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

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X-ray transmission through nanostructured and microstructured CuO materials.

M Z Botelho¹, R Künzel, E Okuno

¹Área de Ciências Tecnológicas, Centro Universitário Franciscano, Rua dos Andradas, 1614, CEP 97010-032 Santa Maria, RS, Brazil.

Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine

|November 30, 2010

Summary

X-ray transmission differs between copper oxide (CuO) nanoparticles and microparticles, especially at lower energies. Nanostructured CuO plates showed significantly higher X-ray attenuation, suggesting particle size impacts radiation shielding effectiveness.

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Area of Science:

Materials Science
Physics
Nanotechnology

Background:

X-ray transmission is crucial for radiation shielding applications.
Understanding the influence of material morphology on X-ray attenuation is essential.

Purpose of the Study:

To compare X-ray transmission through copper oxide (CuO) microparticles and nanoparticles.
To investigate the effect of particle size on X-ray attenuation in beeswax composites.

Main Methods:

CuO nanoparticles (13.4 nm) and microparticles (56 μm) were incorporated into beeswax at 5% concentration.
X-ray transmission was measured using beams generated at various tube voltages (26-102 kV).

Main Results:

X-ray transmission was similar for micro- and nano-CuO at higher voltages (60 and 102 kV).
At lower voltages (26 and 30 kV), nanostructured CuO plates exhibited at least 14% greater X-ray attenuation.
This difference was attributed to a higher particle count per gram and grain size effects in the nanoparticle samples.

Conclusions:

Particle size significantly influences X-ray attenuation, particularly at low energies.
Nanostructured materials, like CuO nanoparticles, offer enhanced attenuation properties for specific X-ray energy ranges.
Findings are relevant for developing advanced radiation shielding materials.