基于新型二维材料的微纳米传感器传感机理研究

发布时间：2018-01-13 12:53

本文关键词：基于新型二维材料的微纳米传感器传感机理研究　出处：《桂林电子科技大学》2017年硕士论文　论文类型：学位论文

【摘要】：自2004年石墨烯被发现以来,二维材料已经成为一个新的研究热点。由于二维材料优异的物理与化学特性,因此二维材料在传感器上的应用极具潜力。但现有各类二维材料各项特性并非完美,因此,二维材料研究领域一直在探寻一种各项性能优异、易于制造的新型材料,并将其用于电子器件和传感器领域。本论文主要利用第一性原理计算的方法来研究二维材料的电学特性和光学特性并分析其潜在传感机理,为其未来传感应用打下理论基础。论文的内容具体安排如下:首先,通过范德华修正的密度泛函理论计算,证明了通过杂核双氢键和外加电场能够有效的调控石墨烷/全氢化六方氮化硼(G/fHBN)异质结的电学特性和功函数。在施加不同方向的外加电场时,G/fHBN异质结出现了明显的绝缘体-半导体-金属特性的转变,表现出单向导电性,功函数值较低且对外加电场十分敏感。接着,计算了G/fHBN异质结的载流子迁移率。其次,鉴于杂核双氢键在异质结性质调控中的巨大作用,紧接着探究了双氢键对石墨烷/硅烷和全氢化六方氮化硼/硅烷异质结稳定性、电学性质和光学性质的影响。研究了外加电场对异质结稳定性和电学性质的影响,并计算了其载流子迁移率。最后,对石墨烯/氧化铝(G/A)双层结构的结构和性质进行了研究,分析了其电学特性,并且探究了掺杂对石墨烯/氧化铝双层结构电学特性的影响。
[Abstract]:Since 2004, graphene was discovered, the two-dimensional material has become a new research hotspot. The physical and chemical properties of two-dimensional materials with excellent, so a potential application of two-dimensional materials in sensors. But the existing types of two-dimensional material properties is not perfect, therefore, research in the field of two-dimensional material has been exploring an excellent performance, easy manufacture of new materials, which are used for electronic devices and sensors. The electrical and optical characteristics of this method is calculated using the first principle to study the two-dimensional materials and analysis the potential sensing mechanism, sensing applications for its future lay a theoretical foundation. The main contents of this paper are as follows: first, through the density functional theory Fan Dehua correction calculation, proved by heteronuclear double hydrogen bonding and external electric field can effectively control graphane / perhydrogenated six nitride Boron (G/fHBN) electrical characteristics and the work function of the heterojunction. In the electric field applied in different directions, G/fHBN heterojunction changed obviously metal insulator semiconductor properties, showing a single conductivity, lower work function values and the external electric field is very sensitive. Then, the carrier of G/fHBN heterojunction the migration rate was calculated. Secondly, in view of the miscellaneous nuclear double hydrogen bonding properties in the regulation of great role in heterogeneous, then explores the double hydrogen bond on the graphite / alkyl silane and perhydrogenated six boron nitride / silane heterojunction effect stability and optical properties. The influence of the electric field stability and electrical properties the heterogeneous, its carrier mobility is calculated. Finally, the graphene / alumina (G/A) structure and properties of bilayer structure is studied, analyzed its electrical characteristics, and explore the doping of graphene / alumina double The influence of the electrical characteristics of the layer structure.

【学位授予单位】：桂林电子科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP212

【参考文献】