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CdTe/ZnS quantum dots as fluorescent probes for ammonium determination
Author(s) -
Yi KuiYu
Publication year - 2016
Publication title -
luminescence
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 45
eISSN - 1522-7243
pISSN - 1522-7235
DOI - 10.1002/bio.3057
Subject(s) - fluorescence , quantum dot , cadmium telluride photovoltaics , nanotechnology , optoelectronics , ammonium , materials science , chemistry , physics , optics , organic chemistry
Novel CdTe/ZnS quantum dot (QD) probes based on the quenching effect were proposed for the simple, rapid, and specific determination of ammonium in aqueous solutions. The QDs were modified using 3‐mercaptopropionic acid, and the fluorescence responses of the CdTe/ZnS QD probes to ammonium were detected through regularity quenching. The quenching levels of the CdTe/ZnS QDs and ammonium concentration showed a good linear relationship between 4.0 × 10 −6 and 5.0 × 10 −4 mol/L; the detection limit was 3.0 × 10 −7 mol/L. Ammonium contents in synthetic explosion soil samples were measured to determine the practical applications of the QD probes and a probable quenching mechanism was described. Copyright © 2015 John Wiley & Sons, Ltd.