Graphene field effect transistor as a probe of electronic structure and charge transfer at organic molecule?graphene interfaces

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F15%3A00438498" target="_blank" >RIV/61388955:_____/15:00438498 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1039/c4nr05390g" target="_blank" >http://dx.doi.org/10.1039/c4nr05390g</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/c4nr05390g" target="_blank" >10.1039/c4nr05390g</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Graphene field effect transistor as a probe of electronic structure and charge transfer at organic molecule?graphene interfaces

Popis výsledku v původním jazyce

The electronic structure of physisorbed molecules containing aromatic nitrogen heterocycles (triazine and melamine) on graphene is studied using a combination of electronic transport, X-ray photoemission spectroscopy and density functional theory calculations. The interfacial electronic structure and charge transfer of weakly coupled molecules on graphene is found to be governed by work function differences, molecular dipole moments and polarization effects. We demonstrate that molecular depolarizationplays a significant role in these charge transfer mechanisms even at submonolayer coverage, particularly for molecules which possess strong dipoles. Electronic transport measurements show a reduction of graphene conductivity and charge carrier mobility upon the adsorption of the physisorbed molecules. This effect is attributed to the formation of additional electron scattering sites in graphene by the molecules and local molecular electric fields. Our results show that adsorbed molecules

Název v anglickém jazyce

Graphene field effect transistor as a probe of electronic structure and charge transfer at organic molecule?graphene interfaces

Popis výsledku anglicky

The electronic structure of physisorbed molecules containing aromatic nitrogen heterocycles (triazine and melamine) on graphene is studied using a combination of electronic transport, X-ray photoemission spectroscopy and density functional theory calculations. The interfacial electronic structure and charge transfer of weakly coupled molecules on graphene is found to be governed by work function differences, molecular dipole moments and polarization effects. We demonstrate that molecular depolarizationplays a significant role in these charge transfer mechanisms even at submonolayer coverage, particularly for molecules which possess strong dipoles. Electronic transport measurements show a reduction of graphene conductivity and charge carrier mobility upon the adsorption of the physisorbed molecules. This effect is attributed to the formation of additional electron scattering sites in graphene by the molecules and local molecular electric fields. Our results show that adsorbed molecules

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CF - Fyzikální chemie a teoretická chemie

OECD FORD obor

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Projekt

<a href="/cs/project/LL1301" target="_blank" >LL1301: Od grafenových hybridních nanostruktur k ekologické elektronice</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

Kód důvěrnosti údajů

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

Název periodika

Nanoscale

ISSN

2040-3364

e-ISSN

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Svazek periodika

7

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

8

Strana od-do

1471-1478

Kód UT WoS článku

000347374600025

EID výsledku v databázi Scopus

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