Sparking method has been demonstrated as a powerful method in nanoparticles synthesis. In this research, we proposed a UV light irradiation strategy to enhance the nanoparticle fabrication technique. The sparking method was performed under UV light irradiation without heat treatment for In₂O₃ nanoparticle films preparation. The results showed that UV light can effect on properties of In₂O₃ nanoparticle films as a function of light intensity. The mechanism was proposed based on photoelectric effect. Under UV light irradiation, the In₂O₃ nanoparticles aggregated and accumulated faster and efficiency of adhesion between particles during their collisions was improved. Additionally, the band gap energy of In₂O₃ decreased with increasing the intensity of UV light irradiation.

An experimental technique to determine the outcome of the interaction of gamma-rays with the given nanoparticles is contributed. The interactions involve gamma-rays of energies used in practical applications. The technique determines the outcomes directly. The variations in the number of counts and shape of pulse height spectra obtained before and after loading the nanoparticles into a liquid scintillator for given gamma-ray irradiation under identical conditions reveal the outcome of the interactions. Results reveal that the interaction of low-energy gamma-rays such as those from ²⁴¹Am, ¹³³Ba with the nanoparticles tested resulted in the emission of electrons from the nanoparticles. Among the nanoparticles tested, Gd₂O₃ emitted the greatest number of electrons. Photons with energy lying between 14 keV and 81 keV undergo greater interaction with the nanoparticles than those with other energies. High-energy gamma-rays transmit through the nanoparticles without interaction. The technique distinguishes the abundance and energy profile of electrons emitted from different nanoparticles upon irradiation with gamma-rays. Results enable test-selection of nanoparticles for applications such as the development of fast-efficient-large-affordable gamma-detectors, nanoparticle radiosensitization for cancer treatment, and the development of Pb-free efficient radiation shields for healthcare workers.

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Jenny
Journal Co-ordinator
Journal of Nano Research & Applications