Study of graphene layer growth on dielectric substrate in microwave plasma torch at atmospheric pressure

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F20%3A00114284" target="_blank" >RIV/00216224:14310/20:00114284 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216305:26620/20:PU140208

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0925963519308271" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0925963519308271</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.diamond.2020.107798" target="_blank" >10.1016/j.diamond.2020.107798</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Study of graphene layer growth on dielectric substrate in microwave plasma torch at atmospheric pressure

Popis výsledku v původním jazyce

The initial stage of graphene layer deposition on silicon oxide substrate by ethanol decomposition in dual-channel microwave plasma torch at atmospheric pressure was studied in dependence on precursor flow rate and delivered microwave power. Depending on ethanol flow rate and substrate temperature, horizontally or vertically aligned graphene nanosheets with various density could be prepared directly on dielectric substrate. In the regime with high microwave power, above 400 W, mixture of amorphous carbon particles and graphene sheets was deposited on the substrate. Prepared layers were analyzed by scanning electron microscopy (SEM), Raman spectroscopy and X-ray photoelectron spectroscopy (XPS). The microwave plasma diagnostics was carried out using optical emission spectroscopy (OES). The sample analysis showed increasing density of horizontally aligned carbon nanosheets with increasing ethanol flow rate and their delamination and transition into vertically aligned graphene sheets with increasing substrate temperature. The Raman spectroscopy analysis of layers showed presence of D (1345 cm(-1)), G (1585 cm(-1)) and 2D (2685 cm(-1)) peaks with 2D/G ratio of 1.59 and full width at half maximum (FWHM) of 2D peak was 42 cm(-1), corresponding to few layer graphene structure. In case of amorphous nanoparticles deposition, the D* peak at 1210 cm(-1) and D** at 1500 seem-1 was observed in Raman spectra with D/G ratio of 1.19 and Cls XPS spectra of carbon contained 20.4 at.% of spa carbon phase in comparison to 8.3 at.% in case of graphene nanosheets layer. High D/G ratio, up to 3.5, and low intensity 2D band was characteristic for vertically aligned graphene nanosheets layers. The possibility to influence density and size of graphene nanosheets on substrate represents promising alternative for future deposition of graphene on arbitrary substrate.

Název v anglickém jazyce

Study of graphene layer growth on dielectric substrate in microwave plasma torch at atmospheric pressure

Popis výsledku anglicky

The initial stage of graphene layer deposition on silicon oxide substrate by ethanol decomposition in dual-channel microwave plasma torch at atmospheric pressure was studied in dependence on precursor flow rate and delivered microwave power. Depending on ethanol flow rate and substrate temperature, horizontally or vertically aligned graphene nanosheets with various density could be prepared directly on dielectric substrate. In the regime with high microwave power, above 400 W, mixture of amorphous carbon particles and graphene sheets was deposited on the substrate. Prepared layers were analyzed by scanning electron microscopy (SEM), Raman spectroscopy and X-ray photoelectron spectroscopy (XPS). The microwave plasma diagnostics was carried out using optical emission spectroscopy (OES). The sample analysis showed increasing density of horizontally aligned carbon nanosheets with increasing ethanol flow rate and their delamination and transition into vertically aligned graphene sheets with increasing substrate temperature. The Raman spectroscopy analysis of layers showed presence of D (1345 cm(-1)), G (1585 cm(-1)) and 2D (2685 cm(-1)) peaks with 2D/G ratio of 1.59 and full width at half maximum (FWHM) of 2D peak was 42 cm(-1), corresponding to few layer graphene structure. In case of amorphous nanoparticles deposition, the D* peak at 1210 cm(-1) and D** at 1500 seem-1 was observed in Raman spectra with D/G ratio of 1.19 and Cls XPS spectra of carbon contained 20.4 at.% of spa carbon phase in comparison to 8.3 at.% in case of graphene nanosheets layer. High D/G ratio, up to 3.5, and low intensity 2D band was characteristic for vertically aligned graphene nanosheets layers. The possibility to influence density and size of graphene nanosheets on substrate represents promising alternative for future deposition of graphene on arbitrary substrate.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

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

2020

Kód důvěrnosti údajů

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

Název periodika

Diamond and Related Materials

ISSN

0925-9635

e-ISSN

1879-0062

Svazek periodika

105

Číslo periodika v rámci svazku

May 2020

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

9

Strana od-do

1-9

Kód UT WoS článku

000540291200014

EID výsledku v databázi Scopus

2-s2.0-85081563445