Fast preparation of ultrafine monolayered transition-metal dichalcogenide quantum dots using electrochemical shock for explosive detection

A simple, general and fast method called "electrochemical shock" is developed to prepare monolayered transition-metal dichalcogenide (TMD) QDs with an average size of 2-4 nm and an average thickness of 0.85 ± 0.5 nm with only about 10 min of ultrasonication. Just like nails hammered into a...

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Published inChemical communications (Cambridge, England) Vol. 52; no. 76; pp. 11442 - 11445
Main Authors Chen, Zhigang, Tao, Zhengxu, Cong, Shan, Hou, Junyu, Zhang, Dengsong, Geng, Fengxia, Zhao, Zhigang
Format Journal Article
LanguageEnglish
Published England 01.01.2016
Subjects
Crystals
Disintegration
Explosives detection
Extraction
Nails
Oleic acid
Quantum dots
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Summary:A simple, general and fast method called "electrochemical shock" is developed to prepare monolayered transition-metal dichalcogenide (TMD) QDs with an average size of 2-4 nm and an average thickness of 0.85 ± 0.5 nm with only about 10 min of ultrasonication. Just like nails hammered into a plate, the electrochemical shock with Al ions and the following extraction with the help of oleic acid can disintegrate bulk TMD crystals into ultrafine TMD QDs. The fast-prepared QDs are then applied to detect highly explosive molecules such as 2,4,6-trinitrophenol (TNP) with a low detection limit of 10 M. Our versatile method could be broadly applicable for the fast production of ultrathin QDs of other materials with great promise for various applications.
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ISSN:1359-7345
1364-548X
DOI:10.1039/c6cc06325j