Assembly and benign step-by-step post-treatment of oppositely charged reduced graphene oxides for transparent conductive thin films with multiple applications

Nanoscale ◽  
2012 ◽  
Vol 4 (11) ◽  
pp. 3558 ◽  
Author(s):  
Jiayi Zhu ◽  
Junhui He
Keyword(s):  
Thin Films ◽  
Post Treatment ◽  
Graphene Oxides ◽  
Reduced Graphene ◽  
Reduced Graphene Oxides ◽  
Conductive Thin Films ◽  
Oppositely Charged

scholarly journals Conductive Nanofilms with Oppositely Charged Reduced Graphene Oxides as a Base for Electroactive Coatings and Sensors

2021 ◽  
Vol 5 (2) ◽  
pp. 20
Author(s):  
Tomasz Kruk ◽  
Piotr Warszyński
Keyword(s):  
Thin Films ◽  
Graphene Oxide ◽  
Low Cost ◽  
Thermal Reduction ◽  
Layer By Layer ◽  
Graphene Oxides ◽  
Lbl Assembly ◽  
Reduced Graphene ◽  
Amidation Reaction ◽  
Oppositely Charged

We demonstrate a method for the formation of multilayers composed of reduced graphene oxide (rGO), which can be used for transparent, conducting thin films. Using the layer-by-layer (LbL) assembly of positively and negatively charged GO sheets, we could obtain thin films with highly controllable sheet resistance. The natural negative charge of graphene oxide was turned to positive by the amidation reaction. After forming the multilayer films, the graphene oxide underwent thermal reduction at temperatures above 150 °C. The (rGO+/rGO−) films were characterized by UV-Vis and scanning electron microscopy (SEM), and their conductivity was measured by the four-point method. We found that after deposition of five (rGO+/rGO−), the coating structure reached the percolation limit, and the film resistance decreased more gradually to around 20 kΩ/sq for the films obtained by eleven deposition cycles with graphene oxide reduced at 250 °C. The formation of thin films on polyimide allows the forming of new flexible conductive materials, which can find applications, e.g., in biomedicine as new electroactive, low-cost, disposable sensors.

Fabrication and its Transient Optical Properties of Graphene Thin Films

2013 ◽  
Vol 743-744 ◽  
pp. 892-902 ◽  
Author(s):  
Jia Yi Zhu ◽  
Jun Hui He
Keyword(s):  
Thin Films ◽  
Optical Properties ◽  
Post Treatment ◽  
Layer By Layer ◽  
Graphene Oxides ◽  
Visible Absorption ◽  
Lbl Assembly ◽  
Transmission Electron ◽  
Reduced Graphene ◽  
Means Of Transmission

Graphene thin films were fabricated via layer-by-layer (LbL) assembly of oppositely charged reduced graphene oxides (RGOs) and benign post-treatment. RGOs dispersions and thin films were characterized by means of transmission electron microscopy, UV-visible absorption spectrophotometer, Raman spectroscopy, and four-point probe. It was found that graphene thin films exhibited a significant increase in electrical conductivity after post-treatment. In addition, post-treatment and film thickness showed an effect on transient optical properties of graphene thin films. The transmittance (800 nm, pulse) of (RGO-PDDA+/RGO-O-)30 film decreased after post-treatment, and the transmittance (800 nm, pulse) of post-treated films decreased with increasing the number of LbL assembled bilayers.

Enhanced 1T phase promotes sodium storage performances of MoS2 flower-like spheres with embedded reduced graphene oxides

2021 ◽  
Vol 297 ◽  
pp. 122027
Author(s):  
Xianglin Yu ◽  
Ruixue Li ◽  
Xinyu Hu ◽  
Ren He ◽  
Kehui Xue ◽  
...  
Keyword(s):  
Graphene Oxides ◽  
Reduced Graphene ◽  
Reduced Graphene Oxides ◽  
Sodium Storage

scholarly journals Analysis of Reduced Graphene Oxides by X-ray Photoelectron Spectroscopy and Electrochemical Capacitance

2013 ◽  
Vol 42 (8) ◽  
pp. 924-926 ◽  
Author(s):  
Michio Koinuma ◽  
Hikaru Tateishi ◽  
Kazuto Hatakeyama ◽  
Shinsuke Miyamoto ◽  
Chikako Ogata ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Graphene Oxides ◽  
Electrochemical Capacitance ◽  
X Ray ◽  
Reduced Graphene ◽  
Reduced Graphene Oxides

Effect of thermally reduced graphene oxides obtained at different temperatures on the barrier and mechanical properties of polypropylene/TRGO and polyamide‐6/TRGO nanocomposites

2018 ◽  
Vol 40 (S2) ◽  
pp. E1746-E1756 ◽  
Author(s):  
Moisés Gómez ◽  
Alexis Díaz ◽  
Paula Reyes ◽  
Mehrdad Yazdani‐Pedram ◽  
Sônia Marlí Bohrz Nachtigall ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Polyamide 6 ◽  
Graphene Oxides ◽  
Reduced Graphene ◽  
Different Temperatures ◽  
Reduced Graphene Oxides

Hydrophobic ligand-mediated hierarchical Cu nanoparticles on reduced graphene oxides for SERS platform

CrystEngComm ◽  
2016 ◽  
Vol 18 (40) ◽  
pp. 7764-7771 ◽  
Author(s):  
LiLi He ◽  
Changqing Liu ◽  
Jiugang Hu ◽  
Wanmiao Gu ◽  
Yu Zhang ◽  
...  
Keyword(s):  
Cu Nanoparticles ◽  
Graphene Oxides ◽  
Reduced Graphene ◽  
Reduced Graphene Oxides ◽  
Hydrophobic Ligand

scholarly journals Reduced graphene oxides with engineered defects enable efficient electrochemical reduction of dinitrogen to ammonia in wide pH range

Nano Energy ◽  
2020 ◽  
Vol 68 ◽  
pp. 104323 ◽  
Author(s):  
Mingli Zhang ◽  
Changhyeok Choi ◽  
Rupeng Huo ◽  
Geun Ho Gu ◽  
Song Hong ◽  
...  
Keyword(s):  
Electrochemical Reduction ◽  
Graphene Oxides ◽  
Reduced Graphene ◽  
Wide Ph Range ◽  
Reduced Graphene Oxides ◽  
Ph Range

scholarly journals Microwave-assisted fast fabrication of a nanosized Pt3Co alloy on reduced graphene oxides

2014 ◽  
Vol 35 (12) ◽  
pp. 2029-2037 ◽  
Author(s):  
Juanjuan Shi ◽  
Renfeng Nie ◽  
Mengyuan Zhang ◽  
Mengsi Zhao ◽  
Zhaoyin Hou
Keyword(s):  
Graphene Oxides ◽  
Microwave Assisted ◽  
Reduced Graphene ◽  
Reduced Graphene Oxides
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