Routes of Relaxation and Reconfiguration in Soft Matter

软物质的松弛和重构途径

• 批准号: 2003659
• 负责人: Arjun Yodh
• 金额: $ 52.84万
• 依托单位: University of Pennsylvania
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-09-01 至 2024-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2003659&HistoricalAwards=false
• 关键词: Routes; Relaxation; Reconfiguration; Soft; Matter

Nontechnical Abstract:This materials research will unravel new concepts about frustration and reconfiguration of disordered matter that could lead to better control of magnetic materials, to creation of tougher glasses and coatings, and to synthesis of responsive soft materials. Broadly, the experimental project develops new ability to formulate and manipulate micro- and nano-particles and macromolecules in solution. Moreover, the project develops new ways to observe these materials based on cutting-edge optical and computational techniques. The research thus strengthens the science that underlies industries involved with sensing/actuation, microfluidics, drug delivery, photonics, printing, coatings, cosmetics, and agriculture, and thereby positively impacts US technology infrastructure and economy. Finally, this activity will train a new generation of scientists and engineers in the areas of soft materials behavior and formulation, optical microscopy, electro-optics, microfluidics, rheology, and computation. The emerging PhD students and post-docs will enter the nation’s work force, and a diverse group of undergraduate and high school participants will be stimulated to pursue STEM education/career choices as a result of this research activity.Technical Abstract:This experimental project explores fundamental properties of complex fluids and soft materials. Reconfiguration, broadly defined, unifies the research. The research will develop and use sample systems based on colloidal particle suspensions, liquid crystals, and drops to explore the phenomenology of assembly, reconfiguration, response-to-frustration, and relaxation. Importantly, the soft systems offer unique experimental knobs that permit tuning of an energy scale, force parameter, or boundary condition to answer physics questions. The colloid research employs novel particle systems, state-of-the-art video microscopy, and frontier computational analysis tools probe structural relaxation and rearrangement in frustrated colloidal antiferromagnets, colloidal glasses, and colloidal supercooled liquids. The liquid crystal research is oriented towards drops containing liquid crystals. Reconfiguration research, in this case, will develop understanding about the remarkable shape-transitions of drops containing liquid crystal polymers and oligomers. Like the colloidal systems, these behaviors are driven by the delicate balance of interfacial energy, bulk elasticity, and geometry characteristic of soft matter, but they have a new twist: molecular chain polydispersity drives the morphological transformations. Knowledge gained should enable manipulation and crafting of novel routes to assemble complex fluids and will make intellectual connections to patterning effects in living matter that exploit molecular heterogeneity.This Division of Materials Research (DMR) grant supports research to explore fundamental properties of complex fluids and soft materials with funding from the Condensed Matter Physics (CMP) Program in DMR of the Mathematical and Physical Sciences Directorate.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

非技术摘要：这项物质研究将揭示有关无序物质挫败和重新配置的新概念，这些概念可以更好地控制磁性材料，创建更坚固的眼镜和涂层，并综合响应式软材料。从广义上讲，实验项目的发展是新的能力，可以在溶液中制定和操纵微分子和大分子。此外，该项目开发了基于尖端光学和计算技术观察这些材料的新方法。因此，这项研究增强了与敏感性/致动，微流体，药物输送，光子学，印刷，涂料，化妆品和农业有关的行业构成的科学，从而对美国技术基础设施和经济产生了积极影响。最后，这项活动将培训新一代的科学家和工程师在软材料行为和制定，光学显微镜，电气，微流体，流变学和计算领域的领域。新兴的博士生和毕业后的学生将进入美国的劳动力，由于这项研究活动，将刺激一组本科和高中参与者的潜水者，以购买STEM教育/职业选择。技术摘要：该实验项目探索了复杂的流体和软材料的基本特性。重新配置，广泛定义，统一研究。该研究将重要的是基于示例系统的开发和使用，软系统提供了独特的实验旋钮，可以调整能量量表，力参数或边界条件以回答物理问题。胶体研究员工新颖的粒子系统，最先进的视频显微镜和边界计算分析工具工具工具探测挫败的胶体抗fiferromagnets，胶体玻璃和胶体超冷的液体中的结构放松和重排。液晶研究将朝向含有液晶的滴剂。在这种情况下，重新配置研究将对含有液晶聚合物和低聚物的滴剂的显着形状转变发展。像胶体系统一样，这些行为是由界面能量，散装弹性和几何特征的微妙平衡所驱动的，但它们具有新的扭曲：分子链多分散驱动形态转换。 Knowledge gained should enable manipulation and crafting of novel routes to assemble complex flues and will make intellectual connections to patterning effects in living matter that exploit molecular heterogeneity.This Division of Materials Research (DMR) grant supports research to explore fundamental properties of complex flues and soft materials with funding from the Condensed Matter Physics (CMP) Program in DMR of the Mathematical and Physical Sciences Directorate.This award反映了NSF的法定任务，并通过使用基金会的知识分子和更广泛的影响审查标准评估被认为是宝贵的支持。

项目成果

Shear-assisted grain coarsening in colloidal polycrystals

• DOI: 10.1073/pnas.2013456117
• 发表时间: 2020-09-29
• 期刊: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
• 影响因子: 11.1
• 作者: Li, Wei;Peng, Yi;Han, Yilong
• 通讯作者: Han, Yilong

Scaling of relaxation and excess entropy in plastically deformed amorphous solids

• DOI: 10.1073/pnas.2000698117
• 发表时间: 2020-06-02
• 期刊: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
• 影响因子: 11.1
• 作者: Galloway, K. Lawrence;Ma, Xiaoguang;Arratia, Paulo E.
• 通讯作者: Arratia, Paulo E.

Theory of director fluctuations about a hedgehog defect in a nematic drop

关于向列下降中刺猬缺陷的导向波动理论

• DOI: 10.1103/physreve.105.044703
• 发表时间: 2022
• 期刊: Physical Review E
• 影响因子: 2.4
• 作者: Stenull, Olaf;de la Cotte, Alexis;Ettinger, Sophie;Collings, Peter J.;Yodh, A. G.;Lubensky, T. C.
• 通讯作者: Lubensky, T. C.

Relationships between structure, memory and flow in sheared disordered materials

• DOI: 10.1038/s41567-022-01536-9
• 发表时间: 2022-03-17
• 期刊: NATURE PHYSICS
• 影响因子: 19.6
• 作者: Galloway, K. L.;Teich, E. G.;Arratia, P. E.
• 通讯作者: Arratia, P. E.

Rods in a lyotropic chromonic liquid crystal: emergence of chirality, symmetry-breaking alignment, and caged angular diffusion

• DOI: 10.1039/d1sm01209f
• 发表时间: 2021-12-01
• 期刊: SOFT MATTER
• 影响因子: 3.4
• 作者: Ettinger, Sophie;Dietrich, Clarissa F.;Yodh, A. G.
• 通讯作者: Yodh, A. G.