Please use this identifier to cite or link to this item: doi:10.22028/D291-28995
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Title: Colloidal Solubility and Agglomeration of Apolar Nanoparticles in Different Solvents
Author(s): Doblas, David
Kister, Thomas
Cano-Bonilla, Marina
González-García, Lola
Kraus, Tobias
Language: English
Title: Nano letters : a journal dedicated to nanoscience and nanotechnology
Volume: 19
Issue: 8
Startpage: 5246
Endpage: 5252
Publisher/Platform: ACS
Year of Publication: 2019
Publikation type: Journal Article
Abstract: We studied the concentration-dependent agglomeration of apolar nanoparticles in different solvents. Octanethiol-stabilized gold nanoparticles (AuNPs) in evaporating liquid droplets were observed in situ using small-angle X-ray scattering. Concurrent analysis of liquid volume and particle agglomeration provided time-dependent absolute concentrations of free and agglomerated particles. All dispersions underwent an initial stage where the particle concentration increased but no agglomerates formed. Subsequently, agglomeration started at concentrations that varied by several orders of magnitude for different solvents. While agglomerates grew, the concentration of the dispersed particles remained at a constant "colloidal solubility" in most solvents. We consistently found that the colloidal stability of AuNPs decreased as cyclohexane > heptane > nonane > decane > toluene and suggest that details of the molecular interactions between solvent and ligand shell set this order.
DOI of the first publication: 10.1021/acs.nanolett.9b01688
URL of the first publication:
Link to this record: hdl:20.500.11880/27938
ISSN: 1530-6984
Date of registration: 27-Sep-2019
Faculty: NT - Naturwissenschaftlich- Technische Fakultät
Department: NT - Chemie
Professorship: NT - Prof. Dr. Tobias Kraus
Collections:Die Universitätsbibliographie

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