Research output: Contribution to journal › Article › peer-review
Analysis of Defect-Free Graphene Blocks in Nitrogen-Doped Bamboo-Like Carbon Nanotubes. / Podyacheva, Olga Yu; Suboch, Arina N.; Bokova-Sirosh, Sofya N. et al.
In: Physica Status Solidi (B) Basic Research, Vol. 255, No. 1, 1700253, 01.01.2018.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Analysis of Defect-Free Graphene Blocks in Nitrogen-Doped Bamboo-Like Carbon Nanotubes
AU - Podyacheva, Olga Yu
AU - Suboch, Arina N.
AU - Bokova-Sirosh, Sofya N.
AU - Romanenko, Anatoly I.
AU - Kibis, Lidiya S.
AU - Obraztsova, Elena D.
AU - Kuznetsov, Vladimir L.
PY - 2018/1/1
Y1 - 2018/1/1
N2 - The structure and electronic properties of the N-doped bamboo-like carbon nanotubes with different nitrogen content (N-CNTs) are studied by the use of transmission electron microscopy, electron energy loss spectroscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy supplemented by measurements of the temperature dependence of conductivity. XPS data are used to estimate the content of nitrogen represented by pyridinic, pyrrolic, graphitic, and oxidized N species and encapsulated molecular nitrogen. The graphene blocks surrounded by borders containing hole defects and N-species are considered as building blocks of N-CNT walls. The intensity ratio of D, G, and 2D bands in Raman spectra and XPS data on the concentration of N-species are used to analyze the size of defect-free graphene blocks in N-CNTs. The size of such blocks depends on the N-defect content and is estimated to be 1–2 nm. The increase of N-species content resulting in a decrease of graphene block size correlates with the decrease of current carrier concentration (nES) estimated within the Efros–Shklovskii model.
AB - The structure and electronic properties of the N-doped bamboo-like carbon nanotubes with different nitrogen content (N-CNTs) are studied by the use of transmission electron microscopy, electron energy loss spectroscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy supplemented by measurements of the temperature dependence of conductivity. XPS data are used to estimate the content of nitrogen represented by pyridinic, pyrrolic, graphitic, and oxidized N species and encapsulated molecular nitrogen. The graphene blocks surrounded by borders containing hole defects and N-species are considered as building blocks of N-CNT walls. The intensity ratio of D, G, and 2D bands in Raman spectra and XPS data on the concentration of N-species are used to analyze the size of defect-free graphene blocks in N-CNTs. The size of such blocks depends on the N-defect content and is estimated to be 1–2 nm. The increase of N-species content resulting in a decrease of graphene block size correlates with the decrease of current carrier concentration (nES) estimated within the Efros–Shklovskii model.
KW - carbon nanotubes
KW - defects
KW - doping
KW - nitrogen
KW - Raman spectroscopy
KW - OXIDATION
KW - NANOFIBERS
KW - RAMAN-SPECTROSCOPY
KW - GRAPHITE
KW - ALCOHOL
KW - GROWTH
KW - HETEROATOMS
KW - SPECTRA
UR - http://www.scopus.com/inward/record.url?scp=85030123585&partnerID=8YFLogxK
U2 - 10.1002/pssb.201700253
DO - 10.1002/pssb.201700253
M3 - Article
AN - SCOPUS:85030123585
VL - 255
JO - Physica Status Solidi (B): Basic Research
JF - Physica Status Solidi (B): Basic Research
SN - 0370-1972
IS - 1
M1 - 1700253
ER -
ID: 12101765