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Multidimensional Characterization of Mixed Ligand Nanoparticles Using Small Angle Neutron Scattering
- Source :
- Chemistry of Materials
- Publication Year :
- 2019
- Publisher :
- American Chemical Society (ACS), 2019.
-
Abstract
- The properties of ligand protected gold nanoparticles are determined by the synergistic interplay of their structural components, including the metal core, the ligand shell, and the solvation layer. However, the simultaneous characterization of all these components remains a major challenge given their disparate chemical nature. In the case of mixed ligand nanoparticles, this task becomes daunting due to the presence of intercorrelated additional parameters such as the ligand ratio, ligand spatial distribution, and solvation of the heterogeneous ligand shell. Here we show that small angle neutron scattering (SANS) is a tool capable of simultaneously characterizing the core and the ligand shell of monodisperse mixed ligand gold nanoparticles. We systematically examine how each parameter (e.g., the core size, the thickness, composition and the spatial heterogeneity of the ligand shell) affects nanoparticles' scattering profile. Quantitative information on these parameters is retrieved using analytical fitting as well as 3D modeling. Importantly, we show that SANS can evaluate the solvation degree of mixed ligand protected gold nanoparticles, a challenging task for any other characterization methods.
- Subjects :
- Materials science
General Chemical Engineering
Shell (structure)
Nanoparticle
02 engineering and technology
010402 general chemistry
01 natural sciences
Nanomaterials
Metal
nanocrystals
Materials Chemistry
surface
nanomaterials
scanning-tunneling-microscopy
behavior
Ligand
Solvation
General Chemistry
021001 nanoscience & nanotechnology
phase-separation
Small-angle neutron scattering
0104 chemical sciences
x-ray
shell
Colloidal gold
gold nanoparticles
visual_art
visual_art.visual_art_medium
Physical chemistry
protected metal nanoparticles
0210 nano-technology
Subjects
Details
- ISSN :
- 15205002 and 08974756
- Volume :
- 31
- Database :
- OpenAIRE
- Journal :
- Chemistry of Materials
- Accession number :
- edsair.doi.dedup.....6c9afdb57f213eb9ec454bfed572b1df