In-situ thermal Raman spectroscopy of single-layer graphene on different substrates

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081731%3A_____%2F23%3A00574279" target="_blank" >RIV/68081731:_____/23:00574279 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S2352492823006128" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2352492823006128</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.mtcomm.2023.105921" target="_blank" >10.1016/j.mtcomm.2023.105921</a>

Result language
angličtina
Original language name
In-situ thermal Raman spectroscopy of single-layer graphene on different substrates
Original language description
In this study, we discovered through Raman spectroscopy that single-layered graphene is not destroyed at 600 °C generally but the decomposition temperature depends linearly on the coefficient of thermal expansion (CTE) of the substrate. Moreover, we showed that there is a different phenomenon behind the decomposition of graphene in air and in vacuum. While in both environments, decomposition is initiated by the prolongation of the C-C bonds, in air the increased strain raises the graphene reactivity with oxygen, therefore it is the oxygen which destroys graphene whereas in a vacuum the strain alone causes the decomposition. The maximal strain for the single-layered graphene was measured for both environments. The experiments were carried out on 8 different substrates with very different CTEs. We also calculated the Raman shift thermal coefficient for graphene on Si, Pt, Au, and Cu and discussed the changes in graphene through the very wide temperature changes (−196 to 600 °C).
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)

Project
<a href="/en/project/GA22-34286S" target="_blank" >GA22-34286S: Probing electron scattering phenomena of two-dimensional crystalline materials at very low energies</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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