Abstract
Here we report an optimized hot-injection method and a phase transfer strategy for the synthesis of water-soluble CuInS2 QDs with desired properties. The structure and morphology studies demonstrate that the resulting QDs are CuInS2 tetragonal phase with well-defined facets. It is also found that the crystal size gradually increases with the increase of reaction temperature, while the surface of QDs with pre- and post-phase transfer is functionalized with hydrophobic and hydrophilic ligands, respectively. Spectroscopy measurements reveal the size-dependent optical properties of CuInS2 QDs, demonstrating the quantum confinement effect in this system.
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