Collaborative Research: Exploiting Void Symmetries to Control the Self-Assembly of Nanoparticles

合作研究：利用空洞对称性来控制纳米颗粒的自组装

• 批准号: 1403049
• 负责人: Sanat Kumar
• 金额: $ 19.5万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-09-01 至 2017-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1403049&HistoricalAwards=false
• 关键词: Collaborative; Research; Exploiting; Void; Symmetries

PI: Kumar, Sanat / Panagiotopoulos, Athanassios Proposal Number: 1403049 / 1402166 Institution: Columbia University / Princeton University Title: Collaborative Research: Exploiting Void Symmetries to Control the Self-Assembly of Nanoparticles The assembly of nanoparticles (NPs) into colloidal crystals is a promising way to obtain ordered nanocomposite materials with unique properties determined by the choice of the constituent NPs. If successful, this novel approach will have a significant impact on the ability of experimentalists to rationally design ordered colloidal crystals for a wide range of optical and catalytic applications, such as photonic crystals, optical switches and filters, and catalytic devices. The PIs have shown a novel way to selectively stabilize one crystal structure over another possible one by the use of polymers that can intercalate between the NPS. Essentially, the PIs have made an interesting discovery that, even when the energy, pressure, and packing fraction for two isomorphs, e.g., HCP and FCC, are the same, the distribution of voids within the crystals are different. By filling the voids with polymers of different length, they were able to show that one can selectively stabilize HCP over FCC crystals. Based on these findings, they propose to make use of this novel insight about void symmetries and size-distributions to select a desired polymorph from a suite of competing crystal structure. In this proposal, they propose to investigate what design principles are needed to achieve their goal.

PI: Kumar, Sanat / Panagiotopoulos, Athanassios Proposal Number: 1403049 / 1402166 Institution: Columbia University / Princeton University Title: Collaborative Research: Exploiting Void Symmetries to Control the Self-Assembly of Nanoparticles The assembly of nanoparticles (NPs) into colloidal crystals is a promising way to obtain ordered nanocomposite materials with unique properties determined by组成NP的选择。如果成功的话，这种新型方法将对实验者对广泛的光学和催化应用（例如光子晶体，光学开关和过滤器以及催化装置）的合理设计有序胶体晶体的能力产生重大影响。 PI通过使用可以在NP之间插入的聚合物来选择性地稳定在另一种可能的晶体结构上的新型方法。从本质上讲，PI已经做出了一个有趣的发现，即使两个同构的能量，压力和填充分数，例如HCP和FCC，晶体内的空隙的分布也不同。通过用不同长度的聚合物填充空隙，它们能够证明可以在FCC晶体上有选择地稳定HCP。基于这些发现，他们建议利用有关空隙对称性和尺寸分布的这种新颖见解，以从竞争晶体结构套件中选择所需的多晶型物。在此提案中，他们建议研究实现目标所需的设计原则。