title: Fast preparation of ultrafine monolayered transition-metal dichalcogenide quantum dots using electrochemical shock for explosive detection.
abstract: 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 Al3+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 10-6M. Our versatile method could be broadly applicable for the fast production of ultrathin QDs of other materials with great promise for various applications.
authors.affiliation: Department of Chemistry, College of Science, Shanghai University, Shanghai 200444, China. dszhang@shu.edu.cn and Key Lab of Nanodevices and Applications, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences (CAS), Suzhou 215123, China. zgzhao2011@sinano.ac.cn.
authors.forename: Zhigang
authors.initials: Z
authors.lastname: Chen
authors.affiliation: Key Lab of Nanodevices and Applications, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences (CAS), Suzhou 215123, China. zgzhao2011@sinano.ac.cn.
authors.forename: Zhengxu
authors.initials: Z
authors.lastname: Tao
authors.affiliation: Key Lab of Nanodevices and Applications, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences (CAS), Suzhou 215123, China. zgzhao2011@sinano.ac.cn.
authors.forename: Shan
authors.initials: S
authors.lastname: Cong
authors.affiliation: College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.
authors.forename: Junyu
authors.initials: J
authors.lastname: Hou
authors.affiliation: Department of Chemistry, College of Science, Shanghai University, Shanghai 200444, China. dszhang@shu.edu.cn.
authors.forename: Dengsong
authors.initials: D
authors.lastname: Zhang
authors.affiliation: College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China.
authors.forename: Fengxia
authors.initials: F
authors.lastname: Geng
authors.affiliation: Key Lab of Nanodevices and Applications, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences (CAS), Suzhou 215123, China. zgzhao2011@sinano.ac.cn.
authors.forename: Zhigang
authors.initials: Z
authors.lastname: Zhao