Tailoring the oxygen content of graphene oxide by IR laser irradiation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F18%3A00492091" target="_blank" >RIV/61389005:_____/18:00492091 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1007/s00339-018-1956-z" target="_blank" >http://dx.doi.org/10.1007/s00339-018-1956-z</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s00339-018-1956-z" target="_blank" >10.1007/s00339-018-1956-z</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Tailoring the oxygen content of graphene oxide by IR laser irradiation

Popis výsledku v původním jazyce

Graphene oxide (GO) foils, synthesized with the Hummers' method, were IR laser treated in air and under vacuum at some laser fluences (300 and 600 mJ/cm(2) in air and 200 mJ/cm(2) under vacuum). Depending on the laser fluence and the used environment, it was possible to control the oxidation or reduction degree of GO foils. The evolution of the structural and compositional characteristics of the as-prepared GO films was examined through different physical characterization techniques. In particular, scanning electron microscopy (SEM), surface profilometry, energy-dispersive X-ray spectroscopy (EDX), Rutherford backscattering spectrometry (RBS) and X-ray photoelectron spectroscopy (XPS) were used. A preliminary Raman analysis was also carried out on some GO foils. The results suggest the gradual restoration of sp (2) clusters within the sp (3) matrix under vacuum or in air at high laser fluences. In these conditions, the partial reestablishment of planarity and an increase in the D/G intensity ratio are also observed. In air, at low laser fluences, the IR laser irradiation causes GO films oxidation, increase in roughness and greater exfoliation availability. The useful deduced information about morphology and composition make the IR laser treatment a simple method for controlling the physical properties of GO film by tailoring the oxygen functional groups, and consequently, for the production of tailor-made highly conductive and defect-free graphene-like materials or GO composites with metals and organic molecules or GO doped with heteroatoms.

Název v anglickém jazyce

Tailoring the oxygen content of graphene oxide by IR laser irradiation

Popis výsledku anglicky

Graphene oxide (GO) foils, synthesized with the Hummers' method, were IR laser treated in air and under vacuum at some laser fluences (300 and 600 mJ/cm(2) in air and 200 mJ/cm(2) under vacuum). Depending on the laser fluence and the used environment, it was possible to control the oxidation or reduction degree of GO foils. The evolution of the structural and compositional characteristics of the as-prepared GO films was examined through different physical characterization techniques. In particular, scanning electron microscopy (SEM), surface profilometry, energy-dispersive X-ray spectroscopy (EDX), Rutherford backscattering spectrometry (RBS) and X-ray photoelectron spectroscopy (XPS) were used. A preliminary Raman analysis was also carried out on some GO foils. The results suggest the gradual restoration of sp (2) clusters within the sp (3) matrix under vacuum or in air at high laser fluences. In these conditions, the partial reestablishment of planarity and an increase in the D/G intensity ratio are also observed. In air, at low laser fluences, the IR laser irradiation causes GO films oxidation, increase in roughness and greater exfoliation availability. The useful deduced information about morphology and composition make the IR laser treatment a simple method for controlling the physical properties of GO film by tailoring the oxygen functional groups, and consequently, for the production of tailor-made highly conductive and defect-free graphene-like materials or GO composites with metals and organic molecules or GO doped with heteroatoms.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20506 - Coating and films

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Applied Physics A - Materials Science & Processing

ISSN

0947-8396

e-ISSN

—

Svazek periodika

124

Číslo periodika v rámci svazku

8

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

12

Strana od-do

—

Kód UT WoS článku

000439391800002

EID výsledku v databázi Scopus

2-s2.0-85050303752