A Mn:ZnSe quantum dot-based turn-on fluorescent sensor for the highly selective and sensitive detection of Cd2+,Analytical Methods

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A Mn:ZnSe quantum dot-based turn-on fluorescent sensor for the highly selective and sensitive detection of Cd2+
Analytical Methods ( IF 2.7 ) Pub Date : 2019/12/23 , DOI: 10.1039/c9ay02445j
Zhi-Qiang Zhou _{1,

2,

3,

4,

5} , Li-Yun Yang _{1,

2,

3,

4} , Yuan-Ping Liao _{1,

2,

3,

4} , Hui-Yan Wu _{1,

2,

3,

4} , Xiao-Hui Zhou _{1,

2,

3,

4} , Shan Huang _{1,

2,

3,

4} , Yi Liu _{1,

2,

3,

4,

5} , Qi Xiao _{1,

2,

3,

4}

Affiliation

A highly selective and sensitive nanoprobe with fluorescence turn-on sensing properties for recognizing Cd²⁺ was developed through replacing Mn²⁺ near the surface of Mn:ZnSe quantum dots (QDs). The similar ionic radii of Cd²⁺ and Zn²⁺ make the replacement of superficial Zn²⁺ by Cd²⁺ possible, followed by the replacement of external Mn²⁺ by Cd²⁺. Thus, this fluorescence turn-on strategy possesses great selectivity for the determination of Cd²⁺. Based on this strategy, the limit of detection (LOD) for Cd²⁺ is 18 nM, which is superior to the LOD of most reported fluorescent nanomaterial-based probes.

中文翻译：

基于Mn：ZnSe量子点的开启荧光传感器，用于Cd2 +的高选择性和灵敏检测

通过替代Mn：ZnSe量子点（QDs）表面附近的Mn ²⁺，开发了一种具有荧光开启感应特性的高选择性和灵敏纳米探针，用于识别Cd ²⁺。镉的类似离子半径²⁺和Zn ²⁺，更换的肤浅的Zn ²⁺镉²⁺可能，随后更换外部的Mn ²⁺镉²⁺。因此，这种荧光开启策略对Cd ²⁺的测定具有很大的选择性。基于此策略，Cd ^2+的检出限（LOD）为18 nM，优于大多数报道的基于荧光纳米材料的探针的LOD。

更新日期：2020-02-13

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