Synthesis and Assembly 2D Heterostructured Hybrid Stacks

在化学系大分子、超分子和纳米化学(MSN)计划的支持下，佐治亚理工学院的Vladimir Tsukruk教授和林志群教授将开发新的二维纳米片合成方法，并研究纳米片堆叠的组装和性质。由于金属原子和有机分子物种具有特殊的乐高类交错排列，各层之间的间隙可控，这些2D堆栈可能具有用于能量存储应用的有用的离子传输、电荷存储和界面化学性质，例如可能在轻型电池技术中应用。该研究项目将为研究生和本科生提供跨学科的研究培训，包括来自服务不足群体的学生。将建立一个生活和职业迷你工作坊系列，为研究生和本科生提供机会，交流和学习筑鲁克教授以前的学生和博士后在工业、国家实验室和学术界工作的经验。具体地说，筑鲁克和林实验室的这个合作研究项目将专注于MXenes纳米片材的研究(通式为Mn+1XnTx，其中M是过渡金属，X是碳和/或氮，Tx是表面官能团(例如，OH，O或F)，n=1，2或3)和金属氧化物(V2O5，SnO2和NiO)。研究小组将开发由具有氧化稳定性、间隙控制和组装能力的有组织反应模板支持的MXene/MOX纳米片的合成方法。聚合物和有机物种与无机纳米片的集成可能会导致可控的层间空间，并增加离子的可及性和结构稳定性。本项目的三个主要研究任务包括：1)通过合理设计以功能化纳米片为预编程反应模板的异质二维MX/MOX二元和三元堆栈，合成具有可剪裁表面化学、对称性和尺寸的功能化MXenes；2)组装和制备由有机-无机复合纳米片组成的水平堆栈和垂直排列堆栈；3)利用独特的原位中子反射率和掠角广角X射线散射方法和原位高分辨率扫描探针显微镜实时监测离子传输，以了解界面化学、受限离子传输、离子-壁相互作用和组织-传输关系的基本特征。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

With the support of the Macromolecular, Supramolecular and Nanochemistry (MSN) program in the Division of Chemistry, Professors Vladimir Tsukruk and Zhiqun Lin of Georgia Institute of Technology will develop novel synthetic approaches to two-dimensional nanosheets and study the assembly and properties of the nanosheet stacks. Due to special Lego-like staggering of metal atoms and organic molecular species with controlled gaps between individual layers, these 2D stacks may possess useful ion transport, charge storage, and interfacial chemical properties for energy storage applications as for example might find application in lightweight battery technology. The research project will provide interdisciplinary research training to graduate and undergraduate students, including students from underserved groups. A life and career mini-workshop series will be established to provide opportunities for graduate and undergraduate students to interact with and learn from the experience of Professor Tsukruk’s former students and post-docs working in industry, national laboratories, and academia.Specifically, this collaborative research project by the Tsukruk and Lin laboratories will focus on the study of nanosheets of MXenes (with a general formula of Mn+1XnTx, where M is a transition metal, X is carbon and/or nitrogen, Tx is the surface functional group (e.g., OH, O or F), and n=1, 2 or 3) and metal oxides (V2O5, SnO2 and NiO). The research team will develop synthetic approaches to MXene/MOx nanosheets supported by organized reactive templates with oxidation stability, gap control, and assembly abilities. The integration of polymers and organic species with inorganic nanosheets may result in a controllable interlayer space and increased ion accessibility and structural stability. Three major research task of this project include: 1) synthesis of functionalized MXenes with tailored surface chemistry, symmetry, and dimensions by focusing on the rational design of heterostructured 2D MX/MOx binary and ternary stacks with functionalized nanosheets as pre-programmed reactive templates; 2) assembly and fabrication of both horizontal stacks and vertically aligned stacks composed of organic-inorganic composite nanosheets; and 3) real-time monitoring of ion transport by utilizing unique methods for in-situ neutron reflectivity and grazing-angle wide-angle X-ray scattering with in-situ high-resolution scanning probe microscopy for understanding fundamental characteristics of interfacial chemistry, confined ion transport, ion-walls interactions, and organization-transport relationships.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.