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 1438240NANOMES大小的颗粒通常用作制造具有高级功能和独特特性的材料的构件。为了利用其引人入胜的光学，电子和磁性特性，必须将纳米颗粒组装成所需的结构，以进行特定的技术应用。 大多数纳米颗粒组装的研究都使用球形纳米颗粒，这些纳米颗粒均匀地涂有表面活性剂和/或聚合物。这些颗粒的组装导致具有简单对称性的相。 但是，如果可以将具有不同化学特性的“斑块”引入纳米颗粒的表面，则所得的整体结构可能与可以更好地针对特定应用定制的特性更为复杂。 该项目旨在研究一种合成斑块纳米颗粒的新方法，并探索其用于光学和电子应用的自组装结构。虽然计算机模拟表明可以通过斑块粒子获得广泛的结构，但已经报道了有限的实验工作。 主要原因是缺乏通过受控斑块合成颗粒的实验方法。 新开发的聚合物单晶体 - 晶体模式将用于合成5-100 nm直径的多区域纳米颗粒，并使用自我和可编程组装形成复杂的多班零件集合。 纳米颗粒将具有均匀的中央核心和一个由多区域聚合物刷组成的壳。 可以使聚合物链和相应的纳米颗粒集合的构象可以响应外部刺激，例如pH，温度和/或溶剂。该项目将导致一个新的纳米颗粒结构库，用于基本科学研究和技术应用。