Turn-on electrochemiluminescence sensing of Cd2+ based on CdTe quantum dots
| Autor: | Honglei Song, Haiyan Wang, Miao Yang, Xinxin Fan |
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| Rok vydání: | 2014 |
| Předmět: |
Detection limit
Cadmium ion Chemistry Analytical chemistry Water Electrochemical Techniques Atomic and Molecular Physics and Optics Cadmium telluride photovoltaics Analytical Chemistry chemistry.chemical_compound Limit of Detection Quantum dot Luminescent Measurements Quantum Dots Turn (geometry) Cadmium Compounds Electrochemiluminescence Thioglycolic acid Tellurium Instrumentation Spectroscopy Cadmium |
| Zdroj: | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy. 133:130-133 |
| ISSN: | 1386-1425 |
| DOI: | 10.1016/j.saa.2014.05.053 |
| Popis: | A simple and sensitive method for the detection of cadmium ion was proposed based on the electrochemiluminescence (ECL) of thioglycolic acid capped-CdTe quantum dots (CdTe QDs). The ECL of CdTe QDs was firstly quenched by introduction of S2− and was restored due to following addition of Cd2+, on the basis of which, a “turn-on” ECL method for the detection of Cd2+ was demonstrated. The ECL of CdTe QDs exhibited linear response toward Cd2+ concentration in the range from 6.3 nM to 3.4 μM (R = 0.999) with a detection limit of 2.1 nM. The proposed assay was simple, sensitive, selective, and practicable in real water samples. |
| Databáze: | OpenAIRE |
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