TITLE

Characteristics of the Raman spectra of single-walled carbon nanotube bundles under electrochemical potential control

AUTHOR(S)
Takeda, Norihiko; Murakoshi, Kei
PUB. DATE
May 2007
SOURCE
Analytical & Bioanalytical Chemistry;May2007, Vol. 388 Issue 1, p103
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Resonant Raman scattering spectra of single-walled carbon nanotube–sodium dodecyl sulfate (SWNT–SDS) bundles adsorbed on Au electrodes have been investigated in aqueous electrolytes. Raman intensities of the radial breathing mode (RBM) with 785-nm laser excitation were monitored at different electrode potentials between −0.5 and +0.8 V relative to the SCE. Six resolved RBM peaks assignable to different diameter tubes all decreased in intensity when the electrode was positively biased, because of depletion of valence-band electrons associated with resonant excitation. The attenuation occurred at more positive potentials for narrower-diameter tubes with higher RBM frequencies consistent with their larger bandgaps. The results suggest the Fermi level is equilibrated in bundled SWNTs in contrast with the large Fermi-level shifts reported for isolated SWNTs.
ACCESSION #
24513380

 

Related Articles

  • Surface enhanced Raman scattering from multiwalled carbon nanotubes at low temperatures. Gohil, Smita; Ghosh, Shankar // Applied Physics Letters;4/5/2010, Vol. 96 Issue 14, p143108 

    We report temperature dependent Raman spectra of multiwalled carbon nanotubes deposited as dilute dispersions on surface enhanced Raman scattering active substrate. At low temperature, i.e, below 30 K both the tangential and the disorder mode acquire additional spectral features which are...

  • Raman and SERS Studies of Single-walled Carbon Nanotubes and Nanotubes/Conjugated Polymers Composites. Lefrant, S.; Buisson, J. P.; Mevellec, J. Y.; Baibarac, M.; Baltog, I. // AIP Conference Proceedings;9/19/2007, Vol. 935 Issue 1, p26 

    In this paper, we recall the main characteristics of Raman spectra of single-walled carbon nanotubes. We illustrate our studies by results obtained on HiPCO samples on one hand, and “arc electric” samples on the other hand by using two different excitation wavelengths. We focus on...

  • Carbon nanotubes: Doped defects tracked down. Freitag, Marcus // Nature Materials;Nov2008, Vol. 7 Issue 11, p840 

    The article highlights the study by Ado Jorio and colleagues, published within the issue, which report the detection of doped defects in carbon nanotubes with the help of a new feature in Raman scattering spectra called the second order D-band. The second order D-band peak can be used to...

  • Raman scattering of linear chains of strongly coupled Ag nanoparticles on SWCNTs. Valmalette, Jean-Christophe; Zhenquan Tan; Abe, Hiroya; Ohara, Satoshi // Scientific Reports;6/13/2014, p1 

    We compare the Raman scattering properties of hybrid nanostructures consisting of Ag nanoparticles (NPs) in disordered and aligned arrangements on single-walled carbon nanotubes (SWCNTs) as a result of chemical and photoreduction methods. In the latter case, the unique structure of the very...

  • Preparation of parallel arrayed carbon nanotube film and its structure research. Li, Z.; Wang, M.; Yang, B.; Xu, Y. // Inorganic Materials;Jul2007, Vol. 43 Issue 7, p696 

    In an atmosphere of hydrogen and methane mixture, we have grown well-aligned carbon nanotube film on a Si slice by microwave plasma enhanced chemical vapor deposition. Observing and analyzing through SEM, TEM, and Raman spectra, we found that carbon nanotubes were vertically arrayed in the film....

  • Carbon Nanotube Characterization by Resonance Raman Spectroscopy. Verhaegen, Marc; Blais-Ouellette, Sébastien // Spectroscopy;Sep2010 Applications Notebook, p22 

    The article discusses the carbon nanotube (CNT) characterization through Resonant Raman Spectroscopy (RRS). It reveals that RRS provides a unique tool to characterize the diameter and chirality distribution of a mixed population CNT. It also notes that RRS is also a powerful method to monitor...

  • Raman spectral features of longer polyynes HC2 nH ( ${\sf n=4}$—8) in SWNTs. Wakabayashi, T.; Murakami, T.; Nagayama, H.; Nishide, D.; Kataura, H.; Achiba, Y.; Tabata, H.; Hayashi, S.; Shinohara, H. // European Physical Journal D -- Atoms, Molecules, Clusters & Opti;Nov2009, Vol. 52 Issue 1-3, p79 

    Size-selected linear hydrocarbon molecules, polyynes HC2nH, were contacted in solutions with single-wall carbon nanotubes (SWNTs) prepared from laser-ablated metal/carbon composite rods (Rh/Pt/C) to produce polyyne-encapsulating SWNTs, HC2nH@SWNT(RhPt). New Raman spectral features were observed...

  • Development of tip-enhanced optical spectroscopy for biological applications: a review. Elfick, Alistair P. D.; Downes, Andrew R.; Mouras, Rabah // Analytical & Bioanalytical Chemistry;Jan2010, Vol. 396 Issue 1, p45 

    Tip-enhanced optical spectroscopy is an approach that holds a good deal of promise for the nanoscale characterisation of matter. Tip-enhanced Raman spectroscopy (TERS) has been demonstrated on a variety of samples: inorganic, organic and biological. Imaging using TERS has been shown for carbon...

  • How does the substrate affect the Raman and excited state spectra of a carbon nanotube? Steiner, Mathias; Freitag, Marcus; Tsang, James C.; Perebeinos, Vasili; Bol, Ageeth A.; Failla, Antonio V.; Avouris, Phaedon // Applied Physics A: Materials Science & Processing;Aug2009, Vol. 96 Issue 2, p271 

    We study the optical properties of a single, semiconducting single-walled carbon nanotube (CNT) that is partially suspended across a trench and partially supported by a SiO2-substrate. By tuning the laser excitation energy across the E33 excitonic resonance of the suspended CNT segment, the...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics