Charge Transfer at Carbon Nanotubes with Encapsulated C60 and C70 (Peapods).

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

Charge Transfer at Carbon Nanotubes with Encapsulated C60 and C70 (Peapods).

Popis výsledku v původním jazyce

Charge-transfer on fullerene peapods (C60@SWCNT and C70@SWCNT) was studied by electrochemistry in 0.2 M LiClO4 + acetonitrile and in 1-butyl-3-methylimidazolium tetrafluoroborate (ionic liquid). This method allows easy and precise control of the population of electronic states near the Fermi level. Electrochemistry of peapods is dominated by capacitive double-layer charging, analogous to that of empty tubes. No fullerene-related faradaic processes are detectable in peapods. Vis-NIR spectroelectrochemistry points to reversible and fast bleaching of the electronic transitions between Van Hove singularities, which also causes reversible quenching of resonance Raman scattering of both radial breathing and tangential modes of SWCNT. Anodic charging of C60@SWCNT leads to intensity enhancement of the C60 Raman modes. This 'anodic enhancement' is not reproduced in C70@SWCNT. All the relevant modes of C70-peapods show the normal symmetric charge-transfer bleaching as the tube-related lines.

Název v anglickém jazyce

Charge Transfer at Carbon Nanotubes with Encapsulated C60 and C70 (Peapods).

Popis výsledku anglicky

Charge-transfer on fullerene peapods (C60@SWCNT and C70@SWCNT) was studied by electrochemistry in 0.2 M LiClO4 + acetonitrile and in 1-butyl-3-methylimidazolium tetrafluoroborate (ionic liquid). This method allows easy and precise control of the population of electronic states near the Fermi level. Electrochemistry of peapods is dominated by capacitive double-layer charging, analogous to that of empty tubes. No fullerene-related faradaic processes are detectable in peapods. Vis-NIR spectroelectrochemistry points to reversible and fast bleaching of the electronic transitions between Van Hove singularities, which also causes reversible quenching of resonance Raman scattering of both radial breathing and tangential modes of SWCNT. Anodic charging of C60@SWCNT leads to intensity enhancement of the C60 Raman modes. This 'anodic enhancement' is not reproduced in C70@SWCNT. All the relevant modes of C70-peapods show the normal symmetric charge-transfer bleaching as the tube-related lines.

Druh

C - Kapitola v odborné knize

CEP obor

CF - Fyzikální chemie a teoretická chemie

OECD FORD obor

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Projekt

<a href="/cs/project/IAA4040306" target="_blank" >IAA4040306: Přenos náboje v organizovaných supramolekulárních soustavách fullerenů</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>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 knihy nebo sborníku

Fullerenes and Nanotubes.

ISBN

1-56677-397-0

Počet stran výsledku

10

Strana od-do

323-332

Počet stran knihy

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Název nakladatele

The Electrochemical Society

Místo vydání

Pennington

Kód UT WoS kapitoly

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