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Related Experiment Video

Updated: Jun 26, 2025

$Characterization of Ultra-fine Grained and Nanocrystalline Materials Using Transmission Kikuchi Diffraction$

Characterization of Ultra-fine Grained and Nanocrystalline Materials Using Transmission Kikuchi Diffraction

Published on: April 1, 2017

Picometer-Scale Atomic Shifts Governing Subdisordered Structures in Diamond.

Junfeng Cui^1,2, Yingying Yang³, Mingyang Yang¹

¹Key Laboratory of Advanced Marine Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China.

|May 9, 2024

Summary

This summary is machine-generated.

Subdisordered structures in diamond explain the long-unclear n-diamond structure. Picometer-scale atomic shifts govern these structures, significantly altering diamond

Keywords:

atomic shift bandgap diamond electronic property subdisordered nanostructure

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Last Updated: Jun 26, 2025

$Characterization of Ultra-fine Grained and Nanocrystalline Materials Using Transmission Kikuchi Diffraction$

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Published on: April 1, 2017

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$Synthesis and Microdiffraction at Extreme Pressures and Temperatures$

Synthesis and Microdiffraction at Extreme Pressures and Temperatures

Published on: October 7, 2013

Area of Science:

Materials Science
Solid-State Physics
Crystallography

Background:

Diamond is a leading semiconductor material due to its exceptional properties.
The n-diamond structure, discovered over 30 years ago, remains poorly understood.
Clarifying n-diamond's structure is crucial for advanced semiconductor applications.

Purpose of the Study:

To elucidate the crystallographic structure and properties of n-diamond.
To explain the structural features of n-diamond using subdisordered structures.
To investigate the relationship between atomic structure and electronic properties in diamond.

Main Methods:

Synthesis of monocrystalline diamond with subdisordered structures via chemical vapor deposition.
Atomic-resolution scanning transmission electron microscopy (STEM) for structural characterization.
Picometer-precision peak finder technology and diffraction simulations.
First-principles calculations for electronic property analysis.

Main Results:

Subdisordered structures in diamond explain the features of n-diamond.
Picometer-scale atomic shifts within diamond unit cells were identified as the cause of subdisordered structures.
Experimental and computational results show a rapid decrease in diamond's bandgap with increasing atomic shift distance.

Conclusions:

The study clarifies the crystallographic structure and electronic properties of n-diamond.
Subdisordered structures, driven by atomic shifts, are key to understanding n-diamond.
New insights into bandgap engineering in diamond semiconductors are provided.