GeH单层膜的研究与制备

发布时间：2018-04-30 19:18

  本文选题：石墨烯 + GeH　； 参考：《黑龙江大学》2015年硕士论文

【摘要】：石墨烯(Graphene)的制备与应用已经表明,从三维晶体中剥离稳定的、单原子层厚的二维材料不仅是可行的,而且这些材料与原三维体材料相比可能具有完全不同的性质。由于Graphene的sp2杂化状态,改变其表面化学状态是非常具有挑战性的,这使得其应用受到限制。在碳的同族元素中(Si和Ge),可能存在结构上类似于石墨烯的层状材料并是sp3杂化状态,这使得表面化学状态的改变成为可能。这种表面化学状态的调节,可能会实现光电子学应用中所必需的可调带隙。GeH(GeH)是一种类似于Graphene的二维材料,由于其优越的特性,已经成为了新的研究热点。GeH是Ge的一种衍生物,可以通过CaGe2合金与浓盐酸反应制备,而CaGe2可以使用Ge与Ca高温反应制备。本论文首先研究了不同的反应物配比、不同温度对CaGe2合金制备的影响。XRD测试结果表明,使用物质的量配比为Ca:Ge=1:2、在高温下(~1000℃)可制备出较纯的CaGe2。使用制备出的CaGe2与浓盐酸在低温下反应制备出了GeH。使用光学显微镜、X射线衍射(XRD)、拉曼、红外光谱(FTIR)、X射线光电子能谱(XPS)等方法对其性质进行了表征。最后通过机械剥离的方法,制备出了数层以及单层的GeH薄膜。综上所述,本论文对GeH二维材料的制备与表征进行了系统的研究,对于GeH的制备及应用有很强的指导意义。
[Abstract]:The preparation and application of graphene (Graphene) have shown that it is not only feasible to peel stable, monatomic layer thick two-dimensional materials from three-dimensional crystals, but also that these materials may have completely different properties compared with the original three-dimensional bulk materials. Because of the sp2 hybrid state of Graphene, it is very challenging to change its surface chemical state, which limits its application. In the same group of carbon elements, Si and Geo may have layered materials similar to graphene in structure and are in sp3 hybrid state, which makes it possible to change the chemical state of the surface. The regulation of the surface chemical state may realize that the tunable band gap. GeHU GeH is a kind of two-dimensional material similar to Graphene, which has become a new research hotspot. GeH is a derivative of GE. CaGe2 alloy can be prepared by reaction with concentrated hydrochloric acid, while CaGe2 can be prepared by high temperature reaction of GE and Ca. In this paper, the effects of different reactants and different temperature on the preparation of CaGe2 alloy were studied. The results showed that the pure CaGe2 could be prepared by using the mass ratio of Ca: Ge-1: 2 at 1000 鈩，

本文编号：1825838