期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 132, 期 7, 页码 2122-+出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja9095158
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资金
- Max Planck Society
- Alexander Von Humboldt Foundation
- German Science Foundation [560398]
- European Research Council [240556]
- European Research Council (ERC) [240556] Funding Source: European Research Council (ERC)
Surfactants such as sodium dodecylsulfate (SDS) can reduce the interfacial tension between bulk water and bulk n-hexadecane by 42 mN/m. Although reduction of interfacial tension should also take place on the interface of nanoscopic oil droplets in water, vibrational sum frequency scattering experiments indicate otherwise. In these measurements we have directly measured the adsorption of SDS onto hexadecane oil droplets with an average radius of 83 nm. We find that the interfacial density of adsorbed SDS is at least 1 order of magnitude lower than that at a corresponding planar interface. The derived maximum decrease in interfacial tension is only 5 mN/m.
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