About: Doping of C60 fullerene peapods with lithium: Raman spectroscopic and Raman spectroelectrochemical studies     Goto   Sponge   NotDistinct   Permalink

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  • Ramanská a in-situ Raman spektroelektrochemická spektroskopie byla použita pro studium lithiovou parou dopovaných C60@SWCNTs (paepodů). Silné dopování bylo potvrzeno vyhasnutím radiálního dýchacího modu (RBM) a zmenšením intensity tangenciálního (TG) modu o dva řády. Důsledkem dopování peapodů pomocí Li byl posun Ag(2) modu inratubulárního C60 o 27 cm-1 a změna rezonanční podmínky fullerenů uvnitř tub. Na rozdíl od dopování draslíkovou parou, nebyl při dopování Li pozorován posun TG pásu směrem k nižším frekvencím. Li dopované peapody zůstávaly částečně dopované i po vystavení vlhkému vzduchu. Toto bylo potvrzeno menší intensitou vibračních modů tuby a fullerenu a dále změnou tvaru RBM pásu ve srovnání s původním nedopovaným vzorkem. Pás Ag(2) modu intratubulárního fullerenu dále nebylo možné rozlišit po kontaktu Li dopovaného vzorku s vodou. Důvodem zbytkového dopování se zdá být inserce lithia dovnitř peapodů a jeho silná interakce s intratubulárním fullerenem. (cs)
  • Raman spectroscopy and in-situ Raman spectroelectrochemistry were applied to study the lithium vapor doping of C60@SWCNTs (peapods). A strong degree of doping was proved by the vanishing of the SWCNT’s radial breathing mode (RBM) and by the attenuation of the tangential (TG) band intensity by two orders of magnitude. This Li doping causes a downshift of the Ag(2) mode of the intratubular C60 by 27 cm-1 and changes the resonance condition of encapsulated fullerene. In contrast to potassium vapor doping, the strong downshift of the frequency of the TG band has not been found for Li-doping. The Li vapor treated peapods remained partly doped even if they were exposed to humid air. This has been reflected by a reduced intensity of the nanotube and the fullerene modes and by the change of the shape of the RBM band as compared to that of the undoped sample. The Ag(2) mode of the intratubular fullerene is not resolved after the contact of the Li-doped sample with water.
  • Raman spectroscopy and in-situ Raman spectroelectrochemistry were applied to study the lithium vapor doping of C60@SWCNTs (peapods). A strong degree of doping was proved by the vanishing of the SWCNT’s radial breathing mode (RBM) and by the attenuation of the tangential (TG) band intensity by two orders of magnitude. This Li doping causes a downshift of the Ag(2) mode of the intratubular C60 by 27 cm-1 and changes the resonance condition of encapsulated fullerene. In contrast to potassium vapor doping, the strong downshift of the frequency of the TG band has not been found for Li-doping. The Li vapor treated peapods remained partly doped even if they were exposed to humid air. This has been reflected by a reduced intensity of the nanotube and the fullerene modes and by the change of the shape of the RBM band as compared to that of the undoped sample. The Ag(2) mode of the intratubular fullerene is not resolved after the contact of the Li-doped sample with water. (en)
Title
  • Doping of C60 fullerene peapods with lithium: Raman spectroscopic and Raman spectroelectrochemical studies
  • Dopování C60 fullerenových peapodů pomocí lithia: Ramanská a in-situ Raman spektroelektrochemická studie (cs)
  • Doping of C60 fullerene peapods with lithium: Raman spectroscopic and Raman spectroelectrochemical studies (en)
skos:prefLabel
  • Doping of C60 fullerene peapods with lithium: Raman spectroscopic and Raman spectroelectrochemical studies
  • Dopování C60 fullerenových peapodů pomocí lithia: Ramanská a in-situ Raman spektroelektrochemická studie (cs)
  • Doping of C60 fullerene peapods with lithium: Raman spectroscopic and Raman spectroelectrochemical studies (en)
skos:notation
  • RIV/61388955:_____/08:00310742!RIV09-AV0-61388955
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • P(KJB400400601), Z(AV0Z40400503)
http://linked.open...iv/cisloPeriodika
  • 20
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  • 364229
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  • RIV/61388955:_____/08:00310742
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  • electrochemistry; fullerenes; lithium; Raman spectroscopy (en)
http://linked.open.../riv/klicoveSlovo
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  • DE - Spolková republika Německo
http://linked.open...ontrolniKodProRIV
  • [83B09AFF3D6F]
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  • Chemistry - A European Journal
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  • 14
http://linked.open...iv/tvurceVysledku
  • Dunsch, L.
  • Kalbáč, Martin
  • Kavan, Ladislav
  • Zukalová, Markéta
http://linked.open...ain/vavai/riv/wos
  • 000257822500027
http://linked.open...n/vavai/riv/zamer
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  • 0947-6539
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