Black Phosphorus Quantum Dots1. (3rd February 2015)

• Record Type: Journal Article
• Authors: 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
• Is Part Of: Angewandte Chemie. Volume 127:Number 12(2015)
• Page Start: 3724
• Page End: 3728
• Publication Date: 2015-02-03
• Subjects: Quantenpunkte -- Schwarzer Phosphor -- Speichereinheiten -- Zweidimensionale Materialien; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201409400
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: 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.