Absence of crystals in the phase behavior of hollow microgels
Absence of crystals in the phase behavior of hollow microgels
复制标题
中空微凝胶的相行为中不存在晶体
DOI：
10.1103/physreve.103.022612
复制
发表时间：
2021
影响因子：
2.4
通讯作者：
Richtering, W.
中科院分区：
文献类型：
--
作者：
Scotti, A.;Denton, A. R.;Brugnoni, M.;Schweins, R.;Richtering, W.
微凝胶溶液已被广泛用作模型系统，以深入了解原子凝聚态物质和复杂流体。我们探索了中空微凝胶的热力学相行为，其与传统胶体的区别在于中心空腔。小角中子和 X 射线散射用于探测拥挤环境中的中空微凝胶。这些测量揭示了消溶胀、互穿和刻面之间的相互作用以及晶体的异常缺失。模型系统的蒙特卡罗模拟证实，由于存在空腔，空心微凝胶溶液比具有交联核心的微凝胶更容易形成过冷液体。
Solutions of microgels have been widely used as model systems to gain insight into atomic condensed matter and complex fluids. We explore the thermodynamic phase behavior of hollow microgels, which are distinguished from conventional colloids by a central cavity. Small-angle neutron and x-ray scattering are used to probe hollow microgels in crowded environments. These measurements reveal an interplay among deswelling, interpenetration, and faceting and an unusual absence of crystals. Monte Carlo simulations of model systems confirm that, due to the cavity, solutions of hollow microgels more readily form a supercooled liquid than for microgels with a cross-linked core.