Morphology-Controlled Growth of Crystalline Ag-Pt-Alloyed Shells onto Au Nanotriangles and Their Plasmonic Properties
Publication date
2023-08-17
Authors
Xie, Xiaobin
van Huis, Marijn
van Blaaderen, Alfons
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Advisors
Supervisors
Document Type
Article
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Abstract
The surface plasmon resonance of noble-metal nanoparticles depends on nanoscale size, morphology, and composition, and provides great opportunities for applications in biomedicine, optoelectronics, (photo)catalysis, photovoltaics, and sensing. Here, we present the results of synthesizing ternary metallic or trimetallic nanoparticles, Au nanotriangles (Au NTs) with crystalline Ag-Pt alloyed shells, the morphology of which can be adjusted from a yolk-shell to a core-shell structure by changing the concentration of AgNO3 or the concentration of Au NT seeds, while the shell thickness can be precisely controlled by adjusting the concentration of K2PtCl4. By monitoring the growth process with UV-vis spectra and scanning transmission electron microscopy (STEM), the shells on the Au NT-Ag-Pt yolk-shell nanoparticles were found to grow via a galvanic replacement synergistic route. The plasmonic properties of the as-synthesized nanoparticles were investigated by optical absorbance measurements.
Keywords
Epitaxial-growth, Gold nanorods, Hydrogen generation, Anisotropic growth, Single-particle, Nanostructures, Ternary, Nanoparticles, Pd, Nanoprisms, Electronic, Optical and Magnetic Materials, General Energy, Surfaces, Coatings and Films, Physical and Theoretical Chemistry
Citation
Xie, X, van Huis, M A & van Blaaderen, A 2023, 'Morphology-Controlled Growth of Crystalline Ag-Pt-Alloyed Shells onto Au Nanotriangles and Their Plasmonic Properties', Journal of Physical Chemistry C, vol. 127, no. 32, pp. 16052-16060. https://doi.org/10.1021/acs.jpcc.3c02897