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Self-assembly of gold nanoparticles at the oil-vapor interface: From mono- to multilayers
Publikationstyp
Journal Article
Date Issued
2014-11-11
Sprache
German
TORE-URI
Volume
30
Issue
44
Start Page
13176
End Page
13181
Citation
Langmuir 30 (44): 13176-13181 (2014-11-11)
Publisher DOI
Scopus ID
Alkylthiol-coated gold nanoparticles spontaneously segregate from dispersion in toluene to the toluene-vapor interface. We show that surface tension drops during segregation with a rate that depends on particle concentration. Mono- and multilayers of particles form depending on particle concentration, time, and temperature. X-ray reflectometry indicates fast monolayer formation and slow multilayer formation. A model that combines diffusion-limited segregation driven by surface energy and heterogeneous agglomeration driven by dispersive van der Waals particle interactions is proposed to describe film formation.