Department of Chemistry, University of Massachusetts at Amherst, 710 North Pleasant Street, Amherst, Massachusetts 01003, USA.
Langmuir. 2012 Jan 31;28(4):2023-7. doi: 10.1021/la204017z. Epub 2011 Dec 22.
Subtle changes in the monolayer structure of nanoparticles (NPs) influence the interfacial behavior of both NPs and NP-protein conjugates. In this study, we use a series of monolayer-protected gold NPs to explore the role of particle hydrophobicity on their dynamic behavior at the toluene-water interface. Using dynamic surface tension measurements, we observed a linear decrease in the meso-equilibrium surface tension (γ) and faster dynamics as the hydrophobicity of the ligands increases. Further modulation of γ is observed for the corresponding NP-protein complexes at the charge-neutralization point.
纳米粒子（NPs）单层结构的细微变化会影响 NPs 和 NP-蛋白缀合物的界面行为。在这项研究中，我们使用一系列单层保护金 NPs 来探索粒子疏水性对其在甲苯-水界面上动态行为的影响。通过动态表面张力测量，我们观察到随着配体疏水性的增加，中平衡表面张力（γ）呈线性下降，动力学更快。在电荷中和点，相应的 NP-蛋白复合物的γ也有进一步的调节。
