论文标题
XPCS Nanorheologology揭示的交联胶束网络中的纳米级刚度
Nanoscale Rigidity in Cross-Linked Micelle Networks Revealed by XPCS Nanorheology
论文作者
论文摘要
虫状胶束的溶液可以在微观长度尺度上形成交联网络。这些复杂流体的独特机械性能是由网络结构与动力学之间的相互作用驱动的，网络结构与动力学之间的相互作用是由板板风化计和X射线光子相关光谱频谱〜（XPCS）纳米流变学研究的。记录了分散在胶束溶液中的示踪剂纳米颗粒〜（NP）的强度自动相关函数，该功能捕获了慢慢的结构网络弛豫和被困在网络中的NP的短时动力学。结果表明网络在纳米级上具有共振样动态行为，这是由于单个胶束链的固有短距离刚性而形成的。
Solutions of wormlike micelles can form cross-linked networks on microscopic length scales. The unique mechanical properties of these complex fluids are driven by the interplay between the network structure and dynamics which are investigated by plate-plate rheometry and X-ray photon correlation spectroscopy~(XPCS) nanorheology. Intensity auto-correlation functions of tracer nanoparticles~(NPs) dispersed in micelle solutions were recorded which captured both the slow structural network relaxation and the short-time dynamics of NPs trapped in the network. The results are indicative of a resonance-like dynamic behavior of the network on the nanoscale that develops as a consequence of the intrinsic short-range rigidity of individual micelle chains.
