Characterization of acoustically engineered polymer nanocomposite metamaterials using x-ray microcomputed tomography

Area of Science:

• Materials Science
• Nanotechnology
• Acoustic Engineering

Background:

• Metamaterials offer unique properties by controlling structure at the nanoscale.
• Fabricating complex 3D metamaterials with precise internal structures remains a challenge.

Purpose of the Study:

• To demonstrate a novel method for fabricating 3D acoustically engineered diamond nanoparticle metamaterials.
• To characterize the internal microstructure of these metamaterials using X-ray microcomputed tomography (XμCT).
• To lay the groundwork for finite-element modeling of metamaterial properties.

Main Methods:

• Utilizing ultrasound standing waves to pattern 5-nm diamond nanoparticles in epoxy.
• Employing X-ray microcomputed tomography (XμCT) for internal structure mapping and quality control.
• Varying ultrasound frequency to control pattern periodicity.

Main Results:

• Successful fabrication of 3D metamaterial structures with patterned diamond nanoparticles.
• Demonstration of tunable periodicity by altering ultrasound frequency.
• XμCT effectively characterized the internal microstructure and confirmed structural integrity.

Conclusions:

• Acoustic patterning provides a viable method for creating 3D diamond nanoparticle metamaterials.
• XμCT is a crucial tool for quality control and characterization of these complex structures.
• The fabricated metamaterials and characterization data can inform the development of predictive models for functional properties.