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Updated: Mar 18, 2026

Ultrahigh Density Array of Vertically Aligned Small-molecular Organic Nanowires on Arbitrary Substrates

Ultrahigh Density Array of Vertically Aligned Small-molecular Organic Nanowires on Arbitrary Substrates

Published on: June 18, 2013

Ultralight High-Entropy Nanowire Scaffolds for Extreme-Temperature Functionality.

Cameron S Jorgensen^1,2,3, Corisa Kons¹, William Stallions¹

¹Materials Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States.

ACS Applied Materials & Interfaces

|March 17, 2026

Summary

This summary is machine-generated.

We developed ultralight, high-entropy alloy (HEA) metamaterials using entropy engineering and structural porosity. These novel materials offer metal-like functionality at extremely low densities for demanding applications.

Keywords:

aerogel electrodeposition ferromagnetism freeze-casting high-entropy alloys low-density nanowires ultralight metamaterials

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Published on: April 16, 2017

Area of Science:

Materials Science
Nanotechnology
Metallurgy

Background:

High-entropy alloys (HEAs) offer tunable properties but suffer from high density.
Lightweight materials are crucial for advanced applications, yet traditional metals are often too dense.

Purpose of the Study:

To engineer lightweight functional materials by combining high-entropy alloys with structural porosity.
To achieve metal-like properties at ultralow densities using entropy-architected metamaterials.

Main Methods:

Electrodeposition of FeCoNiCrCu HEA nanowires into porous templates.
Freeze-casting to create 3D "bird's nest" scaffolds with densities <1% of bulk metal.
Structural, magnetic, and thermal property characterization.

Main Results:

Achieved ultralow density metamaterials (<1% of bulk metal density).
Retained disordered face-centered-cubic phase with Curie temperatures >1000 K.
Demonstrated thermal diffusivity comparable to titanium alloys (≈0.211 mm² s⁻¹).
Identified nanoscale Cu segregation enhancing magnetic ordering and thermal stability.

Conclusions:

Entropy-architected nanowire metamaterials offer a pathway to ultralightweight functional materials.
Co-engineering configurational entropy and architectural hierarchy enables high-temperature performance.
These materials are suitable for extreme-environment applications requiring low density and high functionality.