Title(n,m) Assignments of Metallic Single-Walled Carbon Nanotubes by Raman Spectroscopy: The Importance of Electronic Raman Scattering
AuthorsZhang, Daqi
Yang, Juan
Li, Meihui
Li, Yan
AffiliationPeking Univ, State Key Lab Rare Earth Mat Chem & Applicat, Key Lab Phys & Chem Nanodevices, Beijing Natl Lab Mol Sci,Coll Chem & Mol Engn, Beijing 100871, Peoples R China.
Keywordssingle-walled carbon nanotubes
electronic Raman scattering
resonant Raman spectroscopy
chirality assignments
M-ii splitting
RAYLEIGH-SCATTERING
CHIRAL STRUCTURE
FLUORESCENCE
TRANSITIONS
ABUNDANCE
CATALYSTS
GRAPHENE
SPECTRA
GROWTH
MODES
Issue Date2016
PublisherACS NANO
CitationACS NANO.2016,10(12),10789-10797.
AbstractIn this work, we report an accurate and convenient method that can be used to assign the chirality of all metallic single-walled carbon * nanotubes (M-SWNTs). This method is designed based on the electronic Raman scattering (ERS) features, which are resonantly enhanced at the corresponding excitonic transition energies (M-ii(+) and M-ii(-)). Using this method, we are able to accurately determine the electronic property M-ii, with the resolution of a vibrational Raman spectroscopy (similar to 0.3 meV), which is significantly higher than that of the electronic spectroscopies (similar to 3 meV). We use the M-11 splitting value, which is found insensitive to environmental changes, as a universal criteria for (n,m) assignments in various environments. As an illustrative example, simply using a commercialized Raman spectrometer with two laser lines (1.959 and 2.330 eV), we are able to unambiguously assign 18 metallic chiralities with M-11 in the 1.6-2.3 eV range in our samples. This method provides an accurate database of M-ii's in a similar way as photoluminescence excitation spectroscopy does for S-ii's. It can facilitate further systematic studies on the properties of MSWNTs with defined chirality.
URIhttp://hdl.handle.net/20.500.11897/458198
ISSN1936-0851
DOI10.1021/acsnano.6b04453
IndexedSCI(E)
Appears in Collections:化学与分子工程学院
稀土材料化学与应用国家重点实验室
纳米器件物理与化学教育部重点实验室

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