Impact of the Crosslinker’s Molecular Structure on the Aggregation of Gold Nanoparticles-Reference-Cited by-同舟云学术

Impact of the Crosslinker’s Molecular Structure on the Aggregation of Gold Nanoparticles

Published:2016-11-03 Issue:1 Volume:231 Page:19-31
ISSN:2196-7156
Container-title:Zeitschrift für Physikalische Chemie
language:en
Short-container-title:

Author:

Deffner Michael¹,Schulz Florian²,Lange Holger²

Affiliation:

1. Institute of Applied and Analytic Chemistry, Department of Chemistry, University of Hamburg, Hamburg, Germany

2. Institute of Physical Chemistry, Department of Chemistry, University of Hamburg and the Hamburg, Centre for Ultrafast Imaging (CUI), Hamburg, Germany

Abstract

Abstract We studied the aggregation of AuNP induced by small aromatic molecules under different conditions. In water, the aggregation was found to be difficult to control. Phase transfer of the particles into toluene by using oleylamine as a ligand allows for a more controlled and reliable synthesis. Using nonane-1,9-dithiol as a control, our experiments demonstrate that the molecular structure of the linker has a decisive influence on the aggregation. Aromatic dithiols yielded spherical aggregates in the range of 100 nm, whereas the aliphatic linker produced large aggregates in the µm range. The length of the aromatic linker (2 vs. 3 phenylene units) strongly affected aggregation kinetics and the structure of the produced aggregates. With UV/Vis and DLS based experiments it was possible to distinguish the process of ligand layer formation and aggregation. Our results will help to develop syntheses of defined spherical aggregates and possibly more complex structures.

Publisher

Walter de Gruyter GmbH

Subject

Physical and Theoretical Chemistry

Link

https://www.degruyter.com/document/doi/10.1515/zpch-2016-0865/pdf

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