| 초록 |
Hybrid metal-semiconductor nanostructures have attracted significant attention due to their synergistic properties that arise from the interaction between the two components. In this study, a new approach based on site-selective sulfidation at the corner sites of hexagonal Ag nanoplates has been suggested to produce the hybrid metal-semiconductor nanostructures. When sodium sulfide (Na2S), as a precursor for elemental S, was added to aqueous solution of hexagonal Ag nanoplates, Na2S could directly contact to elemental Ag and generate Ag2S. Interestingly, reaction was initiated at the corner sites of hexagonal Ag nanoplates and grew to the center. Absorption spectra of hybrid Ag-Ag2S nanoplates showed red shifting and decreasing in intensity in visible region, while the absorption in the UV region increased after sulfidation. Ratio of S to Ag and morphology of the hybrid structures could be controlled by adjusting the concentration of Na2S. |
