Oda R, Mochrie SG
Center for Material Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts, 02139
J Colloid Interface Sci. 1997 Jun 15;190(2):456-60. doi: 10.1006/jcis.1997.4877.
We have investigated the effect of symmetry on the fluctuation of a three-component lamellar phase composed of oil (octane), water, and a nonionic surfactant (C12E5). The studied lamellae consist of various oil/water volume ratios for a fixed surfactant concentration. From aligned lamellae, we succeeded in obtaining highly reproducible, high-resolution X-ray spectra with very small full width at half maximum (6 x 10(-4) A-1 ). The deviation of the periodicity expected by the dilution law can be explained from the fluctuations. Measuring this deviation, we observed that for the constant surfactant concentration, lamellae with equal oil/water ratios have higher fluctuation than when oil/water --> 0 or infinity because of the difference of the flexibility of monolayers and bilayers
我们研究了对称性对由油（辛烷）、水和非离子表面活性剂（C12E5）组成的三组分层状相波动的影响。所研究的片层在固定表面活性剂浓度下具有不同的油/水体积比。从排列的片层中，我们成功获得了具有非常小的半高宽（6×10⁻⁴ Å⁻¹）的高度可重复的高分辨率X射线光谱。稀释定律预期的周期性偏差可以用波动来解释。通过测量这种偏差，我们观察到，对于恒定的表面活性剂浓度，由于单分子层和双分子层柔韧性的差异，具有相等油/水比的片层比油/水比趋于0或无穷大时具有更高的波动。
