Ripplocation in graphite nanoplatelets during sonication assisted liquid phase exfoliation
| Autor: | G.M. de Trindade, Stanislav A. Moshkalev, Yu. V. Usov, Andrei V. Alaferdov, Yakov Kopelevich, D. A. Pavlov, M. A. Canesqui, Natalia N. Rozhkova, Raluca Savu, R. R. da Silva |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Shock wave
Condensed Matter - Materials Science Materials science Condensed Matter - Mesoscale and Nanoscale Physics Sonication Ripple Liquid phase Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Exfoliation joint 0104 chemical sciences Cavitation Mesoscale and Nanoscale Physics (cond-mat.mes-hall) General Materials Science Graphite Composite material 0210 nano-technology |
| Popis: | Defects induced by liquid-phase exfoliation of graphite using sonication were studied. It was shown that localized impact by cavitation shock waves can produce bulk ripplocations and various types of dislocations in graphite nanoplatelets. Formation of ripples is more pronounced in large aspect (length/width) ratio platelets or nanobelts. Quasi-periodical ripple systems were observed in many nanobelts after sonication. Mechanism of formation of ripples and dislocations during sonication was proposed. Surprisingly, fast high-temperature processing was found to anneal most of defects. This is consistent with our observations that defects associated with ripplocations are strongly localized and thus can be fast annealed. 16 pages, 9 figures |
| Databáze: | OpenAIRE |
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