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Black Phosphorus Quantum Dots
Author(s) -
Zhang Xiao,
Xie Haiming,
Liu Zhengdong,
Tan Chaoliang,
Luo Zhimin,
Li Hai,
Lin Jiadan,
Sun Liqun,
Chen Wei,
Xu Zhichuan,
Xie Linghai,
Huang Wei,
Zhang Hua
Publication year - 2015
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201409400
Subject(s) - black phosphorus , exfoliation joint , materials science , quantum dot , nanomaterials , polyvinylpyrrolidone , nanotechnology , nanostructure , layer (electronics) , optoelectronics , phosphorus , graphene , nanocrystal , polymer chemistry , metallurgy
As a unique two‐dimensional nanomaterial, layered black phosphorus (BP) nanosheets have shown promising applications in electronics. Although mechanical exfoliation was successfully used to prepare BP nanosheets, it is still a challenge to produce novel BP nanostructures in high yield. A facile top‐down approach for preparation of black phosphorus quantum dots (BPQDs) in solution is presented. The obtained BPQDs have a lateral size of 4.9±1.6 nm and thickness of 1.9±0.9 nm (ca. 4±2 layers). As a proof‐of‐concept application, by using BPQDs mixed with polyvinylpyrrolidone as the active layer, a flexible memory device was successfully fabricated that exhibits a nonvolatile rewritable memory effect with a high ON/OFF current ratio and good stability.