scholarly journals Strain Gauges Based on CVD Graphene Layers and Exfoliated Graphene Nanoplatelets with Enhanced Reproducibility and Scalability for Large Quantities

Sensors ◽  
2017 ◽  
Vol 17 (12) ◽  
pp. 2937 ◽  
Author(s):  
Volkan Yokaribas ◽  
Stefan Wagner ◽  
Daniel Schneider ◽  
Philipp Friebertshäuser ◽  
Max Lemme ◽  
...  
Keyword(s):  
Graphene Nanoplatelets ◽  
Strain Gauges ◽  
Cvd Graphene ◽  
Graphene Layers ◽  
Exfoliated Graphene

Natural solvent facilitated high-shear exfoliated graphene nanoplatelets enabled economically-efficient and stable DSSC

2021 ◽  
Vol 287 ◽  
pp. 129263
Author(s):  
Siva Sankar Nemala ◽  
Sujitha Ravulapalli ◽  
Purnendu Kartikay ◽  
Ramu Banavath ◽  
Sudhanshu Mallick ◽  
...  
Keyword(s):  
Graphene Nanoplatelets ◽  
High Shear ◽  
Exfoliated Graphene

Tuning the electrical properties of exfoliated graphene layers using deep ultraviolet irradiation

2014 ◽  
Vol 2 (27) ◽  
pp. 5404-5410 ◽  
Author(s):  
M. Z. Iqbal ◽  
M. F. Khan ◽  
M. W. Iqbal ◽  
Jonghwa Eom
Keyword(s):  
Electrical Properties ◽  
Ultraviolet Irradiation ◽  
Single Layer ◽  
Single Layer Graphene ◽  
Graphene Bilayer ◽  
Graphene Layers ◽  
Exfoliated Graphene ◽  
Deep Ultraviolet ◽  
Trilayer Graphene ◽  
Unique Band

Deep ultraviolet irradiation tunes the electronic properties of mechanically exfoliated single-layer graphene, bilayer graphene, and trilayer graphene while maintaining their unique band structure and electrical properties.

The role of SEBS in tailoring the interface between the polymer matrix and exfoliated graphene nanoplatelets in hybrid composites

2015 ◽  
Vol 163 ◽  
pp. 182-189 ◽  
Author(s):  
Jyotishkumar Parameswaranpillai ◽  
George Joseph ◽  
K.P. Shinu ◽  
P.R. Sreejesh ◽  
Seno Jose ◽  
...  
Keyword(s):  
Polymer Matrix ◽  
Hybrid Composites ◽  
Graphene Nanoplatelets ◽  
Exfoliated Graphene

Electron-Selective TiO2 /CVD-Graphene Layers for Photocorrosion Inhibition in Cu2 O Photocathodes

2017 ◽  
Vol 4 (17) ◽  
pp. 1700271 ◽  
Author(s):  
Chandan Das ◽  
Balakrishna Ananthoju ◽  
Arpan Kumar Dhara ◽  
Mohammed Aslam ◽  
Shaibal K. Sarkar ◽  
...  
Keyword(s):  
Cvd Graphene ◽  
Graphene Layers ◽  
Photocorrosion Inhibition

Double-layer CVD graphene as stretchable transparent electrodes

Nanoscale ◽  
2014 ◽  
Vol 6 (11) ◽  
pp. 6057-6064 ◽  
Author(s):  
Sejeong Won ◽  
Yun Hwangbo ◽  
Seoung-Ki Lee ◽  
Kyung-Shik Kim ◽  
Kwang-Seop Kim ◽  
...  
Keyword(s):  
Double Layer ◽  
Strain Relaxation ◽  
Transparent Electrodes ◽  
Cvd Graphene ◽  
Graphene Layers

DLG has a superior electromechanical stretchability compared to SLG owing to strain relaxationviasliding of graphene layers over one another.

Deep UV Raman Spectroscopy of Epitaxial Graphenes on Vicinal 6H-SiC Substrates

2010 ◽  
Vol 645-648 ◽  
pp. 611-614
Author(s):  
Susumu Kamoi ◽  
Noriyuki Hasuike ◽  
Kenji Kisoda ◽  
Hiroshi Harima ◽  
Kouhei Morita ◽  
...  
Keyword(s):  
Graphene Layer ◽  
Peak Frequency ◽  
Epitaxial Graphene ◽  
Intensity Increase ◽  
Band Frequency ◽  
Graphene Layers ◽  
Exfoliated Graphene ◽  
Uv Raman Spectroscopy ◽  
Uv Raman ◽  
Deep Ultraviolet

We report microscopic Raman scattering studies of epitaxial graphene grown on SiC substrates using a deep-ultraviolet (UV) laser excitation at 266 nm to elucidate the interaction between the graphene layer and the substrate. The samples were grown on the Si-face of vicinal 6H-SiC (0001) substrates by sublimation of Si from SiC. The G band of the epitaxial graphene layer was clearly observed without any data manipulation. Increasing the number of graphene layers, the peak frequency of the G-band decreases linearly, while the peak width and the intensity increase. The G-band frequency of the graphene layers on SiC is higher than those of exfoliated graphene, which has been ascribed to compression from the substrate.

scholarly journals Protein-assisted scalable mechanochemical exfoliation of few-layer biocompatible graphene nanosheets

2021 ◽  
Vol 8 (3) ◽  
Author(s):  
Deepak-George Thomas ◽  
Steven De-Alwis ◽  
Shalabh Gupta ◽  
Vitalij K. Pecharsky ◽  
Deyny Mendivelso-Perez ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Graphene Nanosheets ◽  
Cost Effective ◽  
X Ray Diffraction ◽  
Cytotoxic Effects ◽  
Graphene Layers ◽  
Exfoliated Graphene ◽  
Transmission Electron ◽  
Few Layer Graphene

A facile method to produce few-layer graphene (FLG) nanosheets is developed using protein-assisted mechanical exfoliation. The predominant shear forces that are generated in a planetary ball mill facilitate the exfoliation of graphene layers from graphite flakes. The process employs a commonly known protein, bovine serum albumin (BSA), which not only acts as an effective exfoliation agent but also provides stability by preventing restacking of the graphene layers. The latter is demonstrated by the excellent long-term dispersibility of exfoliated graphene in an aqueous BSA solution, which exemplifies a common biological medium. The development of such potentially scalable and toxin-free methods is critical for producing cost-effective biocompatible graphene, enabling numerous possible biomedical and biological applications. A methodical study was performed to identify the effect of time and varying concentrations of BSA towards graphene exfoliation. The fabricated product has been characterized using Raman spectroscopy, powder X-ray diffraction, transmission electron microscopy and scanning electron microscopy. The BSA-FLG dispersion was then placed in media containing Astrocyte cells to check for cytotoxicity. It was found that lower concentrations of BSA-FLG dispersion had only minute cytotoxic effects on the Astrocyte cells.

scholarly journals Electrochemically Exfoliated Graphene-Like Nanosheets for Use in Ceramic Nanocomposites

Materials ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2656
Author(s):  
Rosalía Poyato ◽  
Reyes Verdugo ◽  
Carmen Muñoz-Ferreiro ◽  
Ángela Gallardo-López
Keyword(s):  
Graphene Nanosheets ◽  
Ceramic Matrix Composite ◽  
Tetragonal Zirconia ◽  
Microstructural Characterization ◽  
Homogeneous Distribution ◽  
Graphene Layers ◽  
Exfoliated Graphene ◽  
Plasma Sintering ◽  
The Matrix ◽  
Spark Plasma

In this work, the synthesis of graphene-like nanosheets (GNS) by an electrochemical exfoliation method, their microstructural characterization and their performance as fillers in a ceramic matrix composite have been assessed. To fabricate the composites, 3 mol % yttria tetragonal zirconia (3YTZP) powders with 1 vol % GNS were processed by planetary ball milling in tert-butanol to enhance the GNS distribution throughout the matrix, and densified by spark plasma sintering (SPS). According to a thorough Raman analysis and SEM observations, the electrochemically exfoliated GNS possessed less than 10 graphene layers and a lateral size lower than 1 μm. However, they contained amorphous carbon and vacancy-like defects. In contrast the GNS in the sintered composite exhibited enhanced quality with a lower number of defects, and they were wavy, semi-transparent and with very low thickness. The obtained nanocomposite was fully dense with a homogeneous distribution of GNS into the matrix. The Vickers hardness of the nanocomposite showed similar values to those of a monolithic 3YTZP ceramic sintered in the same conditions, and to the reported ones for a 3YTZP composite with the same content of commercial graphene nanosheets.

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