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Mechanics of Colloidal Membranes

胶体膜力学

基本信息

批准号：
1634552
负责人：
Thomas Powers
金额：
$ 37.69万
依托单位：
Brown University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2016
资助国家：
美国
起止时间：
2016-09-01 至 2020-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1634552&HistoricalAwards=false
关键词：
Mechanics Colloidal Membranes

项目摘要

The goal of this project is to study the mechanics of colloidal membranes---membranes comprised of colloidal particles such as filamentous viruses or DNA origami bundles. These membranes have life-like abilities reminiscent of cell membranes, such as the ability to heal themselves or assemble spontaneously into complex and controllable shapes. Many of the technological advances of the twentieth century were made possible by discoveries in materials engineering. The development of corrosion-resistant stainless steel, synthetic polymers such as nylon, semiconductors and integrated circuits, and liquid crystals used in displays have all had a profound impact on society and our quality of life. Each of these advances required the theoretical framework and experimental techniques necessary to understand and control the material properties of inanimate matter. Today we are at the beginning of a new era of bio-inspired materials engineering, as it is now just becoming possible to create and control materials consisting of biological components and with the distinctive properties of living matter. The PIs will develop the theoretical and computational tools to predict and control the mechanics of colloidal membranes and how colloidal membrane shape depends on the experimental conditions. The research approach has the potential to bridge the physics, math and engineering communities. Educational YouTube videos related to the research will also be created for outreach to the public.Colloidal membranes are promising for their potential as highly reconfigurable microscopic structures, and as analogs to biological materials such as lipid bilayer membranes. While colloidal membranes share many properties with lipid bilayer membranes, such as their fluidity, they also have their own unique aspects, including a low energy cost for having edges. The study of the mechanics of these objects is still in its infancy, and requires a multidisciplinary approach including elements from solid mechanics, statistical mechanics, liquid crystal physics, and differential geometry. The research team will carry out three specific tasks: (i) calculate the entropy-driven or chirality-driven instability and subsequent nonlinear evolution of flat disk-shaped membranes to rippled helical sheets and twisted ribbons, (ii) calculate the force vs. extension relation for membrane disks and helicoidal ribbons, and (iii) predict and classify the shapes of colloidal membranes of more complex topology, such as catenoids and other observed structures with multiple holes.

这个项目的目标是研究胶体膜的力学-由胶体颗粒组成的膜，如丝状病毒或DNA折纸束。这些膜具有类似于细胞膜的生命能力，例如自我修复或自发组装成复杂和可控形状的能力。世纪的许多技术进步都是由于材料工程的发现而成为可能的。耐腐蚀不锈钢、尼龙等合成聚合物、半导体和集成电路以及显示器中使用的液晶的发展都对社会和我们的生活质量产生了深远的影响。每一项进步都需要理论框架和实验技术来理解和控制无生命物质的物质特性。今天，我们正处于一个生物启发材料工程的新时代的开始，因为现在才有可能创造和控制由生物成分组成的材料，并具有生物物质的独特特性。PI将开发理论和计算工具来预测和控制胶体膜的力学以及胶体膜形状如何取决于实验条件。研究方法有可能弥合物理，数学和工程社区。此外，还将制作与该研究相关的教育性YouTube视频，以向公众宣传。胶体膜具有高度可重构的微观结构和类似于脂质双层膜等生物材料的潜力。虽然胶体膜与脂质双层膜共享许多特性，例如它们的流动性，但它们也有自己独特的方面，包括具有边缘的低能量成本。这些物体的力学研究仍处于起步阶段，需要多学科的方法，包括固体力学，统计力学，液晶物理和微分几何的元素。调研组将开展三项具体工作：（i）计算熵驱动或手性驱动的不稳定性以及随后的平坦盘形膜到波纹螺旋片和扭曲带的非线性演化，（ii）计算膜盘和螺旋带的力与延伸的关系，以及（iii）预测和分类更复杂拓扑的胶体膜的形状，例如悬链和其它观察到的具有多个孔的结构。

项目成果

期刊论文数量（5）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Shapes of fluid membranes with chiral edges

具有手性边缘的流体膜的形状

DOI：
10.1103/physreve.102.032608
发表时间：
2020
期刊：
Physical Review E
影响因子：
2.4
作者：
Ding, Lijie;Pelcovits, Robert A.;Powers, Thomas R.
通讯作者：
Powers, Thomas R.

Achiral symmetry breaking and positive Gaussian modulus lead to scalloped colloidal membranes

DOI：
10.1073/pnas.1617043114
发表时间：
2017-04-25
期刊：
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
影响因子：
11.1
作者：
Gibaud, Thomas;Kaplan, C. Nadir;Dogic, Zvonimir
通讯作者：
Dogic, Zvonimir

Deformation and orientational order of chiral membranes with free edges

具有自由边缘的手性膜的变形和取向顺序