Hydrothermal Unzipping of Multiwalled Carbon Nanotubes and Cutting of Graphene by Potassium Superoxide
The dual use of potassium superoxide (KO<sub>2</sub>) to unzip multiwalled carbon nanotubes (MWCNTs) and cut graphene under hydrothermal conditions is described in this work. The KO<sub>2</sub>-assisted hydrothermal treatment was proven to be a high-yield method for forming g...
| 發表在: | Nanomaterials |
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| Main Authors: | , , , , |
| 格式: | Article |
| 語言: | 英语 |
| 出版: |
MDPI AG
2022-01-01
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| 在線閱讀: | https://www.mdpi.com/2079-4991/12/3/447 |
| _version_ | 1850385815201382400 |
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| author | Apostolos Koutsioukis Konstantinos Spyrou Nikolaos Chalmpes Dimitrios Gournis Vasilios Georgakilas |
| author_facet | Apostolos Koutsioukis Konstantinos Spyrou Nikolaos Chalmpes Dimitrios Gournis Vasilios Georgakilas |
| author_sort | Apostolos Koutsioukis |
| collection | DOAJ |
| container_title | Nanomaterials |
| description | The dual use of potassium superoxide (KO<sub>2</sub>) to unzip multiwalled carbon nanotubes (MWCNTs) and cut graphene under hydrothermal conditions is described in this work. The KO<sub>2</sub>-assisted hydrothermal treatment was proven to be a high-yield method for forming graphene nanoribbons and dots or sub-micro-sized graphene nanosheets. Starting with functionalized MWCNTs, the method produces water-dispersible graphene nanoribbons with characteristic photoluminescence depending on their width. Using pristine graphene, the hydrothermal treatment with KO<sub>2</sub> produces nanosized graphene sheets and graphene quantum dots with diameters of less than 10 nm. The latter showed a bright white photoluminescence. The effective hydrothermal unzipping of MWNTs and the cutting of large graphene nanosheets is a valuable top-down approach for the preparation of graphene nanoribbons and small nanographenes. Both products with limited dimensions have interesting applications in nanoelectronics and bionanotechnology. |
| format | Article |
| id | doaj-art-e9bb612eabb74c0190c10accdbbe582b |
| institution | Directory of Open Access Journals |
| issn | 2079-4991 |
| language | English |
| publishDate | 2022-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| spelling | doaj-art-e9bb612eabb74c0190c10accdbbe582b2025-08-19T22:55:39ZengMDPI AGNanomaterials2079-49912022-01-0112344710.3390/nano12030447Hydrothermal Unzipping of Multiwalled Carbon Nanotubes and Cutting of Graphene by Potassium SuperoxideApostolos Koutsioukis0Konstantinos Spyrou1Nikolaos Chalmpes2Dimitrios Gournis3Vasilios Georgakilas4Department of Materials Science, University of Patras, 26504 Rio, GreeceDepartment of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, GreeceDepartment of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, GreeceDepartment of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, GreeceDepartment of Materials Science, University of Patras, 26504 Rio, GreeceThe dual use of potassium superoxide (KO<sub>2</sub>) to unzip multiwalled carbon nanotubes (MWCNTs) and cut graphene under hydrothermal conditions is described in this work. The KO<sub>2</sub>-assisted hydrothermal treatment was proven to be a high-yield method for forming graphene nanoribbons and dots or sub-micro-sized graphene nanosheets. Starting with functionalized MWCNTs, the method produces water-dispersible graphene nanoribbons with characteristic photoluminescence depending on their width. Using pristine graphene, the hydrothermal treatment with KO<sub>2</sub> produces nanosized graphene sheets and graphene quantum dots with diameters of less than 10 nm. The latter showed a bright white photoluminescence. The effective hydrothermal unzipping of MWNTs and the cutting of large graphene nanosheets is a valuable top-down approach for the preparation of graphene nanoribbons and small nanographenes. Both products with limited dimensions have interesting applications in nanoelectronics and bionanotechnology.https://www.mdpi.com/2079-4991/12/3/447graphene nanoribbonsgraphene dotsnanographeneunzippinghydrothermal treatmentpotassium superoxide |
| spellingShingle | Apostolos Koutsioukis Konstantinos Spyrou Nikolaos Chalmpes Dimitrios Gournis Vasilios Georgakilas Hydrothermal Unzipping of Multiwalled Carbon Nanotubes and Cutting of Graphene by Potassium Superoxide graphene nanoribbons graphene dots nanographene unzipping hydrothermal treatment potassium superoxide |
| title | Hydrothermal Unzipping of Multiwalled Carbon Nanotubes and Cutting of Graphene by Potassium Superoxide |
| title_full | Hydrothermal Unzipping of Multiwalled Carbon Nanotubes and Cutting of Graphene by Potassium Superoxide |
| title_fullStr | Hydrothermal Unzipping of Multiwalled Carbon Nanotubes and Cutting of Graphene by Potassium Superoxide |
| title_full_unstemmed | Hydrothermal Unzipping of Multiwalled Carbon Nanotubes and Cutting of Graphene by Potassium Superoxide |
| title_short | Hydrothermal Unzipping of Multiwalled Carbon Nanotubes and Cutting of Graphene by Potassium Superoxide |
| title_sort | hydrothermal unzipping of multiwalled carbon nanotubes and cutting of graphene by potassium superoxide |
| topic | graphene nanoribbons graphene dots nanographene unzipping hydrothermal treatment potassium superoxide |
| url | https://www.mdpi.com/2079-4991/12/3/447 |
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