| Summary: | The effect of scintillator particle size on high-resolution X-ray imaging was studied using zinc tungstate (ZnWO<sub>4</sub>) particles. The ZnWO<sub>4</sub> particles were fabricated through a solid-state reaction between zinc oxide and tungsten oxide at various temperatures, producing particles with average sizes of 176.4 nm, 626.7 nm, and 2.127 μm; the zinc oxide and tungsten oxide were created using anodization. The spatial resolutions of high-resolution X-ray images, obtained from utilizing the fabricated particles, were determined: particles with the average size of 176.4 nm produced the highest spatial resolution. The results demonstrate that high spatial resolution can be obtained from ZnWO<sub>4</sub> nanoparticle scintillators that minimize optical diffusion by having a particle size that is smaller than the emission wavelength.
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