渗透(认知心理学)
聚合物
材料科学
同种类的
纳米
斑点图案
渗流阈值
化学物理
渗流理论
纳米技术
化学工程
复合材料
统计物理学
光学
化学
物理
物理化学
工程类
电导率
生物
神经科学
电阻率和电导率
量子力学
作者
Xiang Li,Seiko Nakagawa,Yui Tsuji,Nobuyuki Watanabe,Mitsuhiro Shibayama
出处
期刊:Science Advances
[American Association for the Advancement of Science (AAAS)]
日期:2019-12-06
卷期号:5 (12)
被引量:69
标识
DOI:10.1126/sciadv.aax8647
摘要
Gels are a soft elastic material consisting of a three-dimensional polymer network with nanometer-sized pores and are used in a variety of applications. However, gel networks typically have a substantial level of defects because the network formation reaction proceeds stochastically. In this study, we present a general scheme to fabricate gels with extremely low levels of defects by applying geometric constraints into pregel solution based on the "bond percolation" concept. In the formed gel, stationary laser speckles, which are an indicator of spatial defects, were not observed at all. In addition, we found that the concentration fluctuations of the polymer chains were ergodic across the whole gel network. In such a homogeneous gel, both the spatial and temporal correlations of polymer chains are the same before and after gelation.
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