Fabrication of CdSe Quantum Dot-Polymer Composites for Radiation Shielding
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초록
내용
Quantum dot (QDs) exhibits various luminescent properties depending on its size, composition, surface ligands, and the surrounding dispersed solvent. In particular, CdSe QD has a potential application as a radiation shielding material due to its heavy metal (Cd and Se) contents, which are effective to shield a neutron and gamma radiation, respectively. Since the CdSe has a hydrophobic surface during the synthesis process, it is difficult to utilize the solvent processing in aqueous solutions. To address this issue, we modified the hydrophobic surface of CdSe by physically adsorbing amphiphilic molecules onto its surface. This process allows us to mix the prepared CdSe with the hydrophilic Agarose polymer, resulting in a hydrogel of the CdSe-polymer complex. In this presentation, we will present the characteristics of CdSe-Agarose polymer composite itself and the result of radiation shielding efficiency for neutron and X-ray. We also present to compare the measured results with the Monte Carlo calculation for the radiation shielding.