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Methionine-Capped Gold Nanoclusters as a Fluorescence-Enhanced Probe for Cadmium(II) Sensing
Peng, Y (Peng, Yan); Wang, MM (Wang, Maomao); Wu, XX (Wu, Xiaoxia); Wang, F (Wang, Fu); Liu, L (Liu, Lang)
2018
Source PublicationSENSORS
ISSN1424-8220
Volume18Issue:2Pages:1-11
Abstract

Gold nanoclusters (Au NCs) have been considered as novel heavy metal ions sensors due to their ultrafine size, photo-stability and excellent fluorescent properties. In this study, a green and facile method was developed for the preparation of fluorescent water-soluble gold nanoclusters with methionine as a stabilizer. The nanoclusters emit orange fluorescence with excitation/emission peaks at 420/565 nm and a quantum yield of about 1.46%. The fluorescence of the Au NCs is selectively and sensitively enhanced by addition of Cd(II) ions attributed to the Cd(II) ion-induced aggregation of nanoclusters. This finding was further used to design a fluorometric method for the determination of Cd(II) ions, which had a linear response in the concentration range from 50 nM to 35 mu M and a detection limit of 12.25 nM. The practicality of the nanoprobe was validated in various environmental water samples and milk powder samples, with a fairly satisfactory recovery percent.

KeywordMethionine Gold Nanoclusters Fluorescence Enhancing Cadmium Ion Water Milk
DOI10.3390/s18020658
Indexed BySCI
WOS IDWOS:000427544000341
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.xjipc.cas.cn/handle/365002/5291
Collection环境科学与技术研究室
Corresponding AuthorWang, F (Wang, Fu)
Affiliation1.Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Lab Environm Sci & Technol, Urumqi 830011, Xinjiang, Peoples R China
2.Xinjiang Univ, Coll Chem & Chem Engn, Urumqi 830011, Xinjiang, Peoples R China
Recommended Citation
GB/T 7714
Peng, Y ,Wang, MM ,Wu, XX ,et al. Methionine-Capped Gold Nanoclusters as a Fluorescence-Enhanced Probe for Cadmium(II) Sensing[J]. SENSORS,2018,18(2):1-11.
APA Peng, Y ,Wang, MM ,Wu, XX ,Wang, F ,&Liu, L .(2018).Methionine-Capped Gold Nanoclusters as a Fluorescence-Enhanced Probe for Cadmium(II) Sensing.SENSORS,18(2),1-11.
MLA Peng, Y ,et al."Methionine-Capped Gold Nanoclusters as a Fluorescence-Enhanced Probe for Cadmium(II) Sensing".SENSORS 18.2(2018):1-11.
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