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Related Concept Videos

Metallic Solids02:37

Metallic Solids

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Metallic solids such as crystals of copper, aluminum, and iron are formed by metal atoms. The structure of metallic crystals is often described as a uniform distribution of atomic nuclei within a “sea” of delocalized electrons. The atoms within such a metallic solid are held together by a unique force known as metallic bonding that gives rise to many useful and varied bulk properties.
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and...
18.1K

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Updated: May 16, 2025

Spatial Separation of Molecular Conformers and Clusters
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Packaging Metal Atomic Clusters for Universal and Robust Protection through Cluster Beam Process.

Siqi Lu1,2,3, Zixiang Zhao1,2,3, Jinsen Han4,5,6,7

  • 1National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, and School of Physics, Nanjing University, Nanjing, 210093, P. R. China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|April 3, 2025
PubMed
Summary

Researchers developed a novel method to protect delicate gas-phase metal clusters by implanting them into polymethyl methacrylate (PMMA). This technique offers robust and universal protection for various clusters, enabling further research and applications.

Keywords:
agglomeration resistancecluster beam implantationoxidation resistancepolymer packaginguniversal protection

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Surface Chemistry

Background:

  • Gas-phase metal clusters are crucial building blocks for materials but are prone to damage upon vacuum transfer.
  • Effective protection strategies are needed to preserve the integrity of these delicate nanostructures.

Purpose of the Study:

  • To present a novel cluster packaging and protection strategy using controllable beam implantation into polymethyl methacrylate (PMMA).
  • To achieve nondestructive packaging of atomically precise clusters under soft-landing conditions.

Main Methods:

  • Size selection of gas-phase metal clusters.
  • Controllable cluster beam implantation into polymethyl methacrylate (PMMA).
  • Synergistic heating of PMMA during cluster implantation.

Main Results:

  • Achieved nondestructive packaging of size-selected gas-phase clusters within PMMA.
  • Demonstrated robust protection against oxidation (Mo clusters >30 days in air) and agglomeration (up to 100°C or in liquid).
  • Showcased universal protection for diverse clusters including Mo, Ta, Cu, W, and (Re-Mo) alloys of various sizes.

Conclusions:

  • The developed PMMA implantation method provides stable and effective protection for gas-phase metal clusters.
  • The protection mechanism involves weak PMMA-cluster bonding and direct implantation into a solid matrix.
  • This strategy facilitates future investigations and applications of protected gas-phase metal clusters.