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Related Experiment Video

Updated: Jun 23, 2026

Nanofabrication of Gate-defined GaAs/AlGaAs Lateral Quantum Dots
15:47

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Published on: November 1, 2013

Silicon-Driven Facet Regulation Enables Tunable Micro-Diamond Architectures in Liquid Ga-In.

Zhi Jiang1,2, Xueying Zhang1,2, António José Silva Fernandes3

  • 1Centre for Mechanical Technology and Automation (TEMA), Mechanical Engineering Department, University of Aveiro, Aveiro, Portugal.

Small (Weinheim an Der Bergstrasse, Germany)
|June 22, 2026
PubMed
Summary

We developed a new method for growing microscale diamonds at low temperatures and ambient pressure using liquid metal. This technique allows for precise control over diamond shape and size, opening new possibilities for material applications.

Keywords:
chemical vapor depositiondiamondferroceneliquid metal

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Last Updated: Jun 23, 2026

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Chemical Engineering

Background:

  • Liquid-metal-assisted synthesis is a promising route for diamond growth.
  • Existing methods often require high temperatures and pressures.
  • Controlling diamond morphology and size remains a challenge.

Purpose of the Study:

  • To develop a novel ambient-pressure, low-temperature chemical vapor deposition (CVD) strategy for shape-programmable microscale diamond growth.
  • To achieve size scaling and facet regulation of single-crystal diamonds.

Main Methods:

  • Utilized a liquid-metal Gallium-Indium (Ga-In) alloy with ferrocene as the carbon precursor.
  • Employed nanodiamond seeds for nucleation and nanosilicon for habit control.
  • Optimized hydrogen (H2) flow rate for crystal size scaling.

Main Results:

  • Successfully synthesized single-crystal diamonds ranging from ~10 µm to ~50 µm.
  • Achieved shape control, producing cubic, truncated-tetrahedral, and octahedral diamond crystals.
  • Demonstrated growth at 900°C and 1 atm, significantly milder conditions than traditional methods.

Conclusions:

  • The liquid-metal-assisted CVD strategy offers a practical route for tunable microscale single-crystal diamond production.
  • This method enables precise control over diamond morphology and size under mild conditions.
  • The approach holds potential for advanced applications requiring tailored diamond microstructures.