Recently, a research group from Hefei Institutes of Physical Sciences of Chinese Academy of Sciences, developed an antielectric potential growth method for large-area preparation of Au-Ag heterodimer arrays.
Researchers realize controlled synthesis of Au-Ag heterodimer arrays for high-resolution encrypted informationCharacterization of Au-Ag dimer arrays. Schematic of Au-Ag dimer arrays with different morphologies of Ag NPs. SEM images of Au-Ag dimer arrays. Dark-field optical images of patterned Au-Ag dimer arrays with line widths of 4 μm . Credit: ZENG Pan
In this study, researchers proposed an antielectric potential strategy to realize the in situ growth of Ag NPs on Au nanosphere The Au NSs seed arrays were modified with the 5-amino-2-mercapto benzimidazole ligand to increase the interfacial energy, which was able to overcome the electric potential resistance between the Au NSs and the substrate for the nucleation of Ag ions. By modulating the kinetic factors, the morphology, size and number of growing Ag NPs can be precisely regulated.
This work demonstrates a facile and large-area controllable method to prepare multidimensional dimers arrays, which promotes the development of plasmonic metal arrays in the field of optical information encryption.: Researchers realize controlled synthesis of Au-Ag heterodimer arrays for high-resolution encrypted information retrieved 29 May 2024 from https://phys.org/news/2024-05-synthesis-au-ag-heterodimer-arrays.
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