文档介绍：北京大学博士论文 摘要
CdSe 纳米线等纳米光探测器结合,可实现自驱动紫外激光和红光探测系统, 并可以作为逻辑与门、紫外光多态逻辑门工作,对于实现全光逻辑电路, 有一定意义。
。在显微镜下微操作杆的帮助下,我们发展了一种聚***丙烯酸甲酯(PMMA)/石墨烯微片的定点转移方法,获得了低掺杂的石墨烯器件。与传统转移方法对比证明,转移过程中的悬空烘烤,有助于减少水分子对石墨烯的掺杂效应;此外,傅里叶变换红外光谱表征,证明石墨烯转移过程中,有机分子会残留于石墨烯表面,且残余物非PMMA,而是主要成分是以亚***为主的长链分子。
4. 相比弱光,高功率相干激光光源对提高分子红外振动信号信噪比很有帮助。实验应用光学参量放大(OPO)和差频(DFG) 两种中红外波段激光产生技术,获得了高功率(80mW)宽谱脉冲激光光源,结合石墨烯光栅,发展了高信噪比的快速红外光谱测量技术。利用石墨烯的优秀导电性以及门压可控的光吸收特性,我们尝试使用红外光谱,动态监测离子型表面活性剂在石墨烯表面的吸附过程。
关键词:氧化锌纳米线,光伏效应,光电探测器,石墨烯,徳拜分子层探测,非线性光学技术
A study on electro-optical properties of ZnO nanowire and graphene
Ya-Qing Bie (Condensed Matter Physics)
Directed by Prof. Dapeng Yu, Prof. Zhi-Min Liao, Prof. Feng Wang
Abstract
Traditional semiconductor electro-optical industry has benefited us with great convenience such as munication, fancy imaging and displaying, while faster, lower cost requirement munication and energy expects the realization of more effective electro-optical functional devices based on low dimensional nanoscale material. Therefore, people need to fully understand and manipulate low dimensional electro-optical materials.
In this thesis, we studied low dimesional material ZnO nanowire and graphene in several aspects. Photovoltaic device, UV light emission diode, self- driven ultrafast UV detection and multiple state optical logic gate device are developed on single ZnO nanowire/p-GaN film heterojunction. We also discuss graphene growth on copper foil, graphene transfer process anic molecule residue on graphene after transfer, and a Debye layer electro-chemical response detection using graphene grating; In the end, we analysis the fast UV detection device based on graphene/ZnO/graphene Schottky junction.
The main results are listed as follows:
Tube brush-like ZnO structures were synthesized by simple chemical vapor deposition method and the growth mechanism was studied. Scaning electron Microscopy (SEM) and Energy Dispersive X-ray (EDX) characterization confirm