当前位置: X-MOL 学术Soft Matter › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Stimuli-responsive granular crystals assembled by dipolar and multipolar interactions
Soft Matter ( IF 3.4 ) Pub Date : 2021-07-29 , DOI: 10.1039/d1sm00887k
Konstantin Polev 1, 2 , Valentin Visyn 1 , Witold Adamkiewicz 1 , Yaroslav Sobolev 1 , Bartosz A Grzybowski 1, 3
Affiliation  

This work describes granular crystals held together by unusual, multipolar interactions and, under the application of an external bias, undergoing reversible structural transitions between closed and open forms. The system comprises two types of polymeric beads agitated on one or between two conductive plates and gradually acquiring charges by contact electrification. The charges thus developed induce a series of electrostatic images in the conductive supports and, in effect, the beads interact via dipolar or multipolar interactions, enabling the stabilization of non-electroneutral crystals. Furthermore, under an applied bias, the beads become polarized and their complex interactions (due to the series of image charges as well as series of image dipoles) result in open-pore crystals which return to compact forms upon bias removal. These effects are rationalized by analytical calculations, and the crystal structures observed in the experiments are reproduced by molecular dynamics simulations.

中文翻译:

通过偶极和多极相互作用组装的刺激响应颗粒晶体

这项工作描述了通过不寻常的多极相互作用结合在一起的粒状晶体,并在外部偏置的应用下,在闭合和开放形式之间经历可逆的结构转变。该系统包括在一个或两个导电板上搅拌并通过接触带电逐渐获取电荷的两种类型的聚合物珠。由此产生的电荷在导电载体中引起一系列静电图像,实际上,珠子通过以下方式相互作用偶极或多极相互作用,使非电中性晶体稳定。此外,在施加的偏压下,珠子变得极化并且它们的复杂相互作用(由于一系列图像电荷以及一系列图像偶极子)导致开孔晶体在去除偏压后恢复为紧凑形式。这些影响通过分析计算得到合理化,实验中观察到的晶体结构通过分子动力学模拟再现。
更新日期:2021-09-16
down
wechat
bug