ArticleScientific reports2026
Computational study of hybrid DDQ/LiI/WO₃ composites for multi-radiation shielding in microelectronic applications.
Article in Scientific reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Effective radiation shielding is essential for ensuring the long-term reliability and operational safety of sensitive electronic systems operating in radiation-harsh environments, including radiotherapy facilities, nuclear reactors, and space missions. In this study, novel DDQ/LiI/WO₃ hybrid composites containing 0-35 wt% WO₃ were proposed and systematically evaluated as lightweight multi-radiation shielding materials against photons, charged particles, and neutrons. Photon attenuation was investigated using MCNP and PHY-X, while SRIM and ESTAR were used to assess charged-particle interactions, and the fast-neutron removal cross section was evaluated for neutron attenuation. Increasing WO₃ loading significantly enhanced photon attenuation; at 0.1 MeV, the optimized MC-W35 composite achieved a mass attenuation coefficient of 1.778 cm²/g and a low half-value layer of 0.135 cm. From a mass-efficiency perspective, MC-W35 exhibited a notably low areal density of 0.39 g/cm² per HVL, corresponding to more than 90% lower shielding mass than conventional epoxy and polyimide matrices and approximately a ten-fold reduction relative to ordinary concrete. Secondary-radiation analysis further showed that photon-induced radiation yield decreases rapidly above 1 MeV, while electron-induced Bremsstrahlung remains suppressed, reaching less than 0.16 at 10 MeV, owing to the low average atomic number of the DDQ matrix. The enhanced fast-neutron attenuation and reduced charged-particle ranges further demonstrate the multi-radiation shielding capability of the composite. Overall, these findings identify DDQ/LiI/WO₃ hybrid composites, particularly MC-W35, as promising lightweight candidates for radiation protection of electronic systems and components operating in diverse medical, industrial, nuclear, and space radiation environments.
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