Black Phosphorus Quantum Dots

作者：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^*

来源：Angewandte Chemie - International Edition, 2015, 54(12): 3653-3657.

DOI：10.1002/anie.201409400

• black phosphorus
• memory devices
• quantum dots
• two-dimensional materials

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.

• 出版日期2015-3-16
• 单位东北师范大学; 南京邮电大学