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Studying the local character of Raman features of single-walled carbon nanotubes along a bundle using TERS.

Peica N, Thomsen C, Maultzsch J - Nanoscale Res Lett (2011)

Bottom Line: Moreover, using TERS we are able to position different single-walled carbon nanotubes along a bundle, by correlating the observed radial breathing mode (RBM) with the AFM topography at the measuring point.The frequency of the G- mode behaves differently in TERS as compared to far-field Raman.Using the RBM frequency, the diameters of the tubes were calculated and a very good agreement with the G--mode frequency was observed.

View Article: PubMed Central - HTML - PubMed

Affiliation: Institut für Festkörperphysik, Technische Universität Berlin, Hardenbergstr, 36, 10623 Berlin, Germany. peica@physik.tu-berlin.de.

ABSTRACT
Here, we show that the Raman intensity of the G-mode in tip-enhanced Raman spectroscopy (TERS) is strongly dependent on the height of the bundle. Moreover, using TERS we are able to position different single-walled carbon nanotubes along a bundle, by correlating the observed radial breathing mode (RBM) with the AFM topography at the measuring point. The frequency of the G- mode behaves differently in TERS as compared to far-field Raman. Using the RBM frequency, the diameters of the tubes were calculated and a very good agreement with the G--mode frequency was observed.

No MeSH data available.


TERS (red) and confocal Raman (blue) spectra of the G-mode at seven positions along an SWCNT bundle. The gray and light gray peaks represent the Lorentzian fits for the TERS and confocal Raman spectra, respectively.
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Figure 3: TERS (red) and confocal Raman (blue) spectra of the G-mode at seven positions along an SWCNT bundle. The gray and light gray peaks represent the Lorentzian fits for the TERS and confocal Raman spectra, respectively.

Mentions: In Figure 3 we show the TERS and confocal Raman spectra of the G-mode at the seven chosen positions. Based on the assignment made for the RBM in the previous section, we will now discuss the dependence of the G-mode on bundle height and nanotube chiral index.


Studying the local character of Raman features of single-walled carbon nanotubes along a bundle using TERS.

Peica N, Thomsen C, Maultzsch J - Nanoscale Res Lett (2011)

TERS (red) and confocal Raman (blue) spectra of the G-mode at seven positions along an SWCNT bundle. The gray and light gray peaks represent the Lorentzian fits for the TERS and confocal Raman spectra, respectively.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211227&req=5

Figure 3: TERS (red) and confocal Raman (blue) spectra of the G-mode at seven positions along an SWCNT bundle. The gray and light gray peaks represent the Lorentzian fits for the TERS and confocal Raman spectra, respectively.
Mentions: In Figure 3 we show the TERS and confocal Raman spectra of the G-mode at the seven chosen positions. Based on the assignment made for the RBM in the previous section, we will now discuss the dependence of the G-mode on bundle height and nanotube chiral index.

Bottom Line: Moreover, using TERS we are able to position different single-walled carbon nanotubes along a bundle, by correlating the observed radial breathing mode (RBM) with the AFM topography at the measuring point.The frequency of the G- mode behaves differently in TERS as compared to far-field Raman.Using the RBM frequency, the diameters of the tubes were calculated and a very good agreement with the G--mode frequency was observed.

View Article: PubMed Central - HTML - PubMed

Affiliation: Institut für Festkörperphysik, Technische Universität Berlin, Hardenbergstr, 36, 10623 Berlin, Germany. peica@physik.tu-berlin.de.

ABSTRACT
Here, we show that the Raman intensity of the G-mode in tip-enhanced Raman spectroscopy (TERS) is strongly dependent on the height of the bundle. Moreover, using TERS we are able to position different single-walled carbon nanotubes along a bundle, by correlating the observed radial breathing mode (RBM) with the AFM topography at the measuring point. The frequency of the G- mode behaves differently in TERS as compared to far-field Raman. Using the RBM frequency, the diameters of the tubes were calculated and a very good agreement with the G--mode frequency was observed.

No MeSH data available.