TY - JOUR
T1 - Real-Time Imaging of the Formation of Au-Ag Core-Shell Nanoparticles
AU - Tan, Shu Fen
AU - Chee, See Wee
AU - Lin, Guanhua
AU - Bosman, Michel
AU - Lin, Ming
AU - Mirsaidov, Utkur
AU - Nijhuis, Christian A.
PY - 2016/4/27
Y1 - 2016/4/27
N2 - We study the overgrowth process of silver-on-gold nanocubes in dilute, aqueous silver nitrate solution in the presence of a reducing agent, ascorbic acid, using in situ liquid-cell electron microscopy. Au–Ag core–shell nanostructures were formed via two mechanistic pathways: (1) nuclei coalescence, where the Ag nanoparticles absorbed onto the Au nanocubes, and (2) monomer attachment, where the Ag atoms epitaxially deposited onto the Au nanocubes. Both pathways lead to the same Au–Ag core–shell nanostructures. Analysis of the Ag deposition rate reveals the growth modes of this process and shows that this reaction is chemically mediated by the reducing agent.
AB - We study the overgrowth process of silver-on-gold nanocubes in dilute, aqueous silver nitrate solution in the presence of a reducing agent, ascorbic acid, using in situ liquid-cell electron microscopy. Au–Ag core–shell nanostructures were formed via two mechanistic pathways: (1) nuclei coalescence, where the Ag nanoparticles absorbed onto the Au nanocubes, and (2) monomer attachment, where the Ag atoms epitaxially deposited onto the Au nanocubes. Both pathways lead to the same Au–Ag core–shell nanostructures. Analysis of the Ag deposition rate reveals the growth modes of this process and shows that this reaction is chemically mediated by the reducing agent.
U2 - 10.1021/jacs.6b00594
DO - 10.1021/jacs.6b00594
M3 - Article
SN - 0002-7863
VL - 138
SP - 5190
EP - 5193
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
IS - 16
ER -