Властивостi графенових флейкiв, отриманих ультразвуковою обробкою графiту
A possibility to obtain graphene and graphene layers with the help of the ultrasound (US) treatment of pyrolytic graphite in an N-methyl pyrrolidone (NMP) solution has been demonstrated. Raman spectroscopy is confirmed to be an effective method for monitoring the graphite transformation into graphen...
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| Дата: | 2018 |
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| Автори: | , , , , , , , , |
| Формат: | Стаття |
| Мова: | English |
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Publishing house "Academperiodika"
2018
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| Онлайн доступ: | https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2018683 |
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| Назва журналу: | Ukrainian Journal of Physics |
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Ukrainian Journal of Physics| id |
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ujp2-article-20186832019-04-23T07:25:26Z Properties of Graphene Flakes Obtained by Treating Graphite with Ultrasound Властивостi графенових флейкiв, отриманих ультразвуковою обробкою графiту Yukhymchuk, V. O. Valakh, M. Ya. Hreshchuk, O. M. Havrylyuk, Ye. O. Yanchuk, I. B. Yefanov, A. V. Arif, R. N. Rozhin, A. G. Skoryk, M. A. graphene Raman spectroscopy ultrasound treatment vacancy and edge defects scanning electron microscopy - A possibility to obtain graphene and graphene layers with the help of the ultrasound (US) treatment of pyrolytic graphite in an N-methyl pyrrolidone (NMP) solution has been demonstrated. Raman spectroscopy is confirmed to be an effective method for monitoring the graphite transformation into graphene. By varying the time of the ultrasonic treatment of pyrolytic graphite in the NMP solution, optimum regimes for the fabrication of graphene flakes with various numbers of layers are determined. In particular, the US treatment for 5 h is shown to be sufficient for producing a colloidal solution of graphene flakes, most of which are single-layered. It is shown that the longer US treatment results in larger intensities of Raman bands D and D′, which testifies to a larger number of defects in the graphene layers. The average distances between defects are estimated for various times of US treatment. The influence of vacancy and edge defects on the intensity band ratio lD/lD′ is analyzed. Vacancies are found to be the prevailing type of defects in the graphene flakes. В роботi продемонстрована можливiсть отримання графену та шарiв на його основi за допомогою ультразвукової (УЗ) обробки пiролiтичного графiту в розчинi N-метiл пiролiдону (NMP). Пiдтверджено, що ефективним методом дiагностики процесу трансформацiї графiту в графен є раманiвська спектроскопiя. Варiюванням часу УЗ обробки пiролiтичного графiту в розчинi NMP встановленi оптимальнi режими отримання графенових флейкiв з рiзною кiлькiстю шарiв. Зокрема, показано, що УЗ обробка протягом 5 годин достатня для отримання колоїдного розчину графенових флейкiв, бiльшiсть з яких є одношаровими. Показано, що зi збiльшенням часу УЗ обробки зростає iнтенсивнiсть раманiвських смуг D та D′, що свiдчить про зростання кiлькостi дефектiв в графенових шарах. Оцiнено середнi вiдстанi мiж дефектами при рiзних часах УЗ обробки. Проаналiзовано вплив вакансiйних та крайових дефектiв на величину спiввiдношення lD/lD′ смуг та встановлено, що переважаючим типом дефектiв в графенових флейках є вакансiї. Publishing house "Academperiodika" 2018-12-15 Article Article Peer-reviewed Рецензована стаття application/pdf https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2018683 10.15407/ujpe62.05.0432 Ukrainian Journal of Physics; Vol. 62 No. 5 (2017); 432 Український фізичний журнал; Том 62 № 5 (2017); 432 2071-0194 2071-0186 10.15407/ujpe62.05 en https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2018683/807 Copyright (c) 2018 Bogolyubov Institute for Theoretical Physics, National Academy of Sciences of Ukraine |
| institution |
Ukrainian Journal of Physics |
| collection |
OJS |
| language |
English |
| topic |
graphene Raman spectroscopy ultrasound treatment vacancy and edge defects scanning electron microscopy - |
| spellingShingle |
graphene Raman spectroscopy ultrasound treatment vacancy and edge defects scanning electron microscopy - Yukhymchuk, V. O. Valakh, M. Ya. Hreshchuk, O. M. Havrylyuk, Ye. O. Yanchuk, I. B. Yefanov, A. V. Arif, R. N. Rozhin, A. G. Skoryk, M. A. Властивостi графенових флейкiв, отриманих ультразвуковою обробкою графiту |
| topic_facet |
graphene Raman spectroscopy ultrasound treatment vacancy and edge defects scanning electron microscopy - |
| format |
Article |
| author |
Yukhymchuk, V. O. Valakh, M. Ya. Hreshchuk, O. M. Havrylyuk, Ye. O. Yanchuk, I. B. Yefanov, A. V. Arif, R. N. Rozhin, A. G. Skoryk, M. A. |
| author_facet |
Yukhymchuk, V. O. Valakh, M. Ya. Hreshchuk, O. M. Havrylyuk, Ye. O. Yanchuk, I. B. Yefanov, A. V. Arif, R. N. Rozhin, A. G. Skoryk, M. A. |
| author_sort |
Yukhymchuk, V. O. |
| title |
Властивостi графенових флейкiв, отриманих ультразвуковою обробкою графiту |
| title_short |
Властивостi графенових флейкiв, отриманих ультразвуковою обробкою графiту |
| title_full |
Властивостi графенових флейкiв, отриманих ультразвуковою обробкою графiту |
| title_fullStr |
Властивостi графенових флейкiв, отриманих ультразвуковою обробкою графiту |
| title_full_unstemmed |
Властивостi графенових флейкiв, отриманих ультразвуковою обробкою графiту |
| title_sort |
властивостi графенових флейкiв, отриманих ультразвуковою обробкою графiту |
| title_alt |
Properties of Graphene Flakes Obtained by Treating Graphite with Ultrasound |
| description |
A possibility to obtain graphene and graphene layers with the help of the ultrasound (US) treatment of pyrolytic graphite in an N-methyl pyrrolidone (NMP) solution has been demonstrated. Raman spectroscopy is confirmed to be an effective method for monitoring the graphite transformation into graphene. By varying the time of the ultrasonic treatment of pyrolytic graphite in the NMP solution, optimum regimes for the fabrication of graphene flakes with various numbers of layers are determined. In particular, the US treatment for 5 h is shown to be sufficient for producing a colloidal solution of graphene flakes, most of which are single-layered. It is shown that the longer US treatment results in larger intensities of Raman bands D and D′, which testifies to a larger number of defects in the graphene layers. The average distances between defects are estimated for various times of US treatment. The influence of vacancy and edge defects on the intensity band ratio lD/lD′ is analyzed. Vacancies are found to be the prevailing type of defects in the graphene flakes. |
| publisher |
Publishing house "Academperiodika" |
| publishDate |
2018 |
| url |
https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2018683 |
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| first_indexed |
2023-03-24T08:56:36Z |
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2023-03-24T08:56:36Z |
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