原子精度可控石墨烯纳米结构合成机理及应用研究

项目名称： 原子精度可控石墨烯纳米结构合成机理及应用研究

项目编号： No.51272296

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 一般工业技术

项目作者： 罗正汤

作者单位： 重庆大学

项目金额： 78万元

中文摘要： 石墨烯本身没有能带隙(bandgap)，因而在电子技术领域的应用受到限制。本研究计划通过引进先行高分子聚合中的"终止单体"概念，利用1,2-azaborine的类单官能团单体结构，利用其作为石墨烯合成的分子量调节剂，从而可控的合成特定大小、边界结构的石墨烯结构。这种结构的石墨烯可以通过量子限域（quantum confinement）和/或边界效应 （edge effect）的办法产生能带隙。同时，我们将探讨催化金属的微观结构特征、合成温度、反应时间、反应单体种类及浓度、表面处理方法等对石墨烯合成的影响，理清控制单层石墨烯片的边界关键因素。最终建立起实验参数与石墨烯合成动力学、热力学关系，阐明合成不同边界结构的石墨烯的途径，并验证申请人提出的"二维自由基聚合"理论。

中文关键词： 石墨烯；层数控制；纳米结构化；生长机理；构效关系

英文摘要： Pristine graphene has no banggap, henceforth bottle-necked their applications in semiconductor industry. We propose to introduce the "stopper monomer" concept, which is widely used in polymerization, into the graphene growth via chemical vapor deposition (CVD), where stopper monomer analog 1,2-azaborine will be used as molecular weight regulator to control the dimension and edge structures of graphenes with atomic resolution. Graphene nanostructures obtained with these methods will have a sizable bandgap due to quantum confinement effect and/or edge effect. Our goals also include the scientific exploration of effects from factors such as catalytic metal morphology, growth temperature, growth time, type of the carbon sources and their concentrations, and finally to clarify critical factors governing graphene edge formation. The long-term objective of the project is to build the correlation between the dominant factors and the chemical kinetics, thermodynamics, therefore to exploit methods to obtain a library of edge structures, and consequently to validate the proposed "two dimensional free radical polymerization" theory.

英文关键词： Graphene；Thickness Control；Nano Structure；Growth Mechanism；Structure-Performance Law