Universal patterns of equilibrium cluster growth in aqueous sugars observed by dynamic light scattering.
Universal patterns of equilibrium cluster growth in aqueous sugars observed by dynamic light scattering.
复制标题
通过动态光散射观察到水性糖中平衡簇生长的普遍模式。
DOI：
10.1103/physreve.82.051904
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
Tran,TriD
中科院分区：
文献类型：
--
作者：
Sidebottom,DL;Tran,TriD
三种糖（葡萄糖，麦芽糖和蔗糖）的水溶液中进行的动态光散射揭示了一个共同的模式，糖簇形成具有狭窄的集群大小分布。在每种情况下，平衡集群的形式，其大小增加，在一个共同的，临界的，渗滤阈值nearsugar之前，在一个相同的幂律方式增加糖含量。簇大小的幂律发散的临界指数随温度而变化，随着温度的降低而增加，由于分子间氢键的强度的变化，并出现消失的温度超过。详细分析的集群增长过程表明，一个两阶段的过程：在低体积分数的初始集群阶段形成，由非相互作用，单分散糖簇的大小增加，其次是聚集阶段，在浓度高于约，集群集群接触第一次发生。
Dynamic light scattering performed on aqueous solutions of three sugars (glucose, maltose and sucrose) reveal a common pattern of sugar cluster formation with a narrow cluster size distribution. In each case, equilibrium clusters form whose size increases with increasing sugar content in an identical power law manner in advance of a common, critical-like, percolation threshold nearsugar. The critical exponent of the power law divergence of the cluster size varies with temperature, increasing with decreasing temperature, due to changes in the strength of the intermolecular hydrogen bond and appears to vanish for temperatures in excess of. Detailed analysis of the cluster growth process suggests a two-stage process: an initial cluster phase formed at low volume fractions,, consisting of noninteracting, monodisperse sugar clusters whose size increasesfollowed by an aggregation stage, active at concentrations above about, where cluster-cluster contact first occurs.