Selective Liquid-Phase Regrowth of Reduced Graphene Oxide, Nanodiamond, and Nanoscale Q-Carbon by Pulsed Laser Annealing for Radiofrequency Devices

2020 ◽  
Vol 3 (6) ◽  
pp. 5178-5188 ◽  
Author(s):  
Siddharth Gupta ◽  
Jagdish Narayan
Keyword(s):  
Graphene Oxide ◽  
Liquid Phase ◽  
Reduced Graphene Oxide ◽  
Laser Annealing ◽  
Pulsed Laser ◽  
Pulsed Laser Annealing ◽  
Reduced Graphene

scholarly journals One-Step Formation of Reduced Graphene Oxide from Insulating Polymers Induced by Laser Writing Method

Crystals ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1308
Author(s):  
Parand R. Riley ◽  
Pratik Joshi ◽  
Hristo Penchev ◽  
Jagdish Narayan ◽  
Roger J. Narayan
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Laser Annealing ◽  
Low Cost ◽  
Oxidation Mechanism ◽  
Multilayered Structure ◽  
Electron Backscattered Diffraction ◽  
Pulsed Laser Annealing ◽  
Reduced Graphene ◽  
Insulating Polymers

Finding a low-cost and effective method at low temperatures for producing reduced graphene oxide (rGO) has been the focus of many efforts in the research community for almost two decades. Overall, rGO is a promising candidate for use in supercapacitors, batteries, biosensors, photovoltaic devices, corrosion inhibitors, and optical devices. Herein, we report the formation of rGO from two electrically insulating polymers, polytetrafluoroethylene (PTFE) and meta-polybenzimidazole fiber (m-PBI), using an excimer pulsed laser annealing (PLA) method. The results from X-ray diffraction, scanning electron microscopy, electron backscattered diffraction, Raman spectroscopy, and Fourier-transform infrared spectroscopy confirm the successful generation of rGO with the formation of a multilayered structure. We investigated the mechanisms for the transformation of PTFE and PBI into rGO. The PTFE transition occurs by both a photochemical mechanism and a photothermal mechanism. The transition of PBI is dominated by a photo-oxidation mechanism and stepwise thermal degradation. After degradation and degassing procedures, both the polymers leave behind free molten carbon with some oxygen and hydrogen content. The free molten carbon undergoes an undercooling process with a regrowth velocity (<4 m s−1) that is necessary for the formation of rGO structures. This approach has the potential for use in creating future selective polymer-written electronics.

Direct Growth of Wafer-Scale, Transparent, p-Type Reduced-Graphene-Oxide-like Thin Films by Pulsed Laser Deposition

ACS Nano ◽  
2020 ◽  
Vol 14 (3) ◽  
pp. 3290-3298
Author(s):  
M. M. Juvaid ◽  
Soumya Sarkar ◽  
Pranjal Kumar Gogoi ◽  
Siddhartha Ghosh ◽  
Meenakshi Annamalai ◽  
...  
Keyword(s):  
Thin Films ◽  
Graphene Oxide ◽  
Pulsed Laser Deposition ◽  
Reduced Graphene Oxide ◽  
Pulsed Laser ◽  
Laser Deposition ◽  
Wafer Scale ◽  
Reduced Graphene ◽  
Direct Growth ◽  
P Type

scholarly journals One-step preparation of nitrogen doped titanium oxide/Au/reduced graphene oxide composite thin films for photocatalytic applications

RSC Advances ◽  
2015 ◽  
Vol 5 (61) ◽  
pp. 49771-49779 ◽  
Author(s):  
A. Datcu ◽  
L. Duta ◽  
A. Pérez del Pino ◽  
C. Logofatu ◽  
C. Luculescu ◽  
...  
Keyword(s):  
Thin Films ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Pulsed Laser ◽  
Laser Evaporation ◽  
Nitrogen Doped ◽  
Reduced Graphene ◽  
Nanocomposite Thin Films ◽  
One Step ◽  
Photocatalytic Applications

Titanium dioxide (TiO2) and TiO2/Au/reduced graphene oxide nanocomposite thin films were grown by ultraviolet matrix assisted pulsed laser evaporation in controlled O2 or N2 atmospheres.

Preparation of hydrophobic reduced graphene oxide supported Ni-B-P-O and Co-B-P-O catalysts and their high hydrodeoxygenation activities

2016 ◽  
Vol 18 (4) ◽  
pp. 984-988 ◽  
Author(s):  
Weiyan Wang ◽  
Pengli Liu ◽  
Kui Wu ◽  
Song Tan ◽  
Wensong Li ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Catalytic Activity ◽  
Liquid Phase ◽  
Reduced Graphene Oxide ◽  
Polar Solvent ◽  
High Catalytic Activity ◽  
Reduced Graphene ◽  
Supported Ni

Hydrophobic reduced graphene oxide supported Ni-B-P-O and Co-B-P-O catalysts were beneficial to disperse in the non-polar solvent, prevent the contact with water, and consequently protected the active phases and exhibited high catalytic activity in the liquid-phase p-cresol HDO reaction.

Production of water-dispersible reduced graphene oxide without stabilizers using liquid-phase photoreduction

Soft Matter ◽  
2017 ◽  
Vol 13 (45) ◽  
pp. 8353-8356 ◽  
Author(s):  
Kazuto Hatakeyama ◽  
Keisuke Awaya ◽  
Michio Koinuma ◽  
Yoshiki Shimizu ◽  
Yukiya Hakuta ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Liquid Phase ◽  
Reduced Graphene Oxide ◽  
Produced Water ◽  
Water Dispersible ◽  
Reduced Graphene

We successfully produced water-dispersible and defect-free reduced graphene oxide by simple pH tuning liquid-phase photoreduction.

Sign in / Sign up

Export Citation Format

Share Document