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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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Related Experiment Video

Updated: Mar 3, 2026

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

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

Published on: April 1, 2017

Discovery of Hexagonal Structured Pd-B Nanocrystals.

Keigo Kobayashi¹, Hirokazu Kobayashi^1,2, Mitsuhiko Maesato¹

¹Division of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-Oiwakecho, Sakyo-ku, Kyoto, 606-8502, Japan.

Angewandte Chemie (International Ed. in English)

|May 5, 2017

Summary

Heavy boron doping transforms face-centered cubic palladium into hexagonal close-packed palladium-boron nanocrystals. This doping significantly suppresses palladium

Keywords:

boron magnetic properties nanocrystals palladium solid-state chemistry

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Gyroid Nickel Nanostructures from Diblock Copolymer Supramolecules

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Area of Science:

Materials Science
Nanotechnology
Solid State Physics

Background:

Palladium (Pd) is known for its large paramagnetic susceptibility.
Nanocrystal (NC) synthesis allows for tuning material properties.
Controlling crystal structure and electronic properties is crucial for advanced materials.

Purpose of the Study:

To synthesize hexagonal close-packed (hcp) palladium-boron (Pd-B) nanocrystals (NCs).
To investigate the effect of heavy boron doping on the structure and magnetic properties of palladium NCs.
To understand the relationship between electronic structure modifications and magnetic property changes.

Main Methods:

Synthesis of Pd-B NCs via heavy B doping into face-centered cubic (fcc) Pd NCs.
Characterization using scanning transmission electron microscopy-electron energy loss spectroscopy (STEM-EELS).
Structural analysis using synchrotron powder X-ray diffraction (XRD).
Electronic structure investigation using X-ray absorption near-edge structure (XANES).
Theoretical calculations.

Main Results:

Successfully synthesized hcp Pd-B NCs through heavy B doping.
Homogeneous distribution of B atoms within the hcp Pd lattice confirmed by STEM-EELS and XRD.
Significant suppression of the large paramagnetic susceptibility of Pd observed in Pd-B NCs.
Reduced density of states at the Fermi energy corroborated by XANES and theoretical calculations.

Conclusions:

Heavy boron doping is an effective method to induce a phase transformation to hcp in palladium nanocrystals.
The observed magnetic property changes are directly linked to the altered electronic structure at the Fermi level.
These findings offer insights into the design of novel magnetic and electronic materials based on doped palladium nanostructures.