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Centimeter-Long Single-Crystalline Si Nanowires.

Bing-Chang Zhang1,2, Hui Wang1, Le He2

  • 1Key Laboratory of Photochemical Conversion and Optoelectronic Materials and CityU-CAS Joint Laboratory of Functional Materials and Devices, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences , Beijing, 100190, People's Republic of China.

Nano Letters
|November 30, 2017
PubMed
Summary

Researchers created ultralong silicon nanowires (Si NWs) up to 2 cm, enabling miniaturized devices. These flexible Si NWs are key for advanced flexible electronics and sensors.

Keywords:
Ultralong nanostructuresVLSflexible electronicssilicon nanowiresstrain sensors

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Electronics Engineering

Background:

  • Macroscopic functional nanostructures offer unique properties for advanced applications.
  • Preparing one-dimensional (1D) silicon nanostructures with millimeter-scale lengths remains a significant challenge.

Purpose of the Study:

  • To develop a method for producing ultralong single-crystalline silicon nanowires (Si NWs).
  • To demonstrate the potential of these Si NWs in novel device applications, particularly flexible electronics.

Main Methods:

  • Development of a novel preparation technique for ultralong Si NWs.
  • Characterization of the structural and mechanical properties of the synthesized Si NWs.

Main Results:

  • Successfully synthesized single-crystalline Si NWs with lengths up to 2 cm.
  • Demonstrated augmented flexibility in the ultralong Si NWs.
  • Fabricated the first wearable joint motion sensor based on a single Si NW with superior performance.

Conclusions:

  • The preparation of ultralong Si NWs overcomes a major fabrication hurdle.
  • These nanowires are promising for miniaturizing macroscopic devices and advancing flexible electronics.
  • The developed Si NWs will drive innovation in electric, optical, medical, and mechanical devices.