单晶二氧化钒纳米薄膜的制备及其相变研究  

Preparation of Single Crystal VO_(2) Nanofilm and It’s Property of Metal-Insulator Transition

作　　者：易明芳 解梦园 王元培 YI Mingfang;XIE Mengyuan;WANG Yuanpei(School of Mathematics and Physics,Anqing Normal University,Anqing 246133,China)

机构地区：[1]安庆师范大学数理学院,安徽安庆246133

出　　处：《安庆师范大学学报(自然科学版)》2024年第4期32-36,共5页Journal of Anqing Normal University(Natural Science Edition)

基　　金：安徽省质量工程教育教学管理重大项目(2023jxgl033)。

摘　　要：二氧化钒(VO2)是一种具有相变特性的氧化物,改变温度到一定值时,其晶体结构、电学性质、光学性质会发生变化,因此VO2具有广阔的应用前景。本文报道用一种用溶胶-凝胶法成功制备单晶VO2纳米薄膜的实验结果。采用X射线衍射仪和拉曼光谱仪对制备的样品进行表征,结果表明,所制备样品为高质量的单晶VO2纳米薄膜,其变温拉曼光谱和红外吸收光谱都表明,该样品具有良好的热致相变特性,且相变是可逆的。这一性质可用于光开关、激光防护等领域。Vanadium dioxide(VO2)is an oxide with phase transition properties.Around the Tc,VO2 undergoes metal-insulator transition(MIT)from a low temperature monoclinic insulator phase to a high-temperature rutile metal phase.The MIT is accompanied by the changes in structure,electrical property as well as optical property.Its unique properties have broad potential applications.The single crystal VO2 nanofilms was prepared by using the sol-gel method.The samples prepared were characterized by X-ray and Raman spectroscopy,which indicated that the samples are single crystal VO2 nanofilms with high quality.The temperature-dependent Raman spectroscopy and infrared absorbance indicate that the sample has good thermal induced phase transition characteristics,which are reversible.This property can be used in applications such as optical switches and laser protection.

关 键 词：二氧化钒薄膜 热致相变 可逆 

分 类 号：O792[理学—晶体学]