Laser-ablation-assisted SF6 decomposition for extensive and controlled fluorination of graphene

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F19%3A00517285" target="_blank" >RIV/61388955:_____/19:00517285 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/19:10398953

Výsledek na webu

<a href="http://hdl.handle.net/11104/0302589" target="_blank" >http://hdl.handle.net/11104/0302589</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.carbon.2019.01.049" target="_blank" >10.1016/j.carbon.2019.01.049</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Laser-ablation-assisted SF6 decomposition for extensive and controlled fluorination of graphene

Popis výsledku v původním jazyce

We present a safe, clean, convenient and easy-to-control method for extensive fluorination of graphene using laser-ablation-assisted decomposition of gaseous SF6 molecules. The decomposition process is based on irradiation of a silicon target using a Nd:YAG laser (532 nm) in an SF6 atmosphere. The reactive species produced in the plume above the silicon target are consequently responsible for fluorination of graphene placed in proximity to the plume. The applicability of the proposed method is demonstrated on fluorination of CVD-grown graphene on copper foil. Samples with different fluorination levels were evaluated using both X-ray photoelectron spectroscopy and Raman spectroscopy. The influence of the applied number of laser pulses on the nature of the CeF bonds, fluorine and sulphur concentrations, as well as graphene damage, is discussed. The method enables control of fluorine content by simple counting of laser pulses. We show that a fluorination level corresponding to a stoichiometry up to C1.4F can be achieved. The fluorination does not lead to the formation of Cu-F, in contrast to previously published approaches. (c) 2019 Published by Elsevier Ltd.

Název v anglickém jazyce

Laser-ablation-assisted SF6 decomposition for extensive and controlled fluorination of graphene

Popis výsledku anglicky

We present a safe, clean, convenient and easy-to-control method for extensive fluorination of graphene using laser-ablation-assisted decomposition of gaseous SF6 molecules. The decomposition process is based on irradiation of a silicon target using a Nd:YAG laser (532 nm) in an SF6 atmosphere. The reactive species produced in the plume above the silicon target are consequently responsible for fluorination of graphene placed in proximity to the plume. The applicability of the proposed method is demonstrated on fluorination of CVD-grown graphene on copper foil. Samples with different fluorination levels were evaluated using both X-ray photoelectron spectroscopy and Raman spectroscopy. The influence of the applied number of laser pulses on the nature of the CeF bonds, fluorine and sulphur concentrations, as well as graphene damage, is discussed. The method enables control of fluorine content by simple counting of laser pulses. We show that a fluorination level corresponding to a stoichiometry up to C1.4F can be achieved. The fluorination does not lead to the formation of Cu-F, in contrast to previously published approaches. (c) 2019 Published by Elsevier Ltd.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

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

2019

Kód důvěrnosti údajů

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

Název periodika

Carbon

ISSN

0008-6223

e-ISSN

—

Svazek periodika

145

Číslo periodika v rámci svazku

APR 2019

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

7

Strana od-do

419-425

Kód UT WoS článku

000466073000044

EID výsledku v databázi Scopus

2-s2.0-85060351612