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 language | English |
|---|---|
| Pages (from-to) | 2239-2242 |
| Number of pages | 4 |
| Journal | Physica Status Solidi (B) Basic Research |
| Volume | 245 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - Oct 2008 |
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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 journal › Article
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TY - JOUR
T1 - In-situ Vis/NIR spectroelectrochemistry of single-walled carbon nanotubes enriched with (6,5) tubes
AU - Frank, Otakar
AU - Kavan, Ladislav
AU - Green, Alexander A.
AU - Hersam, Mark C
AU - Dunsch, Lothar
PY - 2008/10
Y1 - 2008/10
N2 - 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.
AB - 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.
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U2 - 10.1002/pssb.200879609
DO - 10.1002/pssb.200879609
M3 - Article
VL - 245
SP - 2239
EP - 2242
JO - Physica Status Solidi (B): Basic Research
JF - Physica Status Solidi (B): Basic Research
SN - 0370-1972
IS - 10
ER -