Self and Programmable Assembly of Nanoparticles with Multicompartment Polymer Brushes

使用多室聚合物刷进行纳米颗粒的自组装和可编程组装

• 批准号: 1438240
• 负责人: Christopher Li
• 金额: $ 29.87万
• 依托单位: Drexel 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: 2014-09-15 至 2017-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1438240&HistoricalAwards=false
• 关键词: Self; Programmable; Assembly; Nanoparticles; Multicompartment

CBET 1438240Nanometer-sized particles are often used as building blocks to fabricate materials with advanced functionality and unique properties. To take advantage of their fascinating optical, electronic and magnetic properties, nanoparticles must be assembled into desired structures for specific technological applications. Most studies of nanoparticle assembly use spherical nanoparticles that are uniformly coated with surfactants and/or polymers. Assembly of these particles leads to phases with simple symmetries. However, if "patches" with distinct chemical properties can be introduced onto the surfaces of the nanoparticles, the resulting ensemble structures can be much more complex with properties that can be better tailored for specific applications. This project aims to investigate a novel method to synthesize patchy nanoparticles and to explore their self-assembled structures for optical and electronic applications. While computer simulation suggests that a wide range of structures can be obtained by patchy particles, limited experimental work has been reported. The main reason is the lack of experimental approaches to synthesize particles with controlled patches. The newly developed polymer-single-crystal-templating method will be used to synthesize 5-100 nm diameter multicompartment nanoparticles, and to form complex multicompartment ensembles using self- and programmable assembly. The nanoparticles will have a uniform central core and a shell made up of multicompartment polymer brushes. The conformation of the polymer chains and the corresponding nanoparticle ensembles can be made responsive to external stimuli such as pH, temperature and/or solvents. The project will lead to a library of new nanoparticle structures for fundamental scientific study and technological applications.

CBET 1438240纳米尺寸的颗粒通常用作构建块，以制造具有先进功能和独特性能的材料。为了利用其迷人的光学，电子和磁性特性，纳米粒子必须组装成特定技术应用所需的结构。 大多数纳米颗粒组装的研究使用均匀涂覆有表面活性剂和/或聚合物的球形纳米颗粒。这些粒子的组装导致具有简单对称性的相。 然而，如果可以将具有不同化学性质的“补丁”引入到纳米颗粒的表面上，则所得的整体结构可以更加复杂，其性质可以更好地针对特定应用进行定制。 本计画旨在研究一种合成片状奈米粒子的新方法，并探讨其自组装结构在光学与电子学上的应用。虽然计算机模拟表明，通过片状粒子可以获得广泛的结构，但有限的实验工作已经报道。 主要原因是缺乏实验方法来合成具有受控斑块的粒子。 新开发的聚合物单晶模板法将用于合成5-100 nm直径的多室纳米颗粒，并使用自组装和可编程组装形成复杂的多室系综。 纳米颗粒将具有均匀的中心核和由多隔室聚合物刷组成的壳。 聚合物链和相应的纳米颗粒系综的构象可以响应于外部刺激，例如pH、温度和/或溶剂。该项目将为基础科学研究和技术应用建立一个新的纳米颗粒结构库。