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Black phosphorus quantum dots.

Xiao Zhang1, Haiming Xie, Zhengdong Liu

  • 1Energy Research Institute @ NTU (ERI@N), Interdisciplinary Graduate School, Nanyang Technological University, 50 Nanyang Drive, Singapore 637553 (Singapore); School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798 (Singapore) http://www.ntu.edu.sg/home/hzhang/

Angewandte Chemie (International Ed. in English)
|February 5, 2015
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Summary
This summary is machine-generated.

Researchers developed a simple method to create black phosphorus quantum dots (BPQDs) for flexible electronics. These novel BPQDs enable high-performance, nonvolatile memory devices with excellent stability and rewritability.

Keywords:
black phosphorusmemory devicesquantum dotstwo-dimensional materials

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Condensed Matter Physics

Background:

  • Layered black phosphorus (BP) nanosheets are 2D nanomaterials with significant potential in electronic applications.
  • Producing novel black phosphorus nanostructures, such as quantum dots, in high yields remains a challenge.

Purpose of the Study:

  • To present a facile top-down approach for the preparation of black phosphorus quantum dots (BPQDs) in solution.
  • To demonstrate the application of BPQDs in fabricating a flexible memory device.

Main Methods:

  • A top-down solution-based method was employed to synthesize BPQDs.
  • Characterization of BPQDs confirmed their size (lateral size of 4.9±1.6 nm, thickness of 1.9±0.9 nm, ~4±2 layers).
  • A flexible memory device was fabricated using BPQDs mixed with polyvinylpyrrolidone as the active layer.

Main Results:

  • The synthesis yielded black phosphorus quantum dots (BPQDs) with controlled dimensions.
  • The fabricated flexible memory device demonstrated a nonvolatile rewritable memory effect.
  • The device exhibited a high ON/OFF current ratio and good operational stability.

Conclusions:

  • The developed method offers a high-yield, facile route to BPQDs.
  • BPQDs are promising candidates for next-generation flexible electronic memory devices.
  • The proof-of-concept device highlights the potential of BPQDs in advanced electronic applications.