Structural Reconstruction of Reduced Graphene
| Autor: | Wei Yen Woon, Yu Han Wang, Lo-Yueh Chang, Yi Zhe Hong, Chia Hao Chen |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Graphene 02 engineering and technology Chemical vapor deposition 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention Honeycomb structure General Energy Chemical engineering X-ray photoelectron spectroscopy law Irradiation Physical and Theoretical Chemistry 0210 nano-technology Spectroscopy Scanning probe lithography Layer (electronics) |
| Zdroj: | The Journal of Physical Chemistry C. 122:15786-15791 |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/acs.jpcc.8b04937 |
| Popis: | Micrometer-sized oxidation patterns were created in chemical vapor deposition grown multilayered, non-Bernal stacked graphene through scanning probe lithography. The oxidized patterns were then reduced by irradiation using a focused X-ray beam. The topographical, structural, and chemical modifications of the oxidized graphene were characterized through atomic force microscopy, micro-Raman spectroscopy, and micro-X-ray photoelectron spectroscopy, respectively, before and after reduction of the oxidized patterns. For multilayered graphene (MLG), we found that oxidation only occurs for the first outermost layer. Furthermore, it was found that while the oxygen functional groups were almost completely removed by the reduction process, the restoration to a two-dimensional honeycomb structure of the reduced graphene was dependent on the number of layers. Notably, structural restoration is more effective for MLG, as compared to the single-layered counterpart. The mechanism of structural restoration is discussed i... |
| Databáze: | OpenAIRE |
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