Facile synthesis of multi-layer graphene by electrochemical exfoliation using organic solvent
This paper presents a facile method of producing graphene nanosheets by organic liquid-assisted electrochemical exfoliation using tetramethyleammonium hydroxide (TMAH) as organic electrolyte. The process involves low-cost copper as ground electrode and carbon block as anode or cathode. The applicati...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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De Gruyter
2018-12-01
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| Series: | Nanotechnology Reviews |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/ntrev-2018-0094 |
| _version_ | 1819026559285067776 |
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| author | Das Swapan Ghosh Chandan K. Sarkar Chandan K. Roy Sunipa |
| author_facet | Das Swapan Ghosh Chandan K. Sarkar Chandan K. Roy Sunipa |
| author_sort | Das Swapan |
| collection | DOAJ |
| description | This paper presents a facile method of producing graphene nanosheets by organic liquid-assisted electrochemical exfoliation using tetramethyleammonium hydroxide (TMAH) as organic electrolyte. The process involves low-cost copper as ground electrode and carbon block as anode or cathode. The application of organic electrolyte eliminates the presence of unwanted metal ions on the graphene nanosheets. To the best of our knowledge, this is a maiden effort of producing graphene with pure organic electrolyte using TMAH with low-cost copper electrode. By the use of TMAH, conformal large-area graphene nanosheets of 4.3 nm thickness with an average sheet diameter of 3–4 μm have been obtained. Graphene nanosheets are characterized by X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy, ultraviolet-visible spectroscopy, Fourier transform infrared, Raman spectroscopy, and atomic force microscopy. Raman characterization confirms the conservation of the intrinsic nature of few-layer graphene. Graphene nanosheets are dissolved in a polar aprotic solvent dimethylformamide and are drop coated on the Si/SiO2 substrate to make a thin film of graphene. Films are annealed to remove any residual solvent attached to it. Different annealing temperatures (50–200°C) were reported. Sheet resistances were measured before and after annealing, with a remarkable decrease afterward. Current-voltage characteristics were studied to evaluate the conductivity of the graphene nanosheets produced. |
| first_indexed | 2024-12-21T05:28:30Z |
| format | Article |
| id | doaj.art-227d1590a6d04e86a23db8a7dad4a606 |
| institution | Directory Open Access Journal |
| issn | 2191-9089 2191-9097 |
| language | English |
| last_indexed | 2024-12-21T05:28:30Z |
| publishDate | 2018-12-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Nanotechnology Reviews |
| spelling | doaj.art-227d1590a6d04e86a23db8a7dad4a6062022-12-21T19:14:36ZengDe GruyterNanotechnology Reviews2191-90892191-90972018-12-017649750810.1515/ntrev-2018-0094Facile synthesis of multi-layer graphene by electrochemical exfoliation using organic solventDas Swapan0Ghosh Chandan K.1Sarkar Chandan K.2Roy Sunipa3IC Design and Fabrication Center, Department of Electronics and Telecommunication Engineering, Jadavpur University, Kolkata 700 032, IndiaSchool of Material Science and Nanotechnology, Jadavpur University, Kolkata 700032, IndiaDepartment of Electronics and Telecommunication Engineering, Jadavpur University, Kolkata 700 032, IndiaIC Design and Fabrication Center, Department of Electronics and Telecommunication Engineering, Jadavpur University, Kolkata 700 032, IndiaThis paper presents a facile method of producing graphene nanosheets by organic liquid-assisted electrochemical exfoliation using tetramethyleammonium hydroxide (TMAH) as organic electrolyte. The process involves low-cost copper as ground electrode and carbon block as anode or cathode. The application of organic electrolyte eliminates the presence of unwanted metal ions on the graphene nanosheets. To the best of our knowledge, this is a maiden effort of producing graphene with pure organic electrolyte using TMAH with low-cost copper electrode. By the use of TMAH, conformal large-area graphene nanosheets of 4.3 nm thickness with an average sheet diameter of 3–4 μm have been obtained. Graphene nanosheets are characterized by X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy, ultraviolet-visible spectroscopy, Fourier transform infrared, Raman spectroscopy, and atomic force microscopy. Raman characterization confirms the conservation of the intrinsic nature of few-layer graphene. Graphene nanosheets are dissolved in a polar aprotic solvent dimethylformamide and are drop coated on the Si/SiO2 substrate to make a thin film of graphene. Films are annealed to remove any residual solvent attached to it. Different annealing temperatures (50–200°C) were reported. Sheet resistances were measured before and after annealing, with a remarkable decrease afterward. Current-voltage characteristics were studied to evaluate the conductivity of the graphene nanosheets produced.https://doi.org/10.1515/ntrev-2018-0094dmfelectrochemical exfoliationgraphene nanosheetsthin filmtmah |
| spellingShingle | Das Swapan Ghosh Chandan K. Sarkar Chandan K. Roy Sunipa Facile synthesis of multi-layer graphene by electrochemical exfoliation using organic solvent Nanotechnology Reviews dmf electrochemical exfoliation graphene nanosheets thin film tmah |
| title | Facile synthesis of multi-layer graphene by electrochemical exfoliation using organic solvent |
| title_full | Facile synthesis of multi-layer graphene by electrochemical exfoliation using organic solvent |
| title_fullStr | Facile synthesis of multi-layer graphene by electrochemical exfoliation using organic solvent |
| title_full_unstemmed | Facile synthesis of multi-layer graphene by electrochemical exfoliation using organic solvent |
| title_short | Facile synthesis of multi-layer graphene by electrochemical exfoliation using organic solvent |
| title_sort | facile synthesis of multi layer graphene by electrochemical exfoliation using organic solvent |
| topic | dmf electrochemical exfoliation graphene nanosheets thin film tmah |
| url | https://doi.org/10.1515/ntrev-2018-0094 |
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