NSTI Nanotech 2009

Effect of size of the nanoparticle,bulk concentration and ligand length on the adsoprption behaviour at the hexane-water interfaces.

S. Ferdous, M. Ioannidis, D. Henneke
University of Waterloo, CA

Keywords: Dynamic interfacial tension, Size, Bulk concentration, Capping agent


The pendant drop technique was used to characterize the adsorption behavior of n-dodecane-1-thiol and n-hexane-1-thiol stabilized gold nanoparticles at the hexane-water interface. While performing these experiments, two factors were taken into consideration: (1) the concentration of nanoparticles, and (2) nanoparticle size. Two kinds of ligand stabilized gold nanoparticles were used to investigate the effect of ligand chain length on the adsorption behavior at the interface. The characteristics of the adsorption process were obtained by analysis of dynamic interfacial tension data as a function of particle concentrations in the bulk. It was found that the nanoparticle size, particle concentration and nature of the capping agent all have a profound impact on the interfacial properties.
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