Cited by 106Carbon Nanotubes in CompositesGraphene research and applicationsBoron and Carbon Nanomaterials Research

Effects of nitrogenation on single-walled carbon nanotubes within density functional theory

Lim, San Hua, Li, Ruijiang, Ji, Wei, Lin, Jianyi·2007·Physical Review B

Abstract

The effects of nitrogenation on single-walled carbon nanotubes are investigated within the ab initio density functional theory. Four different types of nitrogenation have been considered: (i) direct substitution of nitrogen atoms, (ii) substitution with a formation of vacancy (pyridinelike doping), (iii) exohedral chemisorption of N adatoms, and (iv) sidewall covalent -$\mathrm{N}{\mathrm{H}}_{2}$ functionalization. Structural deformations, electronic band structures, density of states, and ionization potential energies are calculated and compared among the different types of nitrogenated nanotubes. Magnetism is observed for chemisorbed single-walled carbon nanotubes (SWNTs) with magnetic moment of $0.7\phantom{\rule{0.3em}{0ex}}{\ensuremath{\mu}}_{B}$. In addition, the relaxed structures of SWNTs with two neighboring chemisorbed N adatoms are generally more complex than those of singly chemisorbed N adatom. The barrier energies needed to coalesce two N adatoms chemisorbed on SWNTs to form a free ${\mathrm{N}}_{2}$ molecule are higher than those for a graphene sheet.

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Crossref · 10.1103/physrevb.76.195406

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  • The N1s spectrum of SilkNCT can be fitted by four peaks attributed to pyridinic N, pyrrolic N, quaternary or graphitic N, and pyridine N-oxide N, indicating that part of N elements in pristine silk transformed into N substituents in graphitic carbon.

    “Figure 1F shows that the N1s spectrum could be fitted by four peaks attributed to the pyridinic N, pyrrolic N, quaternary or graphitic N, and pyridine N-oxide N, respectively, indicating that part of N elements in pristine silk has transformed into N substituents in graphitic carbon (34, 35, 37).”

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Authors
Lim, S. H., Li, R., Ji, W., & Lin, J.
Affiliations
  • National University of Singapore (SG)
  • Institute of Chemical and Engineering Sciences (SG)
Venue
Physical Review B
Published
2007-11-07
Volume
76
Issue
19
ISSN
  • 1098-0121 (ISSN-L)
  • 1550-235X
OpenAlex
W2071263213
Cited by
106
References
27
Citations by year
2026: 1 · 2025: 4 · 2024: 3 · 2023: 4 · 2022: 5 · 2021: 2 · 2020: 3 · 2019: 8 · 2018: 4 · 2017: 4 · 2016: 6 · 2015: 9 · 2014: 5 · 2013: 6 · 2012: 4
FWCI
4.23
Type
journal article
Language
en
Open access
closed
Locations
  • Physical Review B (publishedVersion)
  • National University of Singapore (submittedVersion)
Topics
  • Physical Sciences › Materials Science › Materials Chemistry › Carbon Nanotubes in Composites
  • Physical Sciences › Materials Science › Materials Chemistry › Graphene research and applications
  • Physical Sciences › Materials Science › Materials Chemistry › Boron and Carbon Nanomaterials Research
Keywords
single-walled carbon nanotubes, nitrogen doping, sidewall functionalization, structural deformation, electronic band structure, density of states, ionization potential, magnetism

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