中国物理B ›› 2017, Vol. 26 ›› Issue (6): 66102-066102.doi: 10.1088/1674-1056/26/6/066102

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

Label-free tungsten disulfide quantum dots as a fluorescent sensing platform for highly efficient detection of copper (II) ions

Xuan Zhao(赵宣), Da-Wei He(何大伟), Yong-Sheng Wang(王永生), Yin Hu(胡音), Chen Fu(付晨), Xue Li(李雪)   

  1. Key Laboratory of Luminescence and Optical Information, Beijing Jiaotong University, Beijing 100044, China
  • 收稿日期:2017-01-12 修回日期:2017-02-23 出版日期:2017-06-05 发布日期:2017-06-05
  • 通讯作者: Da-Wei He, Yong-Sheng Wang E-mail:dwhe@bjtu.edu.cn;yshwang@bjtu.edu.cn
  • 基金资助:

    Project supported by the National Basic Research Program, China (Grant Nos. 2016YFA0202300 and 2016YFA0202302), the National Natural Science Foundation of China (Grant Nos. 61527817, 61335006, and 61378073), and the Beijing Municipal Science and Technology Committee, China (Grant No. Z151100003315006).

Label-free tungsten disulfide quantum dots as a fluorescent sensing platform for highly efficient detection of copper (II) ions

Xuan Zhao(赵宣), Da-Wei He(何大伟), Yong-Sheng Wang(王永生), Yin Hu(胡音), Chen Fu(付晨), Xue Li(李雪)   

  1. Key Laboratory of Luminescence and Optical Information, Beijing Jiaotong University, Beijing 100044, China
  • Received:2017-01-12 Revised:2017-02-23 Online:2017-06-05 Published:2017-06-05
  • Contact: Da-Wei He, Yong-Sheng Wang E-mail:dwhe@bjtu.edu.cn;yshwang@bjtu.edu.cn
  • Supported by:

    Project supported by the National Basic Research Program, China (Grant Nos. 2016YFA0202300 and 2016YFA0202302), the National Natural Science Foundation of China (Grant Nos. 61527817, 61335006, and 61378073), and the Beijing Municipal Science and Technology Committee, China (Grant No. Z151100003315006).

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摘要：

A fluorescent probe for the sensitive and selective determination of copper ion (Cu2+) is presented. It is based on the use of tungsten disulfide quantum dots (WS2 QDs) which is independent of the pH of solution and emits strong blue fluorescence. Copper ions could cause aggregation of the WS2 QDs and lead to fluorescence quenching of WS2 QDs. The change of fluorescence intensity is proportional to the concentration of Cu2+, and the limit of detection is 0.4 μM. The fluorescent probe is highly selective for Cu2+ over some potentially interfering ions. These results indicate that WS2 QDs, as a fluorescent sensing platform, can meet the selective requirements for biomedical and environmental application.

关键词: WS2 quantum dots, photoluminescence, biosensor

Abstract:

A fluorescent probe for the sensitive and selective determination of copper ion (Cu2+) is presented. It is based on the use of tungsten disulfide quantum dots (WS2 QDs) which is independent of the pH of solution and emits strong blue fluorescence. Copper ions could cause aggregation of the WS2 QDs and lead to fluorescence quenching of WS2 QDs. The change of fluorescence intensity is proportional to the concentration of Cu2+, and the limit of detection is 0.4 μM. The fluorescent probe is highly selective for Cu2+ over some potentially interfering ions. These results indicate that WS2 QDs, as a fluorescent sensing platform, can meet the selective requirements for biomedical and environmental application.

Key words: WS2 quantum dots, photoluminescence, biosensor

中图分类号:  (Structure of nanocrystals and nanoparticles ("colloidal" quantum dots but not gate-isolated embedded quantum dots))

  • 61.46.Df
78.55.-m (Photoluminescence, properties and materials) 87.85.fk (Biosensors)