Optical properties of graphene oxide and reduced graphene oxide determined by spectroscopic ellipsometry

2017 ◽  
Vol 421 ◽  
pp. 778-782 ◽  
Author(s):  
Stefan Schöche ◽  
Nina Hong ◽  
Mohammadreza Khorasaninejad ◽  
Antonio Ambrosio ◽  
Emanuele Orabona ◽  
...  
Keyword(s):  
Optical Properties ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Spectroscopic Ellipsometry ◽  
Reduced Graphene

scholarly journals Variable Angle Spectroscopic Ellipsometry Characterization of Reduced Graphene Oxide Stabilized with Poly(Sodium 4-Styrenesulfonate)

Coatings ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 743 ◽  
Author(s):  
Grazia Giuseppina Politano ◽  
Carlo Vena ◽  
Giovanni Desiderio ◽  
Carlo Versace
Keyword(s):  
Optical Properties ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Spectroscopic Ellipsometry ◽  
Morphological Properties ◽  
Si Substrates ◽  
Variable Angle ◽  
Reduced Graphene ◽  
Variable Angle Spectroscopic Ellipsometry

Lately, the optical properties of Graphene Oxide (GO) and Reduced Graphene Oxide (RGO) films have been studied in the ultraviolet and visible spectral range. However, the accurate optical properties in the extended near-infrared and mid-infrared range have not been published yet. In this work, we report a Variable Angle Spectroscopic Ellipsometry (VASE) characterization of GO thin films dip-coated on SiO2/Si substrates and thermally reduced GO films in the 0.38–4.1 eV photon energy range. Moreover, the optical properties of RGO stabilized with poly(sodium 4-styrenesulfonate) (PSS) films dip-coated on SiO2/Si substrates are studied in the same range for the first time. The Lorentz optical models fit well with the experimental data. In addition, the morphological properties of the samples were investigated by Scanning Electron Microscopy (SEM) analysis.

Electrical and optical properties of reduced graphene oxide thin film deposited onto polyethylene terephthalate by spin coating technique

2017 ◽  
Vol 56 (28) ◽  
pp. 7774 ◽  
Author(s):  
Harry Anderson Rivera Tito ◽  
Anne Habermehl ◽  
Christian Müller ◽  
Sebastian Beck ◽  
Carlos Romero Nieto ◽  
...  
Keyword(s):  
Thin Film ◽  
Optical Properties ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Polyethylene Terephthalate ◽  
Spin Coating ◽  
Oxide Thin Film ◽  
Electrical And Optical Properties ◽  
Coating Technique ◽  
Reduced Graphene

Self-propagated combustion synthesis of few-layered graphene: an optical properties perspective

Nanoscale ◽  
2018 ◽  
Vol 10 (16) ◽  
pp. 7581-7588 ◽  
Author(s):  
Manonmani Mohandoss ◽  
Soujit Sen Gupta ◽  
Ramesh Kumar ◽  
Md Rabiul Islam ◽  
Anirban Som ◽  
...  
Keyword(s):  
Optical Properties ◽  
Graphene Oxide ◽  
Combustion Synthesis ◽  
Reduced Graphene Oxide ◽  
Cost Effective ◽  
Effective Strategy ◽  
Cost Effective Strategy ◽  
Reduced Graphene

This paper describes a labour-efficient and cost-effective strategy to prepare few-layered reduced graphene oxide like sheets from graphite.

The Role of Reduced Graphene Oxide Concentration as Ablated Material on Optical Properties of Graphene Quantum Dots

2019 ◽  
Vol 948 ◽  
pp. 267-273 ◽  
Author(s):  
Fiqhri Heda Murdaka ◽  
Ahmad Kusumaatmaja ◽  
Isnaeni ◽  
Iman Santoso
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Graphene Oxide ◽  
Band Gap ◽  
Reduced Graphene Oxide ◽  
Optical Band Gap ◽  
Graphene Quantum Dots ◽  
Absorption Peak ◽  
Oxygen Defect ◽  
Reduced Graphene

We report the synthesize of Graphene Quantum Dots (GQDs) using ablation method with reduced Graphene Oxide (rGO) solution as a starting material. We have varied the concentration of rGO as following: 0.5, 2, 5 mg/ml and then have ablated them using 800 nm Ti-Sapphire femtosecond laser to obtain GQDs. From the UV-Vis data, we observed that the more concentration of rGO is being ablated, the more secondary absorption peak at 255.1 nm appeared. This secondary absorption peak is a characteristic of n-π* bonding due to the presence of oxygen defect which occurs as a result of the interaction between the laser and the water in rGO solution. We conclude that the population of oxigen defect in GQDs is increasing, following the increase of rGO concentration and could alter the optical properties of GQD. On the other hand, using Tauc’s plot, we confirm that the increase of rGO concentration as the ablated material does not alter GQDs optical band gap. However, it will slightly reduce both, direct and indirect Oxygen defect related optical band gap.

Optical properties and dynamics excitation relaxation in reduced graphene oxide functionalized with nanostructured porphyrins

2015 ◽  
Vol 42 ◽  
pp. 479-483 ◽  
Author(s):  
M. Khenfouch ◽  
O. Bajjou ◽  
M. Baïtoul ◽  
N. Mongwaketsi ◽  
M. Maaza ◽  
...  
Keyword(s):  
Optical Properties ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Reduced Graphene

The effects of central metals on the photophysical and nonlinear optical properties of reduced graphene oxide–metal(ii) phthalocyanine hybrids

2015 ◽  
Vol 17 (11) ◽  
pp. 7149-7157 ◽  
Author(s):  
Weina Song ◽  
Chunying He ◽  
Yongli Dong ◽  
Wang Zhang ◽  
Yachen Gao ◽  
...  
Keyword(s):  
Optical Properties ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Nonlinear Optical ◽  
Nonlinear Optical Properties ◽  
Optical Performance ◽  
Reduced Graphene

An investigation of the effects of central metals on the photophysical and nonlinear optical performance of RGO–MPc hybrids.

scholarly journals Solution of reduced graphene oxide synthesized from coconut shells and its optical properties

2016 ◽  
Author(s):  
Kusuma Wardhani Mas’udah ◽  
I Made Ananta Nugraha ◽  
Saiful Abidin ◽  
Ali Mufid ◽  
Fahmi Astuti ◽  
...  
Keyword(s):  
Optical Properties ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Reduced Graphene ◽  
Coconut Shells
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