CTAB-capped Mn-doped ZnS quantum dots and label-free aptamer for room-temperature phosphorescence detection of mercury ions.
A new room-temperature phosphorescence (RTP) mercury ions sensor has been developed based on cetyltrimethylammonium bromide-capped Mn-doped ZnS quantum dots (CTAB/Mn-ZnS QDs) and label-free thymine (T)-rich aptamer. The formed T-Hg(2+)-T dsDNA can linearly quench the RTP of Mn-ZnS QDs through electron transfer and aggregation effect, and give a detection limit of 1.5 nM.
Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education, School of Chemistry, Southwest University, Chongqing, PR China.
Wan Yi
WY
Xie
Wei Tao
WT
Huang
Hong Qun
HQ
Luo
Nian Bing
NB
Li
D052157:Aptamers, Nucleotide / Q000737:chemistry*; D000077286:Cetrimonium; D002593:Cetrimonium Compounds / Q000737:chemistry; D004247:DNA / Q000737:chemistry; D007477:Ions / Q000737:chemistry; D008345:Manganese / Q000737:chemistry; D008628:Mercury / Q000032:analysis*; D045663:Quantum Dots; D013056:Spectrophotometry, Ultraviolet; D013440:Sulfides / Q000737:chemistry; D013696:Temperature; D013941:Thymine / Q000737:chemistry; D017967:Zinc Compounds / Q000737:chemistry
D052157:Aptamers, Nucleotide; D002593:Cetrimonium Compounds; D007477:Ions; D013440:Sulfides; D017967:Zinc Compounds; D008345:Manganese; D004247:DNA; D008628:Mercury; C031238:zinc sulfide; D013941:Thymine; D000077286:Cetrimonium