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Related Experiment Video

Updated: Jun 5, 2026

Preparation of ZnO Nanorod/Graphene/ZnO Nanorod Epitaxial Double Heterostructure for Piezoelectrical Nanogenerator by Using Preheating Hydrothermal
10:39

Preparation of ZnO Nanorod/Graphene/ZnO Nanorod Epitaxial Double Heterostructure for Piezoelectrical Nanogenerator by Using Preheating Hydrothermal

Published on: January 15, 2016

Scalable network electrical devices using ZnO nanowalls.

Chul-Ho Lee1, Yong-Jin Kim, Joohyung Lee

  • 1National Creative Research Initiative Center for Semiconductor Nanorods and Department of Physics and Astronomy, Seoul National University, Seoul, Korea.

Nanotechnology
|December 24, 2010
PubMed
Summary
This summary is machine-generated.

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We developed scalable zinc oxide (ZnO) nanowall networks for sensitive gas detection. These single-crystalline nanowall networks exhibit unique electrical properties, enabling highly sensitive gas sensing applications.

Area of Science:

  • Materials Science
  • Nanotechnology
  • Semiconductor Physics

Background:

  • Nanowire and nanowall networks offer unique properties for electronic devices.
  • Scalable fabrication of high-quality nanowall networks is crucial for practical applications.
  • Metal-organic vapor-phase epitaxy (MOVPE) is a key technique for controlled nanowire growth.

Purpose of the Study:

  • To fabricate scalable, single-crystalline zinc oxide (ZnO) nanowall networks.
  • To investigate the electrical characteristics and conductance scaling behavior of these networks.
  • To demonstrate the potential of ZnO nanowall networks in gas sensor applications.

Main Methods:

  • Selective-area MOVPE growth of ZnO nanowalls on AlN/Si substrates with a SiO(2) mask.
  • Characterization using X-ray diffraction (XRD) and transmission electron microscopy (TEM).

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Last Updated: Jun 5, 2026

Preparation of ZnO Nanorod/Graphene/ZnO Nanorod Epitaxial Double Heterostructure for Piezoelectrical Nanogenerator by Using Preheating Hydrothermal
10:39

Preparation of ZnO Nanorod/Graphene/ZnO Nanorod Epitaxial Double Heterostructure for Piezoelectrical Nanogenerator by Using Preheating Hydrothermal

Published on: January 15, 2016

Fabricating Nanogaps by Nanoskiving
07:36

Fabricating Nanogaps by Nanoskiving

Published on: May 13, 2013

  • Electrical conductivity measurements as a function of nanowall dimensions.

    • Main Results:

    • Achieved heteroepitaxial, single-crystalline ZnO nanowalls with c-axis orientation.
    • Observed linear increase in conductance with channel width (>1 µm) and saturation (<1 µm).
    • Demonstrated highly sensitive gas detection using the fabricated nanowall network devices.

    Conclusions:

    • Scalable fabrication of high-quality ZnO nanowall networks is feasible.
    • Electrical properties are influenced by nanowall dimensions and network density.
    • ZnO nanowall networks show significant promise for advanced gas sensing technologies.