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|Title:||Colloidal Solubility and Agglomeration of Apolar Nanoparticles in Different Solvents|
|Title:||Nano letters : a journal dedicated to nanoscience and nanotechnology|
|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:||https://pubs.acs.org/doi/10.1021/acs.nanolett.9b01688|
|Link to this record:||hdl:20.500.11880/27938|
|Date of registration:||27-Sep-2019|
|Faculty:||NT - Naturwissenschaftlich- Technische Fakultät|
|Department:||NT - Chemie|
|Professorship:||NT - Prof. Dr. Tobias Kraus|
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