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    Ripening of Gold Clusters into a Single Domain on Semiconductor Quantum Rods during Langmuir-Blodgett Deposition

    Year: 2020

    Journal: Cryst. Growth Des., Volume 20, SEP 2, page 5890–5895

    Authors: Tang, X; Li, XH

    Organizations: King Abdullah University of Science and TechnologyKing Abdullah University of Science & Technology [BAS/1/1664-01-01, URF/1/3437-01-01, URF/1/3771-01-01]; King Abdullah University of Science and Technology (GCC Research Council Grant) [REP/1/3189-01-01]

    Rapidly forming, large gold nanocrystals (similar to 10 nm) on CdSe/CdS nanorods while maintaining the nanorod geometry remains challenging. In this study, we demonstrate that by using Langmuir-Blodgett (LB) deposition, numerous tiny gold nanocrystals (2-3 nm) can ripen into a single gold nanocrystal with a size of 8-9 nm on each nanorod within 4 h. Thanks to the room temperature condition and low corrosiveness of the chemicals used in the technique, the nanorod geometry was perfectly maintained. Besides, the reaction was found to be accompanied by a ligand exchange procedure, which perhaps resulted in a hydrophobic/hydrophilic Janus structure on the final hybrid nanoparticles.
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