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Fluorescence Sensor Based on Biosynthetic CdSe/CdS Quantum Dots and Liposome Carrier Signal Amplification for Mercury Detection.
Zhang, Yi; Xiao, Jing-Yu; Zhu, Yuan; Tian, Li-Jiao; Wang, Wei-Kang; Zhu, Ting-Ting; Li, Wen-Wei; Yu, Han-Qing.
Afiliación
  • Zhang Y; CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science and Technology of China, Hefei, 230026, China.
  • Xiao JY; College of Environmental Science and Engineering, Hunan University, Changsha 410082, China.
  • Zhu Y; CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science and Technology of China, Hefei, 230026, China.
  • Tian LJ; College of Environmental Science and Engineering, Hunan University, Changsha 410082, China.
  • Wang WK; CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science and Technology of China, Hefei, 230026, China.
  • Zhu TT; CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science and Technology of China, Hefei, 230026, China.
  • Li WW; CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science and Technology of China, Hefei, 230026, China.
  • Yu HQ; CAS Key Laboratory of Urban Pollutant Conversion, Department of Applied Chemistry, University of Science and Technology of China, Hefei, 230026, China.
Anal Chem ; 92(5): 3990-3997, 2020 03 03.
Article en En | MEDLINE | ID: mdl-32020800
Mercury (Hg), as a highly harmful environmental pollutant, poses severe ecological and health risks even at low concentrations. Accurate and sensitive methods for detecting Hg2+ ions in aquatic environments are highly needed. In this work, we developed a highly sensitive fluorescence sensor for Hg2+ detection with an integrated use of biosynthetic CdSe/CdS quantum dots (QDs) and liposome carrier signal amplification. To construct such a sensor, three single-stranded DNA probes were rationally designed based on the thymine-Hg2+-thymine (T-Hg2+-T) coordination chemical principles and by taking advantage of the biocompatibility and facile-modification properties of the biosynthetic QDs. Hg2+ could be determined in a range from 0.25 to 100 nM with a detection limit of 0.01 nM, which met the requirements of environmental sample detection. The sensor also exhibited a high selectivity for Hg2+ detection in the presence of other high-level metal ions. A satisfactory capacity of the sensor for detecting environmental samples including tap water, river water, and landfill leachate was also demonstrated. This work opens up a new application scenario for biosynthetic QDs and holds a great potential for environmental monitoring applications.
Asunto(s)

Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Asunto principal: Espectrometría de Fluorescencia / Puntos Cuánticos / Liposomas / Mercurio Tipo de estudio: Diagnostic_studies Idioma: En Revista: Anal Chem Año: 2020 Tipo del documento: Article País de afiliación: China

Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Asunto principal: Espectrometría de Fluorescencia / Puntos Cuánticos / Liposomas / Mercurio Tipo de estudio: Diagnostic_studies Idioma: En Revista: Anal Chem Año: 2020 Tipo del documento: Article País de afiliación: China