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Metallic Solids

Metallic Solids

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 malleability....

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Updated: Jul 1, 2025

Simultaneous Multi-surface Anodizations and Stair-like Reverse Biases Detachment of Anodic Aluminum Oxides in Sulfuric and Oxalic Acid Electrolyte

Simultaneous Multi-surface Anodizations and Stair-like Reverse Biases Detachment of Anodic Aluminum Oxides in Sulfuric and Oxalic Acid Electrolyte

Published on: October 5, 2017

Long-Range Atomic Order on Double-Stepped Al₂O₃(0001) Surfaces.

Sander Smink^1,2, Lena N Majer¹, Hans Boschker³

¹Max Planck Institute for Solid State Research, Heisenbergstraße 1, 70569, Stuttgart, Germany.

Advanced Materials (Deerfield Beach, Fla.)

|March 8, 2024

Summary

Researchers developed a fast method to create highly ordered single-crystalline aluminum oxide (Al2O3) surfaces. This breakthrough enables atomic coherence on large terraces, advancing materials science and technology.

Keywords:

atomic order laser heating sapphire surface

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Last Updated: Jul 1, 2025

Simultaneous Multi-surface Anodizations and Stair-like Reverse Biases Detachment of Anodic Aluminum Oxides in Sulfuric and Oxalic Acid Electrolyte

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Facile Preparation of Ultrafine Aluminum Hydroxide Particles with or without Mesoporous MCM-41 in Ambient Environments

Facile Preparation of Ultrafine Aluminum Hydroxide Particles with or without Mesoporous MCM-41 in Ambient Environments

Published on: May 11, 2017

Area of Science:

Surface Science
Materials Science
Crystallography

Background:

Highly ordered single-crystalline surfaces are crucial for understanding advanced material properties.
Previous methods for preparing such surfaces are often slow or complex.

Purpose of the Study:

To present a fast and straightforward method for preparing vicinal aluminum oxide (Al2O3)(0001) surfaces.
To achieve micrometer-scale atomic order on these surfaces.

Main Methods:

Utilized a novel preparation technique for vicinal Al2O3(0001) surfaces.
Characterized surface order using electron diffraction, observing up to 20th order spots.

Main Results:

Demonstrated atomic coherence on terraces wider than 1 micrometer.
Identified unique Al2O3(0001) properties enabling this coherence: high-temperature stability, distinct surface vs. bulk bonding, and polar/non-polar step edges.
Observed alternating step edge configurations driving a step-doubling transition.

Conclusions:

The developed method sets a new benchmark for high-quality surface preparation.
Expanded possibilities for fundamental research and technological applications of advanced materials.