Thermally induced mechanical strain of graphene on copper and other substrates

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F23%3A00571143" target="_blank" >RIV/61388955:_____/23:00571143 - isvavai.cz</a>
Result on the web
<a href="https://hdl.handle.net/11104/0342435" target="_blank" >https://hdl.handle.net/11104/0342435</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jpcs.2023.111371" target="_blank" >10.1016/j.jpcs.2023.111371</a>

Result language
angličtina
Original language name
Thermally induced mechanical strain of graphene on copper and other substrates
Original language description
Raman spectroscopy is employed to investigate the temperature dependence of the phonon frequencies of the G and 2D modes of monolayer graphene grown on copper foil by chemical vapor deposition. Both the G and 2D modes exhibit significant red shift as temperature increases, and the extracted values of the temperature coefficients of the G and 2D modes are about −0.07 cm−1K−1 and −0.15 cm−1K−1, respectively. In addition, we extracted the intrinsic Raman shift of the G mode by determining the thermally induced mechanical strain that is transmitted from the copper substrate to graphene. The extracted intrinsic G mode frequency shift is in very good agreement with earlier reported first principles calculations. Finally, we have calculated the temperature dependence of the substrate-induced strain on graphene when it is deposited or grown to various technologically important substrates, showing that strains as high as 1.1% can be imparted to graphene within a temperature range of 500 K.
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
10403 - Physical chemistry

Project
<a href="/en/project/GX20-08633X" target="_blank" >GX20-08633X: ÅrchitectRonics of Two-dimensional crystals via synergy of chiral electro-chemical and opto-electronic concepts on Å-scale</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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