Efficient fluorescence energy transfer system between fluorescein isothiocyanate and CdTe quantum dots for the detection of silver ions.
We report a fluorescence resonance energy transfer (FRET) system in which the fluorescent donor is fluorescein isothiocyanate (FITC) dye and the fluorescent acceptor is CdTe quantum dot (QDs). Based on FRET quenching theory, we designed a method to detect the concentration of silver ions (Ag(+)). The results revealed a good linear trend over Ag(+) concentrations in the range 0.01-8.96 nmol/L, a range that was larger than with other methods; the quenching coefficient is 0.442. The FRET mechanism and physical mechanisms responsible for dynamic quenching are also discussed.
School of Science, Changchun University of Science and Technology, Changchun, People's Republic of China.
Yueshu
Y
Feng
School of Science, Changchun University of Science and Technology, Changchun, People's Republic of China.
Liwei
L
Liu
School of Science, Changchun University of Science and Technology, Changchun, People's Republic of China.
Siyi
S
Hu
School of Science, Changchun University of Science and Technology, Changchun, People's Republic of China.
Peng
P
Zou
School of Science, Changchun University of Science and Technology, Changchun, People's Republic of China.
Jiaqi
J
Zhang
School of Science, Changchun University of Science and Technology, Changchun, People's Republic of China.
Chen
C
Huang
School of Science, Changchun University of Science and Technology, Changchun, People's Republic of China.
Yue
Y
Wang
School of Science, Changchun University of Science and Technology, Changchun, People's Republic of China.
Sihan
S
Wang
Xihe
X
Zhang
D019187:Cadmium Compounds / Q000737:chemistry*; D031541:Fluorescence Resonance Energy Transfer; D005456:Fluorescent Dyes / Q000737:chemistry*; D007477:Ions / Q000032:analysis; D017879:Isothiocyanates / Q000737:chemistry*; D045663:Quantum Dots; D012834:Silver / Q000032:analysis*; D013691:Tellurium / Q000737:chemistry*
D019187:Cadmium Compounds; D005456:Fluorescent Dyes; D007477:Ions; D017879:Isothiocyanates; D012834:Silver; D013691:Tellurium; C028337:cadmium telluride
energy-transfer efficiency; fluorescence resonance energy transfer; fluorescence spectrum; quantum dots; quenching method