Sensitive iodate sensor based on fluorescence quenching of gold nanocluster.
In this report we described a highly selective and sensitive iodate sensor. Due to its interaction with fluorescent gold nanoclusters, iodate was capable of oxidizing and etching gold core of the nanoclusters, resulting in fluorescence quenching. Furthermore, it was found that extra iodide ion could enhance this etching process, and even a small amount of iodate could lead to significant quenching. Under an optimized condition, linear relationship between the iodate concentration and the fluorescence quenching was obtained in the range 10 nM-1 μM. The developed iodate sensor was found selective and capable of detecting iodate as low as 2.8 nM. The sensor was then applied for the analysis of iodate in real sample and satisfactory recoveries were obtained.
The Key Lab of Health Chemistry and Molecular Diagnosis of Suzhou, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Ren'ai Road, Industrial Park, Suzhou 215123, China.
Ruiping
R
Li
The Key Lab of Health Chemistry and Molecular Diagnosis of Suzhou, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Ren'ai Road, Industrial Park, Suzhou 215123, China.
Pingping
P
Xu
The Key Lab of Health Chemistry and Molecular Diagnosis of Suzhou, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Ren'ai Road, Industrial Park, Suzhou 215123, China.
Jun
J
Fan
The Key Lab of Health Chemistry and Molecular Diagnosis of Suzhou, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Ren'ai Road, Industrial Park, Suzhou 215123, China.
Junwei
J
Di
The Key Lab of Health Chemistry and Molecular Diagnosis of Suzhou, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Ren'ai Road, Industrial Park, Suzhou 215123, China.
Yifeng
Y
Tu
The Key Lab of Health Chemistry and Molecular Diagnosis of Suzhou, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Ren'ai Road, Industrial Park, Suzhou 215123, China. Electronic address: yanjl@suda.edu.cn.
Jilin
J
Yan
D000818:Animals; D015374:Biosensing Techniques / Q000379:methods*; D002417:Cattle; D005456:Fluorescent Dyes / Q000737:chemistry*; D006046:Gold / Q000737:chemistry*; D007452:Iodates / Q000032:analysis* / Q000737:chemistry; D053768:Metal Nanoparticles / Q000737:chemistry*; D013050:Spectrometry, Fluorescence
D005456:Fluorescent Dyes; D007452:Iodates; D006046:Gold
Etching; Fluorescence quenching; Gold nanocluster; Iodate; Iodide