧光纳米传感器提供通用且可行的策略，这将吸引传感相关领域的广泛兴趣。
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