Order-Disorder Phenomena Laboratory, Department of Physics, Worcester Polytechnic Institute, Worcester, 01609, USA.
Department of English, Tezpur University, Tezpur, 784028, India.
Sci Rep. 2020 Nov 3;10(1):18908. doi: 10.1038/s41598-020-76082-6.
Multi-colloidal systems exhibit a variety of structural and functional complexity owing to their ability to interact amongst different components into self-assembled structures. This paper presents experimental confirmations that reveal an interesting sharp phase transition during the drying state and in the dried film as a function of diluting concentrations ranging from 100% (undiluted whole blood) to 12.5% (diluted concentrations). An additional complementary contact angle measurement exhibits a monotonic decrease with a peak as a function of drying. This peak is related to a change in visco-elasticity that decreases with dilution, and disappears at the dilution concentration for the observed phase transition equivalent to 62% (v/v). This unique behavior is clearly commensurate with the optical image statistics and morphological analysis; and it is driven by the decrease in the interactions between various components within this bio-colloid. The implications of these phenomenal systems may address many open-ended questions of complex hierarchical structures.
多胶体系统由于能够在不同成分之间相互作用形成自组装结构，因此表现出多种结构和功能的复杂性。本文通过实验证实，在干燥状态和干燥膜中存在有趣的相转变，稀释浓度范围从 100%（未稀释的全血）到 12.5%（稀释浓度）。此外，补充接触角测量表明，随着干燥的进行，接触角单调减小并出现峰值。这个峰值与粘弹性的变化有关，随着稀释而减小，并在观察到的相转变浓度下消失，相当于 62%（体积/体积）。这种独特的行为与光学图像统计和形态分析明显一致，并且是由生物胶体中各种成分之间相互作用的减少驱动的。这些现象系统的意义可能解决许多复杂层次结构的开放性问题。
