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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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).

Název v anglickém jazyce

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

Popis výsledku anglicky

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).

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)

Projekt

<a href="/cs/project/GA22-34286S" target="_blank" >GA22-34286S: Zkoumání rozptylových jevů elektronů ve dvourozměrných krystalických materiálech při velmi nízkých energiích</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Materials Today Communications

ISSN

2352-4928

e-ISSN

2352-4928

Svazek periodika

35

Číslo periodika v rámci svazku

June

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

9

Strana od-do

105921

Kód UT WoS článku

001042084800001

EID výsledku v databázi Scopus

2-s2.0-85151427942