About: Extreme electrochemical doping of a graphene-polyelectrolyte heterostructure

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About: Extreme electrochemical doping of a graphene-polyelectrolyte heterostructure Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	A doped state of heterostructure, based on chemical vapour deposition grown graphene and polyelectrolytes (polyallylamine hydrochloride and polyacrylic acid), has been studied. The doping was realized electrochemically by application of an electrode potential in LiClO4-acetonitrile electrolyte solution. Our new setup allowed us to achieve extreme doping levels for both positive and negative electrode potentials. The extreme doping of graphene was demonstrated by a large shift of the G mode frequency in the Raman spectrum. In addition a significant enhancement of the G mode at large positive and also negative electrode potentials has been experimentally observed. The G mode intensity enhancement was attributed to cancelling of a part of the quantum Raman pathways thus reducing the destructive quantum interference effect. Since this effect only occurs if the Fermi level achieves half of the laser excitation energy, experimental observation of this phenomenon also confirms the extreme doping levels of graphene. A doped state of heterostructure, based on chemical vapour deposition grown graphene and polyelectrolytes (polyallylamine hydrochloride and polyacrylic acid), has been studied. The doping was realized electrochemically by application of an electrode potential in LiClO4-acetonitrile electrolyte solution. Our new setup allowed us to achieve extreme doping levels for both positive and negative electrode potentials. The extreme doping of graphene was demonstrated by a large shift of the G mode frequency in the Raman spectrum. In addition a significant enhancement of the G mode at large positive and also negative electrode potentials has been experimentally observed. The G mode intensity enhancement was attributed to cancelling of a part of the quantum Raman pathways thus reducing the destructive quantum interference effect. Since this effect only occurs if the Fermi level achieves half of the laser excitation energy, experimental observation of this phenomenon also confirms the extreme doping levels of graphene. (en)
Title	Extreme electrochemical doping of a graphene-polyelectrolyte heterostructure Extreme electrochemical doping of a graphene-polyelectrolyte heterostructure (en)
skos:prefLabel	Extreme electrochemical doping of a graphene-polyelectrolyte heterostructure Extreme electrochemical doping of a graphene-polyelectrolyte heterostructure (en)
skos:notation	RIV/61388955:_____/14:00434833!RIV15-GA0-61388955
http://linked.open...avai/riv/aktivita	I P
http://linked.open...avai/riv/aktivity	I, P(GAP208/12/1062), P(TA03010037)
http://linked.open...iv/cisloPeriodika	22
http://linked.open...vai/riv/dodaniDat	2015
http://linked.open...aciTvurceVysledku	Komínková, Zuzana Kalbáč, Martin
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav fyzikální chemie J. Heyrovského AV ČR, v.v.i.
http://linked.open...dnocenehoVysledku	16249
http://linked.open...ai/riv/idVysledku	RIV/61388955:_____/14:00434833
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	electrochemistry; graphene; polyelectrolytes (en)
http://linked.open.../riv/klicoveSlovo	graphene electrochemistry polyelectrolytes
http://linked.open...odStatuVydavatele	GB - Spojené království Velké Británie a Severního Irska
http://linked.open...ontrolniKodProRIV	[301C370D7158]
http://linked.open...i/riv/nazevZdroje	RSC Advances
http://linked.open...in/vavai/riv/obor	CG
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	2 (xsd:int)
http://linked.open...vavai/riv/projekt	Carbon nanostructures for sensor applications. Spectroscopy and spectroelectrochemistry of graphene and graphene multilayers
http://linked.open...UplatneniVysledku	2014
http://linked.open...v/svazekPeriodika	4
http://linked.open...iv/tvurceVysledku	Kalbáč, Martin Komínková, Zuzana
http://linked.open...ain/vavai/riv/wos	000332469500039
issn	2046-2069
number of pages	6 (xsd:int)
http://bibframe.org/vocab/doi	10.1039/c3ra44780d

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