Journal ArticleDOI
Raman and IR spectroscopy of chemically processed single-walled carbon nanotubes.
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TLDR
In this article, the vibrational spectrum of bundled single-walled carbon nanotubes (SWNTs) during the purification process needed to remove metal catalyst and amorphous carbon present in arc-derived SWNT soot was studied.Abstract:
IR and Raman spectroscopy has been used to study the evolution of the vibrational spectrum of bundled single-walled carbon nanotubes (SWNTs) during the purification process needed to remove metal catalyst and amorphous carbon present in arc-derived SWNT soot. We have carried out a systematic study to define the different outcomes stemming from the purification protocol (e.g., DO, DO/HCl, DO/HNO3, H2O2, H2O2/HCl), where dry oxidation (DO) or refluxing in H2O2 was used in a first purification step to remove amorphous carbon. The second step involves acid reflux (HCl or HNO3) to remove the residual growth catalyst (Ni−Y). During strong chemical processing, it appears possible to create additional defects where carbon atoms are eliminated, the ring structure is now open, localized CC bonds are created, and O-containing groups can be added to this defect to stabilize the structure. Evolution of SWNT skeletal disorder obtained via chemical processing was studied by Raman scattering. Higher intensity ratios of R...read more
Citations
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Advanced carbon electrode materials for molecular electrochemistry.
TL;DR: This paper presents a meta-analyses of the physical and chemical properties of Boron-Doped Diamond for Electrochemistry as well as a mechanistic analysis of the properties of the diamond itself and some of its applications.
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Antibacterial Effects of Carbon Nanotubes: Size Does Matter!
TL;DR: It is provided the first evidence that the size (diameter) of carbon nanotubes (CNTs) is a key factor governing their antibacterial effects and that the likely main CNT-cytotoxicity mechanism is cell membrane damage by direct contact with CNTs.
Journal ArticleDOI
Raman spectroscopy of graphene and carbon nanotubes
TL;DR: In this article, the power of Raman spectroscopy as a probe and a characterization tool for sp2 carbon materials is discussed, with particular emphasis given to the field of photophysics.
Journal ArticleDOI
Surface and structural characterization of multi-walled carbon nanotubes following different oxidative treatments
Kevin A. Wepasnick,Billy Smith,Kaitlin E. Schrote,Hannah K. Wilson,Stephen R. Diegelmann,D. Howard Fairbrother +5 more
TL;DR: In this article, six commonly used wet chemical oxidants were evaluated in terms of their effects on the surface chemistry and structure of MWCNTs using a combination of analytical techniques, including X-ray photoelectron spectroscopy (XPS) and energy dispersive spectrograph (EDX).
Journal ArticleDOI
Organic functionalisation and characterisation of single-walled carbon nanotubes
Prabhpreet Singh,Stéphane Campidelli,Silvia Giordani,Silvia Giordani,Davide Bonifazi,Davide Bonifazi,Alberto Bianco,Maurizio Prato +7 more
TL;DR: This tutorial review surveys the covalent modification of SWCNTs with organic moieties, and illustrates the major analytical techniques routinely used to characterise the functionalised materials.
References
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Journal ArticleDOI
Optical Properties of Single-Wall Carbon Nanotubes
TL;DR: In this article, four kinds of single-wall carbon nanotubes (SWNTs) with different diameter distribution have been synthesized and optical absorption spectra have been measured.
Journal ArticleDOI
Diameter-Selective Raman Scattering from Vibrational Modes in Carbon Nanotubes
Apparao M. Rao,Ernst Richter,Shunji Bandow,Bruce Chase,Peter C. Eklund,Keith A. Williams,S. Fang,K. R. Subbaswamy,Madhu Menon,Andreas Thess,Richard E. Smalley,Gene Dresselhaus,Mildred S. Dresselhaus +12 more
TL;DR: In this paper, the Raman spectra of single wall carbon nanotubes (SWNTs) were studied using laser excitation wavelengths in the range from 514.5 to 1320 nanometers.
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Unraveling Nanotubes: Field Emission from an Atomic Wire
Andrew G. Rinzler,Jason H. Hafner,Pavel Nikolaev,Peter Nordlander,Daniel T. Colbert,Richard E. Smalley,Liang Lou,Seong-Gon Kim,David Tománek +8 more
TL;DR: Field emission of electrons from individually mounted carbon nanotubes has been found to be dramatically enhanced when the nanotube tips are opened by laser evaporation or oxidative etching, in a process that resembles unraveling the sleeve of a sweater.
Journal ArticleDOI
Raman Spectroscopy of Carbon Materials: Structural Basis of Observed Spectra
TL;DR: In this paper, Al-Jishi and Dresselha have attributed the second-order phonon density of states to the second order bands of the phonon densities of states.
Journal ArticleDOI
Large-scale purification of single-wall carbon nanotubes: process, product, and characterization
Andrew G. Rinzler,Jie Liu,Hongjie Dai,Pavel Nikolaev,Chad B. Huffman,Fernando J. Rodríguez-Macías,Peter J. Boul,A.H. Lu,Dieter Heymann,Daniel T. Colbert,R. S. Lee,John E. Fischer,Apparao M. Rao,P. C. Eklund,Richard E. Smalley +14 more
TL;DR: A readily scalable purification process capable of handling single-wall carbon nanotube (SWNT) material in large batches, which should greatly facilitate investigation of material properties intrinsic to the nanotubes.