Journal Article

FZJ-2019-04682

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Multidimensional Characterization of Mixed Ligand Nanoparticles Using Small Angle Neutron Scattering

Luo, Z. (Corresponding author) ; Yang, Y. ; Radulescu, A.FZJ* ; Kohlbrecher, J. ; Darwish, T. A. ; Ong, Q. K. ; Guldin, S. ; Stellacci, F. (Corresponding author)

2019
American Chemical Society Washington, DC

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Please use a persistent id in citations: doi:10.1021/acs.chemmater.9b01209

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.

Keyword(s): Polymers, Soft Nano Particles and Proteins (1st) ; Soft Condensed Matter (2nd)

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Contributing Institute(s):

1. JCNS-FRM-II (JCNS-FRM-II)
2. Neutronenstreuung (JCNS-1)

Research Program(s):

1. 6G15 - FRM II / MLZ (POF3-6G15) (POF3-6G15)
2. 6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623) (POF3-623)

Experiment(s):

1. KWS-2: Small angle scattering diffractometer (NL3ao)

Appears in the scientific report 2019

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Database coverage:
; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF >= 5 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection

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