2015 Fiscal Year Annual Research Report
Atomically precise oxidation and alkylation of graphene leading to nanopattern formation on the surface
| Project/Area Number |
25390013
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| Research Institution | Gunma University |
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Principal Investigator |
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Keywords | グラフェン / 表面・界面物性 / ナノ材料 |
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| Outline of Annual Research Achievements |
The present research project is focused on the invention of new chemistry for atomically precise oxidation and alkylation of graphene, which can lead to entirely new classes of two-dimensional nanomaterials with vast tunability in chemical, electrical, and optical properties. After the successful achievements in aqueous phase oxidation in the first year of the project, I have investigated the methylation of epitaxial graphene (EG) grown on the SiC substrate through two-steps chlorination-alkylation reactions using Grignard reagent in the second year of the project. To see if the other halogenated graphene can be utilized for further modification of graphene including acylation, I have made a detailed investigation of different halogenations (i.e., F, Cl, Br, and I) of EG on SiC and its reaction with aryl Grignard reagents in the third year of the project. I found that although, the chlorinated EG on SiC readily reacts with Grignard reagent, the fluorinated graphene seems robust towards Grignard reagents. Based on the results, I have published a full articles in a reputed peer reviwed international journal.
As planned earlier, I also made an attempt to directly functionlized graphene in aqueous phase and the preliminary investigation suggests that the radical intermediate formed during the chemical synthesis of Grignard reagent can be bind directly onto EG.
For fabrication of nanopattern on functionalized graphene, I have employed scanning prove microscope technique on both oxidized and organically functionalized graphene but could not see any visible nanopattern structure.
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