Organic Dispersion of Mo<sub>3</sub>Se<sub>3</sub><sup>–</sup> Single-Chain Atomic Crystals Using Surface Modification Methods
Seungbae Oh, Sudong Chae, Minho Kwon, Jungyoon Ahn, Chaeheon Woo, Kyung Hwan Choi, Jiho Jeon, Xue Dong, Tae Yeong Kim, Ghulam Asghar, Hanyoung Kim, Hyun‐jong Paik, Hak Ki Yu, Jae‐Young Choi
In this study, single-chain atomic crystals (SCACs), Mo<sub>3</sub>Se<sub>3</sub><sup>-</sup>, which can be uniformly dispersed, with an atomically thin diameter of ∼0.6 nm were modified to disperse in an organic solvent. Various surfactants were chosen to provide steric hindrance to aqueous-dispersed Mo<sub>3</sub>Se<sub>3</sub><sup>-</sup> by modifying the surface of Mo<sub>3</sub>Se<sub>3</sub><sup>-</sup>. The organic dispersions of surface-modified Mo<sub>3</sub>Se<sub>3</sub><sup>-</sup> SCACs in nonpolar solvent (toluene, benzene, and chloroform) were stable with a uniform diameter of 2 nm, and they have enhanced stability from oxidation (>10 days). With the surfactants that have a polystyrene tail group (PS-NH<sub>2</sub>), the surface-modified Mo<sub>3</sub>Se<sub>3</sub><sup>-</sup> SCAC showed high compatibility with a polystyrene polymer matrix. Using the surface-modified Mo<sub>3</sub>Se<sub>3</sub><sup>-</sup> SCAC, a homogeneous Mo<sub>3</sub>Se<sub>3</sub><sup>-</sup>/polystyrene/toluene organogel was prepared. More importantly, the Mo<sub>3</sub>Se<sub>3</sub><sup>-</sup>/polystyrene organogel exhibits significantly enhanced mechanical properties, with the improvement of 202.27% and 279.52% for tensile strength and elongation, respectively, compared with that of the pure organogel. The surface-modified Mo<sub>3</sub>Se<sub>3</sub><sup>-</sup> had a similar structure with a polymer matrix, and the properties of the polymer can be improved even with a small addition of Mo<sub>3</sub>Se<sub>3</sub><sup>-</sup>.
https://doi.org/10.1021/acsnano.2c00965
Dispersion (optics)
Materials science
Surface modification
Chain (unit)
Physical chemistry
Analytical Chemistry (journal)
Chemistry
Physics
Optics
Organic chemistry
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