碳-铁原子聚集体固溶“焊接”石墨烯

项目名称： 碳-铁原子聚集体固溶“焊接”石墨烯

项目编号： No.51502320

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 一般工业技术

项目作者： 王聪伟

作者单位： 中国科学院山西煤炭化学研究所

项目金额： 20万元

中文摘要： 石墨烯二维界面连接,是将其优异微观理化性能贯穿延伸至宏观薄膜态过程中面临的核心挑战。申请人在已有对石墨烯界面结构与宏观力学性能的研究基础上，提出并寻证假说：在准二维尺度上，铁原子聚集体（纳米颗粒、单层原子、团簇）与石墨烯的合金固溶体键合态(“焊接”)，是桥接石墨烯微片、保留优异低维性能的一种较理想界面结构。本研究拟采用液相自组装、等离子体或热处理线路制备石墨烯-铁连接态，调控石墨烯表面官能团、铁的前驱物和制备方法，优化连接点界面微观结构，以宏观和微观薄膜力学、传导和光学等性能为评价体系，寻求铁-碳键合类型证据并阐明接触界面在“焊接”前后键合结构变化。比较研究其它界面结合方式，建立微观界面结构与宏观性能间的构效关系，验证“焊接”键合结构是理想的低维“面-点”界面形态这一关键科学问题。碳和铁都是人类友好元素，本课题将铁-碳固溶体与相图理论引至原子晶体层次，为石墨烯功能薄膜和钢铁研发提供新思路。

中文关键词： 石墨烯；铁原子层；掺杂石墨烯；界面连接态；固溶体

英文摘要： The optimized interfacial connection of graphene (G) sheets is the key challenges of extending the unique intrinsic properties of nanoscale G sheets to macroscopic G films. Based on applicant’s previous research on the relationship between interfacial structure and the resultant mechanical behaviour of G based materials, a hypothesis is proposed that: in qusi-2D scale, the alloying solid solution interface bonding (“soldering”) between G sheets and the assemblies of iron atoms (AoFe: nanoparticles, 2D atomic layer and tiny clusters) is an favoured interfacial mode to bridge G sheets and retain the extraordinary properties of G sheets. This project is proposed to adopt the approaches of liquid-phase self-assembly, plasma and heat treatment to make G- AoFe interfacial connections; varying the G surface functional groups, the precursor of iron atoms and fabrication methods to optimize the interfacial microstructures and evaluate the mechanical, conductive and optical properties in both microscopic and macroscopic scales. Seeking the proof of potential connection modes between G and AoFe and revealing the “soldering” effects on the atomic structure changes. Comparing the other interfacial bonding modes, establish the relationship between microscopic interfacial structure and macroscopic properties and validate the “soldering” connection mode is a preferred low dimensional “surface-point” interfacial structure, which is our project’s main scientific focus. Carbon and iron are human friendly elements, introducing the iron-carbon solid solution theory and phase diagram into atomic scale, the project will provide new pathway on developing new G based functional films and extend our vision on traditional steel.

英文关键词： graphene;iron atomic layers;graphene doping ;interface connection;solid solution