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Collaborative Research: The Self-Assembly of Multicomponent Nanostructures

合作研究：多组分纳米结构的自组装

基本信息

批准号：
1708390
负责人：
Jon Parquette
金额：
$ 47.5万
依托单位：
Ohio State University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2017
资助国家：
美国
起止时间：
2017-09-01 至 2020-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1708390&HistoricalAwards=false
关键词：
Collaborative Research Self Assembly Multicomponent

项目摘要

Many of the remarkable features seen in nature, ranging from the strength of spider silk to the light-harvesting ability of plant leaves, arises from sophisticated, multicomponent architectures. These biological nanostructures are comprised of multiple, discrete components that are assembled with nanoscale (one billionth of a meter scale) precision into a highly integrated functional system. Self-assembly offers a convenient, albeit often trial and error-based strategy, to make single-component, synthetic materials in the nanoscale regime. However, these systems rarely exhibit the high level of performance seen in natural systems due to the difficulties in reliably designing self-assembling systems composed of multiple, precisely positioned components. To address this challenge and progress toward higher levels of functional performance, Professors Parquette of The Ohio State University and Modarelli of The University of Akron, are developing strategies to self-assemble multiple, discrete building blocks into multicomponent architectures to serve as optoelectronic materials for solar energy conversion. Creating reliable strategies to create non-covalent architectures that rival the sophisticated systems in biology may enable new technologies capable of addressing societal problems in areas such as renewable energy, greenhouse gas conversion, and medicine. Additionally, this project is used as a platform to enhance public awareness of the potential role that science plays in addressing these issues. The research team continues to present science exhibitions at the Columbus Center of Science and Industry (COSI) to allow younger students to experience the hands-on excitement of scientific discovery. Also, the investigators use Ohio State's REEL program to offer opportunities for large numbers of undergraduate students to perform nanotechnology research in a teaching laboratory environment in addition to providing opportunities for undergraduates in the research laboratory. Professors Parquette and Modarelli provide research experiences to minority students in the area of nanotechnology through the NSF HBCU-RISE program and through the SROP (Summer Research Opportunities Program) at OSU.The Macromolecular, Supramolecular and Nanochemistry Program of the Chemistry Division supports the work of Professors Parquette and Modarelli, which aims to develop a versatile strategy to assemble multiple optoelectronic components into self-sorted domains that are integrated within a single nanostructure. This approach creates composite nanostructures using a sequential layer-by-layer strategy to organize pre-assembled systems into one architecture. The morphology, dimensions, and positional arrangement of the components are correlated with the corresponding photophysical properties, measured using ultrafast spectroscopic techniques. The research activities include: (1) the co-assembly of nanotube-polymer composites displaying a coaxial, bicontinuous array of conjugated polymers that establish a redox cascade; (2) the co-assembly of discrete, monomeric building blocks into composite structures comprised of separate, self-assembled nanostructures; (3) measurement of the photophysical properties of the assemblies via ensemble and single-molecule femtosecond spectroscopy; and (4) to measure photo-electrochemical coupling of aligned nanotube co-assemblies via surface-tracked scanning electrochemical microscopy (ST-SECM).This project integrates fundamental research with outreach and communication efforts to engage a diverse group of students in interdisciplinary science, and the community at large, to show how nanotechnology impacts their lives.

自然界中许多显著的特征，从蜘蛛丝的强度到植物叶子的光收集能力，都源于复杂的、多组分的结构。这些生物纳米结构由多个离散的组件组成，这些组件以纳米级（十亿分之一米）的精度组装成一个高度集成的功能系统。自组装提供了一种方便的方法，尽管通常是基于试验和错误的策略，以制造纳米级的单组分合成材料。然而，由于难以可靠地设计由多个精确定位组件组成的自组装系统，这些系统很少表现出自然系统中所见的高水平性能。为了应对这一挑战并朝着更高水平的功能性能迈进，俄亥俄州立大学的Parquette教授和阿克伦大学的Modarelli教授正在开发一种策略，将多个离散的构建模块自组装成多组件架构，作为太阳能转换的光电材料。创建可靠的策略来创建非共价架构，以与生物学中的复杂系统相媲美，可能会使新技术能够解决诸如可再生能源、温室气体转换和医学等领域的社会问题。此外，该项目还被用作一个平台，以提高公众对科学在解决这些问题方面所发挥的潜在作用的认识。研究小组继续在哥伦布科学与工业中心（COSI）举办科学展览，让年轻的学生体验科学发现的亲身体验。此外，研究人员利用俄亥俄州立大学的REEL项目为大量本科生提供了在教学实验室环境中进行纳米技术研究的机会，此外还为本科生提供了在研究实验室进行纳米技术研究的机会。Parquette教授和Modarelli教授通过NSF HBCU-RISE项目和俄勒冈州立大学的SROP（夏季研究机会项目）为纳米技术领域的少数民族学生提供研究经验。化学部的大分子、超分子和纳米化学项目支持Parquette教授和Modarelli教授的工作，他们的目标是开发一种多用途的策略，将多个光电元件组装成一个集成在单个纳米结构中的自分类域。这种方法使用顺序的逐层策略将预组装的系统组织到一个体系结构中，从而创建复合纳米结构。组分的形态、尺寸和位置排列与相应的光物理性质相关，使用超快光谱技术测量。研究活动包括：(1)纳米管-聚合物复合材料的共组装，展示了一个同轴的、双连续的共轭聚合物阵列，建立了一个氧化还原级联；(2)将离散的单体构建块共同组装成由独立的自组装纳米结构组成的复合结构；(3)通过系综和单分子飞秒光谱测量了组装体的光物理性质；(4)通过表面跟踪扫描电化学显微镜（ST-SECM）测量排列纳米管共组件的光电耦合。该项目将基础研究与外展和交流工作结合起来，吸引跨学科科学的不同学生群体和整个社区，展示纳米技术如何影响他们的生活。