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Understanding the Effect of Iodide Ions on the Morphology of Gold Nanorods
Author(s) -
Amini Mozhgan N.,
Altantzis Thomas,
Lobato Ivan,
Grzelczak Marek,
SánchezIglesias Ana,
Aert Sandra,
LizMarzán Luis M.,
Partoens Bart,
Bals Sara,
Neyts Erik C.
Publication year - 2018
Publication title -
particle and particle systems characterization
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.877
H-Index - 56
eISSN - 1521-4117
pISSN - 0934-0866
DOI - 10.1002/ppsc.201800051
Subject(s) - nanorod , iodide , ion , rod , adsorption , materials science , morphology (biology) , nanotechnology , characterization (materials science) , anisotropy , chemical physics , crystallography , chemical engineering , chemistry , inorganic chemistry , optics , organic chemistry , physics , geology , engineering , medicine , paleontology , alternative medicine , pathology
The presence of iodide ions during the growth of gold nanorods strongly affects the shape of the final products, which is proposed to be due to selective iodide adsorption on certain crystallographic facets. Therefore, a detailed structural and morphological characterization of the starting rods is crucial toward understanding this effect. Electron tomography is used to determine the crystallographic indices of the lateral facets of gold nanorods, as well as those present at the tips. Based on this information, density functional theory calculations are used to determine the surface and interface energies of the observed facets and provide insight into the relationship between the amount of iodide ions in the growth solution and the final morphology of anisotropic gold nanoparticles.