One-dimensional N2 gas inside single-walled carbon nanotubes

Kramberger, Christian; Thurakitseree, Theerapol; Koh, Heeyuen; Izumi, Yudai; Kinoshita, Toyohiko; Matsuki, Takayuki; Einarsson, Erik; Maruyama, Shigeo

doi:10.1016/j.carbon.2012.12.026

Cited by 16 publications

(15 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…More studies are needed to elucidate which, if any, of these suggestions play an important role, and in which materials. Finally, values between 404–405 eV (possibly shifted due to physisorption) have been typically assigned to N 2 molecules trapped inside carbon nanotubes or between graphene layers (e.g., [ 120 , 137 , 140 , 174 – 175 ]).…”

Section: Reviewmentioning

confidence: 99%

X-ray photoelectron spectroscopy of graphitic carbon nanomaterials doped with heteroatoms

Susi¹,

Pichler²,

Ayala³

2015

Beilstein J. Nanotechnol.

343

258

View full text Add to dashboard Cite

SummaryX-ray photoelectron spectroscopy (XPS) is one of the best tools for studying the chemical modification of surfaces, and in particular the distribution and bonding of heteroatom dopants in carbon nanomaterials such as graphene and carbon nanotubes. Although these materials have superb intrinsic properties, these often need to be modified in a controlled way for specific applications. Towards this aim, the most studied dopants are neighbors to carbon in the periodic table, nitrogen and boron, with phosphorus starting to emerge as an interesting new alternative. Hundreds of studies have used XPS for analyzing the concentration and bonding of dopants in various materials. Although the majority of works has concentrated on nitrogen, important work is still ongoing to identify its precise atomic bonding configurations. In general, care should be taken in the preparation of a suitable sample, consideration of the intrinsic photoemission response of the material in question, and the appropriate spectral analysis. If this is not the case, incorrect conclusions can easily be drawn, especially in the assignment of measured binding energies into specific atomic configurations. Starting from the characteristics of pristine materials, this review provides a practical guide for interpreting X-ray photoelectron spectra of doped graphitic carbon nanomaterials, and a reference for their binding energies that are vital for compositional analysis via XPS.

show abstract

Section: Reviewmentioning

confidence: 99%

X-ray photoelectron spectroscopy of graphitic carbon nanomaterials doped with heteroatoms

Susi¹,

Pichler²,

Ayala³

2015

Beilstein J. Nanotechnol.

343

258

View full text Add to dashboard Cite

show abstract

“…The observed maxima of the tangential G modes u N ¼ 1594.8 and u(c) ¼ 1564.3 yield an abundance c ¼ 48% C 23 in the nanotube walls. The C 12 and C 13 in CH 3 C 13 N have-under the current conditions-roughly the same probability to contribute to growth. The reaction pathways in ethanol have only been recently elucidated in a study using site-selectively isotope-labeled C 2 H 5 OH, where either one or both of the C atoms were replaced with C 13 .…”

Section: Fractionation Of C 13 and C 12mentioning

confidence: 74%

From isotope labeled CH₃CN to N₂inside single-walled carbon nanotubes

et al. 2014

Self Cite

View full text Add to dashboard Cite

The observation of one-dimensional N₂ inside single-walled carbon nanotubes raises the questions, how are the N₂ molecules formed and how do they manage to make their way to this peculiar place? We have used N(15) and C(13) isotope labeled acetonitrile during the synthesis of single-walled carbon nanotubes to investigate this process. The isotope shifts of phonons and vibrons are observed by Raman spectroscopy and X-ray absorption. We identify the catalytic decomposition of acetonitrile as the initial step in the reaction pathway to single-walled carbon nanotubes containing encapsulated N₂.

show abstract

“…Different methods are available to quantify the orientational order in such samples. Optical absorption spectroscopy, Raman spectroscopy, and X‐ray absorption have been utilized to derive actually very different results for VA‐SWCNT . The averaging over the probed volume as well as the employed wavelength are two crucial parameters that affect the apparent alignment, and have not been addressed specifically in the individual earlier reports.…”

Section: Introductionmentioning

confidence: 99%

“…Here, we revisit earlier specialized studies of the orientational order in differently vertically aligned single wall carbon nanotubes (). The alignment in such samples was studied either by second order Raman scattering or resonant X‐ray scattering . We apply an maximum amplitude wavelet image filter to extract and compare the orientational order directly from scanning electron micrographs.…”

Section: Introductionmentioning

confidence: 99%

Length scales in orientational order of vertically aligned single walled carbon nanotubes

Kramberger¹,

Thurakitseree

Shiozawa³

et al. 2013

Phys. Status Solidi B

Self Cite

View full text Add to dashboard Cite

We have studied the orientational order in films of vertically aligned single walled carbon nanotubes, by means of resonant Raman spectroscopy, resonant X‐ray absorption, and direct imaging. These methods investigate the hierarchical morphology at different length scales. Here, we discuss the systematic comparison of orientational order as function of wavelength in films with different inherent morphologies and provide thus a basis to quantitatively evaluate and compare the different experimental approaches.

show abstract

One-dimensional N2 gas inside single-walled carbon nanotubes

Cited by 16 publications

References 24 publications

X-ray photoelectron spectroscopy of graphitic carbon nanomaterials doped with heteroatoms

X-ray photoelectron spectroscopy of graphitic carbon nanomaterials doped with heteroatoms

From isotope labeled CH₃CN to N₂inside single-walled carbon nanotubes

Length scales in orientational order of vertically aligned single walled carbon nanotubes

Contact Info

Product

Resources

About

One-dimensional N2 gas inside single-walled carbon nanotubes

Cited by 16 publications

References 24 publications

X-ray photoelectron spectroscopy of graphitic carbon nanomaterials doped with heteroatoms

X-ray photoelectron spectroscopy of graphitic carbon nanomaterials doped with heteroatoms

From isotope labeled CH3CN to N2inside single-walled carbon nanotubes

Length scales in orientational order of vertically aligned single walled carbon nanotubes

Contact Info

Product

Resources

About

From isotope labeled CH₃CN to N₂inside single-walled carbon nanotubes