Nano-sized graphene flakes: insights from experimental synthesis and first principles calculations
| Autor: | Tzu-Neng Lin, Kuo-Lun Tung, Wei-Ren Liu, Kuei-Ting Hsu, Yi-Rui Chen, Ji-Lin Shen, Pin-Chun Lin |
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| Rok vydání: | 2017 |
| Předmět: |
Pressing
Photoluminescence Materials science Graphene Scanning electron microscope Sonication General Physics and Astronomy Nanotechnology 02 engineering and technology Carbon nanotube 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Homogenization (chemistry) 0104 chemical sciences law.invention law Transmission electron microscopy Physical and Theoretical Chemistry 0210 nano-technology |
| Zdroj: | Physical Chemistry Chemical Physics. 19:6338-6344 |
| ISSN: | 1463-9084 1463-9076 |
| DOI: | 10.1039/c6cp08354d |
| Popis: | In this study, we proposed a cost-effective method for preparing graphene nano-flakes (GNFs) derived from carbon nanotubes (CNTs) via three steps (pressing, homogenization and sonication exfoliation processes). Scanning electron microscopy (SEM), transmission electron microscopy (TEM), atomic force microscopy (AFM), laser scattering, as well as ultraviolet-visible and photoluminescence (PL) measurements were carried out. The results indicated that the size of as-synthesized GNFs was approximately 40-50 nm. Furthermore, we also used first principles calculations to understand the transformation from CNTs to GNFs from the viewpoints of the edge formation energies of GNFs in different shapes and sizes. The corresponding photoluminescence measurements of GNFs were carried out in this work. |
| Databáze: | OpenAIRE |
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