Department of Chemistry, Gakushuin University, 1-5-1 Mejiro, Toshimaku, Tokyo 171-8588, Japan.
J Phys Chem B. 2012 Jan 26;116(3):935-42. doi: 10.1021/jp209738h. Epub 2012 Jan 12.
Change in the light interference in film samples of isopropylbenzene was studied in the supercooled liquid (SCL) state. Samples were originally formed as glass by vapor deposition on a cold substrate and the intensity of laser light reflection from them was monitored as the temperature was raised with a constant rate up to the region of the SCL state above the glass-transition temperature. Two types of periodic changes in the light intensity were observed in the SCL state. One was attributed to the interference condition change accompanying the structural relaxation from the low-density SCL to the equilibrium SCL state, and the other was due to the gradual expansion of the high-density SCL. Analysis of the latter change revealed that the initial density of the high-density glass was larger than that estimated in our previous paper.
研究了异丙苯薄膜样品在过冷液体（SCL）状态下的光干涉变化。样品最初通过在冷基底上的气相沉积形成玻璃，并且随着温度以恒定速率升高至玻璃化转变温度以上的 SCL 状态区域，监测从它们反射的激光光强度。在 SCL 状态下观察到两种类型的光强度周期性变化。一种归因于伴随结构松弛从低密度 SCL 到平衡 SCL 状态的干涉条件变化，另一种归因于高密度 SCL 的逐渐膨胀。对后者变化的分析表明，高密度玻璃的初始密度大于我们之前论文中估计的值。
