Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 54, Issue 12, Pages 3653-3657Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201409400
Keywords
black phosphorus; memory devices; quantum dots; two-dimensional materials
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Funding
- MOE in Singapore [ARC 26/13, MOE2013-T2-1-034, RG 61/12, RGT18/13, RG5/13, M4080865.070.706022]
- National Research Foundation, Prime Minister's Office, Singapore
- National Natural Science Foundation of China [21443001]
- National Natural Science Funds for Excellent Young Scholar of China [21322402]
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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.
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