化学掺杂对石墨烯量子点结构及性质的调控研究

项目名称： 化学掺杂对石墨烯量子点结构及性质的调控研究

项目编号： No.51462037

项目类型： 地区科学基金项目

立项/批准年度： 2015

项目学科： 一般工业技术

项目作者： 李学铭

作者单位： 云南师范大学

项目金额： 47万元

中文摘要： 石墨烯量子点（GQDs）由于具有特殊的能级结构、光学性质及电学性质，近年来备受人们关注，然而，目前GQDs的实际应用却受限于对其结构和能级的调制及改变。所以，寻找一种可对GQDs进行光学、电学性质调控的技术就成为解决问题的关键。本项目针对上述现状，拟采用液相化学掺杂技术，以多羟基含碳和含掺杂元素化合物为原料，进行缩水聚合反应，制备一系列不同尺寸、不同元素（Cl、S、B、P及N等）掺杂的GQDs材料，对GQDs的结构和能级进行调制，从而达到改变GQDs的光学和电学性质的目的。本项目将借助TEM、HR-TEM、XPS、AFM、Raman、FT-IR、UV-Vis、PL、Hall、I-V等表征手段，对掺杂后的GQDs进行结构、能级、光学性质、电学性质、光电性质等方面的系统研究，探究不同掺杂元素对GQDs结构及性质的影响规律，揭示不同元素对GQDs能级结构调制的机理，以拓展GQDs材料的应用。

中文关键词： 石墨烯；纳米材料；可控制备；功能材料

英文摘要： Graphene quantum dots(GQDs) have attracted increasing attention in recent years due to the their unique energy structure, optical properties and electrical properties. As a kind of new functional materials, GQDs are very likely to be used in the fields of optoelectronics, biology, photonics and energy. However, the application of GQDs is limited by the modulations on the structure and energy levels of GQDs. Therefore, looking for a practical method to efficiently tune the optical and electrical properties is becoming the key to solve the problem. Due to the above mentioned reasons, by using of solution chemical doping method this proposal will carry out doping experiments of GQDs with a series of doping elements (Cl, S, B, P and N etc.). Various sizes of doped GQDs will be prepared using poly-hydroxyl carbon-containing and poly-hydroxyl doping element-containing compounds as carbon and doping sources respectively after undergoing polymerization dehydration reaction. The tuning on structure and energy levels of GQDs are hopeful by chemical doping to reach the purpose of adjusting the optical and electrical properties. This proposal will systematically study the structure, energy levels, optical properties, electrical properties and photoelectric properties of doped GQDs by using of TEM, HR-TEM, XPS, AFM, Raman, FT-IR, UV-Vis, PL, Hall and I-V characterizations etc. The effect law will be drawn after investigating the doping effects on the structure and properties of GQDs. The mechanism of adjusting energy structures of GQDs by various chemical elements will be revealed to increase the applications of GQDs.

英文关键词： Graphene;Nano Materials;Controllable Preparation;Function Materials