Variable Angle Spectroscopic Ellipsometry investigation of CVD-grown monolayer graphene

被引：37
|
作者：
Castriota, Marco [1 ,3 ,5 ]
Politano, Grazia Giuseppina [1 ]
Vena, Carlo [1 ]
De Santo, Maria Penelope [1 ,2 ]
Desiderio, Giovanni [2 ]
Davoli, Mariano [4 ]
Cazzanelli, Enzo [1 ,3 ,5 ]
Versace, Carlo [1 ,2 ]
机构：
[1] Univ Calabria, Dipartimento Fis, I-87036 Arcavacata Di Rende, CS, Italy
[2] Univ Calabria, Dipartimento Fis, Licryl CNR Nanotec, I-87036 Arcavacata Di Rende, CS, Italy
[3] Consorzio Nazl Interuniv Sci Fis Mat, Unita Ric Cosenza, Cosenza, Italy
[4] Dipartimento Biol Ecol & Sci Terra DiBEST, Lab Microscopia Elettron, Ponte P Bucci Cubo 15A PT, I-87036 Arcavacata Di Rende, CS, Italy
[5] Univ Calabria, Dipartimento Fis, Notredame Srl, Arcavacata Di Rende, CS, Italy
来源：
APPLIED SURFACE SCIENCE | 2019年 / 467卷
关键词：
Graphene; Optical constants; Spectroscopic ellipsometry; Doping; Raman spectroscopy; CARBON LINEAR-CHAINS; ELECTRONIC-PROPERTIES; TRANSPORT-PROPERTIES; OPTICAL-PROPERTIES; RAMAN; OXIDE; NANOTUBES; SUBSTRATE; GRAPHITE; SURFACE;
D O I：
10.1016/j.apsusc.2018.10.161
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Despite intensive investigations in the UV (ultraviolet) and visible range, the research on the optical properties of graphene in the extended near and mid infrared range by means of Spectroscopic Ellipsometry (SE) remains limited yet. Herein, the optical properties of a Chemical Vapor Deposition (CVD)-grown monolayer graphene, transferred from a copper substrate onto SiO2/Si, were studied in the broad energy range (0.38-6.2 eV) using Variable Angle Spectroscopic Ellipsometry (VASE). The morphological and the structural properties of the samples were investigated by Micro-Raman Spectroscopy, Wavelength Dispersive X-ray (WDX) analysis, Scanning Electron Microscopy (SEM) and Atomic Force Microscopy (AFM). The Lorentz oscillator model proposed for the optical response of graphene fits very well the experimental data. An unintentional doping, revealed by Micro-Raman Spectroscopy and WDX, is reported.
引用
收藏
页码：213 / 220
页数：8
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