In-situ Vis/NIR spectroelectrochemistry of single-walled carbon nanotubes enriched with (6,5) tubes

Otakar Frank, Ladislav Kavan, Alexander A. Green, Mark C Hersam, Lothar Dunsch

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

An in-situ optical Vis/NIR spectroelectrochemistry study was performed on single-walled carbon nanotubes (CoMoCat) enriched with (6,5) tubes via density-gradient ultracentrifugation. Thin semitransparent solid films were prepared from the solution of sorted nanotubes by vacuum filtration and purification with water. Despite the appearance of some bundling of the nanotubes during this procedure, peaks corresponding to optical transitions of tubes with distinct chiralities may be observed in the spectra. The effects of electrochemical redox doping on the electronic state of the nanotubes were investigated in an electrode potential window between -2 and +1.7 V vs. Ag-pseudoreference electrode. The bleaching of ΔE11S and ΔE22S optical transitions is traced for particular tubes, which allows a partial quantification of changes in the electronic density of states (DOS) caused by their filling with electrons or holes.

Original languageEnglish
Pages (from-to)2239-2242
Number of pages4
JournalPhysica Status Solidi (B) Basic Research
Volume245
Issue number10
DOIs
Publication statusPublished - Oct 2008

Fingerprint

Spectroelectrochemistry
Single-walled carbon nanotubes (SWCN)
Nanotubes
nanotubes
Optical transitions
carbon nanotubes
tubes
optical transition
Electrodes
Electronic density of states
electrodes
Chirality
Electronic states
bleaching
Bleaching
chirality
electronics
purification
Purification
Doping (additives)

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

In-situ Vis/NIR spectroelectrochemistry of single-walled carbon nanotubes enriched with (6,5) tubes. / Frank, Otakar; Kavan, Ladislav; Green, Alexander A.; Hersam, Mark C; Dunsch, Lothar.

In: Physica Status Solidi (B) Basic Research, Vol. 245, No. 10, 10.2008, p. 2239-2242.

Research output: Contribution to journalArticle

Frank, Otakar ; Kavan, Ladislav ; Green, Alexander A. ; Hersam, Mark C ; Dunsch, Lothar. / In-situ Vis/NIR spectroelectrochemistry of single-walled carbon nanotubes enriched with (6,5) tubes. In: Physica Status Solidi (B) Basic Research. 2008 ; Vol. 245, No. 10. pp. 2239-2242.
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