Please use this identifier to cite or link to this item: https://doi.org/10.1021/jacs.8b05217
Title: In Situ Kinetic and Thermodynamic Growth Control of Au−Pd Core− Shell Nanoparticles
Authors: TAN SHU FEN 
GEETA BISHT 
UTKARSH ANAND 
MICHEL BOSMAN 
Xin Ee Yong
UTKUR MIRZIYODOVICH MIRSAIDOV 
Keywords: Palladium,Diffusion,Gold,Bimetals,Transmission electron microscopy
Issue Date: 2018
Publisher: American Chemical Society
Citation: TAN SHU FEN, GEETA BISHT, UTKARSH ANAND, MICHEL BOSMAN, Xin Ee Yong, UTKUR MIRZIYODOVICH MIRSAIDOV (2018). In Situ Kinetic and Thermodynamic Growth Control of Au−Pd Core− Shell Nanoparticles. Journal Of American Chemical Society 140 : 11680−11685. ScholarBank@NUS Repository. https://doi.org/10.1021/jacs.8b05217
Rights: CC0 1.0 Universal
Related Datasets: DOI:10.1021/jacs.8b05217
Abstract: One-pot wet-chemical synthesis is a simple way to obtain nanoparticles (NPs) with a well-defined shape and composition. However, achieving good control over NP synthesis would require a comprehensive understanding of the mechanisms of NP formation, something that is challenging to obtain experimentally. Here, we study the formation of gold (Au) core−palladium (Pd) shell NPs under kinetically and thermodynamically controlled reaction conditions using in situ liquid cell transmission electron microscopy (TEM). By controlling the reaction temperature, we demonstrate that it is possible to tune the shape of Au nanorods to Au−Pd arrowheaded structures or to cuboidal core−shell NPs. Our in situ studies show that the reaction temperature can switch the Pd shell growth between the kinetically and thermodynamically dominant regimes. The mechanistic insights reported here reveal how the reaction temperature affects the packing of the capping agents and how the facet selection of depositing shell atoms drives the shell formation under different kinetic conditions, which is useful for synthesizing NPs with greater design flexibility in shape and elemental composition for various technological applications.
Source Title: Journal Of American Chemical Society
URI: https://scholarbank.nus.edu.sg/handle/10635/177657
ISSN: 00027863
DOI: 10.1021/jacs.8b05217
Rights: CC0 1.0 Universal
Appears in Collections:Elements
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