Electrochemical Tuning of Electronic Structure of C60 and C70 Fullerene Peapods: In situ Visible Near-Infrared and Raman Study.

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Electrochemical Tuning of Electronic Structure of C60 and C70 Fullerene Peapods: In situ Visible Near-Infrared and Raman Study.

Popis výsledku v původním jazyce

The population of valence-band electronic states of fullerene peapods (C60@SWCNT and C70@SWCNT) was tuned electrochemically in 0.2 M LiClO4 + acetonitrile. Electrochemistry of peapods is dominated by their capacitive charging without distinct faradaic processes. In-situ Vis-NIR spectra of C60/C70 peapods are similar to those of empty nanotubes. Electrochemical charging causes reversible bleaching of the transitions between Van Hove singularities. This bleaching is mirrored by quenching of resonance Raman spectra in the regions of tube-related modes. The Raman modes of intratubular C60 exhibit considerable intensity increase upon anodic doping of peapods, but these Raman modes are not enhanced at cathodic charging. In contrast to that, C70@SWCNT does not show any enhancement of Raman intensities at both anodic and cathodic potentials. All the relevant Raman modes of intratubular C70 show symmetric charge-transfer bleaching as the tube-related modes.

Název v anglickém jazyce

Electrochemical Tuning of Electronic Structure of C60 and C70 Fullerene Peapods: In situ Visible Near-Infrared and Raman Study.

Popis výsledku anglicky

The population of valence-band electronic states of fullerene peapods (C60@SWCNT and C70@SWCNT) was tuned electrochemically in 0.2 M LiClO4 + acetonitrile. Electrochemistry of peapods is dominated by their capacitive charging without distinct faradaic processes. In-situ Vis-NIR spectra of C60/C70 peapods are similar to those of empty nanotubes. Electrochemical charging causes reversible bleaching of the transitions between Van Hove singularities. This bleaching is mirrored by quenching of resonance Raman spectra in the regions of tube-related modes. The Raman modes of intratubular C60 exhibit considerable intensity increase upon anodic doping of peapods, but these Raman modes are not enhanced at cathodic charging. In contrast to that, C70@SWCNT does not show any enhancement of Raman intensities at both anodic and cathodic potentials. All the relevant Raman modes of intratubular C70 show symmetric charge-transfer bleaching as the tube-related modes.

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

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2003

Kód důvěrnosti údajů

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

Název periodika

Journal of Physical Chemistry. B

ISSN

1089-5647

e-ISSN

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Svazek periodika

107

Číslo periodika v rámci svazku

N/A

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

7666-7675

Kód UT WoS článku

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EID výsledku v databázi Scopus

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