CEA, IRAMIS, LIONS, Gif-sur-Yvette Cedex, France.
Langmuir. 2010 Feb 2;26(3):1642-8. doi: 10.1021/la9025238.
Nanometer-sized gold nanoparticles have been prepared and surface-modified in order to stabilize alkane-in-water emulsions. A mixed hexane-undecanol ligand layer at the surface of the nanoparticles allowed us to tune their wettability and thus the adsorption at the oil-water interface. Oil droplets of the stable emulsions have been evidenced by confocal fluorescence microscopy, freeze-fracture transmission electron microscopy, and dynamic light scattering. Prepared emulsions were stable during performed cooling-heating cycles, in which the temperature stability of the emulsions has been studied by means of dynamic light scattering. The interfacial structure of the oil droplets was investigated by small-angle X-ray scattering. The obtained area per nanoparticle at the oil droplet interface was 30 nm(2). The investigation of the nanoparticle adsorption at the curved interface of the emulsion droplets is in agreement with our previous study at a planar oil-water interface, in which the nanoparticles started to interact with each other at about the same area per particle.
为了稳定烷烃在水中的乳液，制备并表面修饰了纳米级金纳米粒子。纳米粒子表面的混合十六烷-十一醇配体层允许我们调整其润湿性，从而调整在油水界面的吸附。通过共焦荧光显微镜、冷冻断裂透射电子显微镜和动态光散射证实了稳定乳液中的油滴。制备的乳液在进行的冷却-加热循环中保持稳定，通过动态光散射研究了乳液的温度稳定性。通过小角 X 射线散射研究了油滴的界面结构。在油滴界面处获得的每个纳米粒子的面积为 30nm²。对乳液液滴弯曲界面处纳米粒子吸附的研究与我们之前在平面油水界面上的研究一致，在该研究中，每个粒子的面积约为相同，纳米粒子开始相互作用。
