Schöpe Hans-Joachim, Palberg Thomas
Institut für Physik der Johannes Gutenberg, Universität Mainz, Staudingerweg 7, Mainz, D-55099, Germany
J Colloid Interface Sci. 2001 Feb 1;234(1):149-161. doi: 10.1006/jcis.2000.7258.
We present a new high-precision light-scattering setup to study the properties of colloidal solids. It combines static light scattering, dynamic light scattering, and torsional resonance spectroscopy with a flexible and reliable preparational procedure. All three experiments can be performed quasi-simultaneously on the same mechanically undisturbed sample. Thus, unequivocal identification of glassy behavior in a comprehensive characterization dependent on interaction parameters becomes possible. A detailed description of the mechanics is given. We thoroughly tested the new apparatus on dilute colloidal samples and against commercial reference instruments. We performed a first systematic series of experiments on near index matched charged particles, varying the packing volume fraction between 0.006 and 0.11. The results indicate a new route into the glassy state different from that observed in hard-sphere systems. The range of applications, accuracy, limitations, and possible extensions of the technique are discussed. Copyright 2001 Academic Press.
我们展示了一种用于研究胶体固体性质的新型高精度光散射装置。它将静态光散射、动态光散射和扭转共振光谱与灵活可靠的制备程序相结合。所有这三个实验都可以在同一个机械未受干扰的样品上准同时进行。因此，在依赖相互作用参数的全面表征中明确识别玻璃态行为成为可能。给出了力学的详细描述。我们在稀胶体样品上并与商业参考仪器对比，对新装置进行了全面测试。我们对近折射率匹配的带电粒子进行了首个系统系列实验，将堆积体积分数在0.006至0.11之间变化。结果表明进入玻璃态的一条新途径，不同于在硬球系统中观察到的情况。讨论了该技术的应用范围、准确性、局限性和可能的扩展。版权所有2001年学术出版社。
