Functional Carbon Nano-skins: Integrating Nanostructured Oxides with Molecular Systems

功能性碳纳米皮：纳米结构氧化物与分子系统的集成

• 批准号: 1310293
• 负责人: Robert Hamers
• 金额: $ 40万
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-09-01 至 2016-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1310293&HistoricalAwards=false
• 关键词: Functional; Carbon; Nano; skins; Integrating

In this project, funded by the Macromolecular, Supramolecular, and Nanochemistry Program of the Chemistry Division, Prof. Robert Hamers of the University of Wisconsin-Madison and his students will integrate polymer chemistry with surface chemistry to make ultra-stable interfaces between metal oxide nanoparticles and molecular systems such as molecular photocatalysts and light-harvesting molecules. They will explore the synthesis and properties of functional "nano-skins" created on surfaces, using metal oxides such as TiO2 as model systems. In order to form robust layers, molecules bearing multiple reactive groups will be grafted to TiO2 surfaces; these will then be cross-linked to form two-dimensional surface nets in which each surface oligomer has many linkages to the surface. Electrochemically active species will then be linked to the net to form functional layers with novel electrochemical and photoelectrochemical properties. Fundamental properties such as electron transfer rates will be measured using surface-attached ferrocene groups. A variety of experimental measurements will be performed to characterize the chemical and physical properties of the layers in order to establish whether extensive lateral cross-linking within nanometer-thick molecular layers can lead to highly stable interfaces with novel electrochemical and photoelectrochemical properties. This project will provide graduate students, undergraduate students, and junior scientists with state-of-the-art training in the techniques of surface chemistry and other career skills necessary to become scientific leaders. Students will learn techniques of chemical synthesis, characterization of surfaces, and a variety of electrochemical and photoelectrochemical measurement techniques. They will also receive training in oral and written communication, ethics, and leadership. The research will provide important fundamental insights into charge-transfer processes within and through molecular layers at surfaces and will help to establish design rules for how to fabricate highly stable interfaces between inorganic materials and organic-based molecular structures. Inorganic-organic hybrid structures are of great interest in a range of existing and emerging commercial technologies, and the ability to make water-stable interfaces between molecules and metal oxides such as TiO2 would have both commercial and societal impact in areas such as renewable energy. The project will also impact society by providing opportunities for educational and outreach activities with a diversity of outside groups.

在这个由化学系高分子、超分子和纳米化学计划资助的项目中，威斯康星大学麦迪逊分校的罗伯特·哈默斯教授和他的学生将把聚合物化学与表面化学结合起来，在金属氧化物纳米颗粒与分子体系(如分子光催化剂和捕光分子)之间建立超稳定的界面。他们将以二氧化钛等金属氧化物为模型体系，探索在表面创造的功能性“纳米皮肤”的合成和性质。为了形成坚固的层，含有多个活性基团的分子将被嫁接到二氧化钛表面；然后这些分子将被交联以形成二维表面网络，其中每个表面低聚物都与表面有许多连接。然后，将具有电化学活性的物种连接到网络上，形成具有新颖的电化学和光电化学性能的功能层。基本性质，如电子转移速率，将使用表面附着的二茂铁基团来测量。将进行各种实验测量来表征这些层的化学和物理性质，以确定在纳米厚的分子层内广泛的横向交联是否可以导致具有新的电化学和光电化学性质的高度稳定的界面。该项目将为研究生、本科生和初级科学家提供最先进的表面化学技术培训和成为科学领导者所需的其他职业技能。学生将学习化学合成技术、表面表征以及各种电化学和光电化学测量技术。他们还将接受口头和书面沟通、道德和领导力方面的培训。这项研究将为研究表面分子层内和通过分子层的电荷转移过程提供重要的基础性见解，并将有助于建立如何在无机材料和有机基分子结构之间建立高度稳定的界面的设计规则。无机-有机杂化结构在一系列现有的和新兴的商业技术中引起了极大的兴趣，在可再生能源等领域，分子和金属氧化物(如二氧化钛)之间形成水稳定界面的能力将产生商业和社会影响。该项目还将通过向各种外部群体提供教育和外联活动的机会，对社会产生影响。