TY - JOUR
T1 - Highly sensitive and selective fluorescence probe for Cr3+ ion detection using water-soluble CdSe QDs
AU - Sung, Ti Wen
AU - Lo, Yu Lung
AU - Chang, I. Ling
N1 - Funding Information:
The partial funding of this study by the National Science Council of Taiwan under Grant No. NSC 101-2221-E-006-028-MY3 is gratefully acknowledged. In addition, the additional financial support provided to this study by the Ministry of Education , Taiwan, R.O.C. under the Aim for the University Project to the National Cheng Kung University (NCKU) initiative is also gratefully acknowledged.
PY - 2014/10/31
Y1 - 2014/10/31
N2 - A high-performance sensor for Cr3+ ion detection is proposed based on water-soluble CdSe QDs immobilized on the tip of an optical fiber in a sol-gel matrix. The CdSe QDs have many favorable properties, including good water solubility, low cytotoxicity, high quantum yield, and good resistance to photobleaching in aqueous solutions. The experimental results show that the fluorescence intensity of the CdSe QDs exhibits a strong quenching effect following interaction with Cr3+ ions. A linear relationship (R 2 = 0.9964) is observed between the relative fluorescence intensity (I0/I) and the Cr3+ ion concentration for concentrations in the range of 0.1-20 μM. In addition, the water-soluble CdSe QDs are found to be more sensitive to Cr3+ ions than to other metal ions such as Cu2+, Ce3+, Al3+, La3+, Co 2+, Ba2+, Ni2+ and Ag+. In general, the results presented in this study show that the proposed sensor has significant potential for Cr3+ sensing in many environmental and biomedical applications.
AB - A high-performance sensor for Cr3+ ion detection is proposed based on water-soluble CdSe QDs immobilized on the tip of an optical fiber in a sol-gel matrix. The CdSe QDs have many favorable properties, including good water solubility, low cytotoxicity, high quantum yield, and good resistance to photobleaching in aqueous solutions. The experimental results show that the fluorescence intensity of the CdSe QDs exhibits a strong quenching effect following interaction with Cr3+ ions. A linear relationship (R 2 = 0.9964) is observed between the relative fluorescence intensity (I0/I) and the Cr3+ ion concentration for concentrations in the range of 0.1-20 μM. In addition, the water-soluble CdSe QDs are found to be more sensitive to Cr3+ ions than to other metal ions such as Cu2+, Ce3+, Al3+, La3+, Co 2+, Ba2+, Ni2+ and Ag+. In general, the results presented in this study show that the proposed sensor has significant potential for Cr3+ sensing in many environmental and biomedical applications.
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U2 - 10.1016/j.snb.2014.05.101
DO - 10.1016/j.snb.2014.05.101
M3 - Article
AN - SCOPUS:84905125446
SN - 0925-4005
VL - 202
SP - 1349
EP - 1356
JO - Sensors and Actuators B: Chemical
JF - Sensors and Actuators B: Chemical
ER -