Synthesis and properties of free-standing graphene nanosheets at atmospheric pressure conditions

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F18%3A00107909" target="_blank" >RIV/00216224:14310/18:00107909 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Synthesis and properties of free-standing graphene nanosheets at atmospheric pressure conditions

Popis výsledku v původním jazyce

Last decade two-dimensional carbon-based nanostructures such as graphene nanosheets, nanoribbons and carbon nanowalls have attracted much research interest, due to their remarkable properties combining high mechanical strength and flexibility, exceptional electronic and thermal conductivity, high carrier mobility and optical transparency. Potential application in different fields of science and technology include hydrogen and energy storage, reinforcement of polymer composites, electronics, electrochemical devices, or gas sensors. Our deposition process reported in this work is based on injecting ethanol vapours through a microwave plasma environment, where decomposition of ethanol molecules takes place. We used microwave plasma torch discharge (2.45 GHz, ~200 W, Figure 1) operating at atmospheric pressure conditions to synthesize graphene nanosheets with rectangular shape and typical size of hundreds of nanometres. Argon flowing through the central channel of the nozzle was used as the working gas to ignite the discharge. Mixture consisting of ethanol vapours and additional argon flow was delivered into plasma environment by outer channel of the nozzle. Wide range of deposition conditions resulted in synthesis of different types of carbon material. However, mastering the deposition process by setting specific set of deposition conditions led to synthesis of graphene sheets (Figure 2). Created samples were analysed by scanning electron microscopy, Raman spectroscopy and X-ray photoelectron spectroscopy to probe the morphological, chemical and microstructural features of the produced material.

Název v anglickém jazyce

Synthesis and properties of free-standing graphene nanosheets at atmospheric pressure conditions

Popis výsledku anglicky

Last decade two-dimensional carbon-based nanostructures such as graphene nanosheets, nanoribbons and carbon nanowalls have attracted much research interest, due to their remarkable properties combining high mechanical strength and flexibility, exceptional electronic and thermal conductivity, high carrier mobility and optical transparency. Potential application in different fields of science and technology include hydrogen and energy storage, reinforcement of polymer composites, electronics, electrochemical devices, or gas sensors. Our deposition process reported in this work is based on injecting ethanol vapours through a microwave plasma environment, where decomposition of ethanol molecules takes place. We used microwave plasma torch discharge (2.45 GHz, ~200 W, Figure 1) operating at atmospheric pressure conditions to synthesize graphene nanosheets with rectangular shape and typical size of hundreds of nanometres. Argon flowing through the central channel of the nozzle was used as the working gas to ignite the discharge. Mixture consisting of ethanol vapours and additional argon flow was delivered into plasma environment by outer channel of the nozzle. Wide range of deposition conditions resulted in synthesis of different types of carbon material. However, mastering the deposition process by setting specific set of deposition conditions led to synthesis of graphene sheets (Figure 2). Created samples were analysed by scanning electron microscopy, Raman spectroscopy and X-ray photoelectron spectroscopy to probe the morphological, chemical and microstructural features of the produced material.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

<a href="/cs/project/GA18-08520S" target="_blank" >GA18-08520S: Studium procesu nukleace dvourozměrných uhlíkových nanostruktur v mikrovlnném plazmatu</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2018

Kód důvěrnosti údajů

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