Lee Hu-Jun, Hanyu Daisuke, Dao Anh Thi Ngoc, Kaneko Kenji
Department of Materials, Graduate School of Engineering, , Kyushu University, 744, Motooka, Nishi, Fukuoka, 819-0395, Japan.
Institute of Advanced Composite Materials, Korea Institute of Science and Technology (KIST), Wanju-gun, Jeonbuk, 55324, Republic of Korea.
Sci Rep. 2025 Aug 12;15(1):29474. doi: 10.1038/s41598-025-09572-0.
Bimetallic Au@Pt dendritic core-shell nanoparticles were synthesized via co-reduction with ultrasonication, and their nanostructures were characterized to gain insights into the formation mechanism of the Pt shell on the Au core. Two types of nanoparticles, one with ultrasonication and another without, were prepared and examined by scanning transmission electron microscopy to understand the role of ultrasonication. With or without ultrasonication, a thin layer of Pt shell was present on the Au core. The ultrasonication resulted in the Pt cluster formation from precursors, the Pt cluster dispersion, the Pt granule formation, and the Pt granule collision with the Au core. Consequently, Au@Pt nanoparticles were synthesized with the Pt dendritic shell consisting of Pt granules. These findings highlight the potential of ultrasonication in the controlled synthesis of nanoparticles with unique nanostructures.
通过超声共还原法合成了双金属Au@Pt树枝状核壳纳米粒子，并对其纳米结构进行了表征，以深入了解Pt壳在Au核上的形成机制。制备了两种纳米粒子，一种进行了超声处理，另一种未进行超声处理，并通过扫描透射电子显微镜进行了检测，以了解超声处理的作用。无论有无超声处理，Au核上均存在一层薄的Pt壳。超声处理导致前驱体形成Pt簇、Pt簇分散、Pt颗粒形成以及Pt颗粒与Au核碰撞。因此，合成了具有由Pt颗粒组成的Pt树枝状壳的Au@Pt纳米粒子。这些发现突出了超声处理在可控合成具有独特纳米结构的纳米粒子方面的潜力。
