Semi-conducting single-walled carbon nanotubes are detrimental when compared to metallic single-walled carbon nanotubes for electrochemical applications

We have investigated the degree of dispersion of single-walled carbon nanotubes (SWNTs) in solution using laser spectroscopic techniques. SWNTs were suspended in aqueous media using a sodium dodecyl sulfate (SDS) surfactant. SWNTs with different dispersion states were prepared by controlling the intensity and duration of sonication and centrifugation. The absorption and fluorescence spectroscopic techniques were employed to characterize the different dispersion state of the prepared samples. Nanotube suspensions with better dispersion showed higher fluorescence and sharper absorption peaks. The fluorescence data were characterized as a function of the nanotube chirality, and absorption peak shifts were analyzed depending on the first and second van Hove singularities (vHs) of semiconducting nanotubes.

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The Evaluation of Individual Dispersion of Single-Walled Carbon Nanotubes Using Absorption and Fluorescence Spectroscopic Techniques

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2007.008 ◽

2007 ◽

Vol 7 (11) ◽

pp. 3727-3730 ◽

Cited By ~ 14

Author(s):

Dokyung Yoon ◽

Sun-Jung Kang ◽

Jae-Boong Choi ◽

Young-Jin Kim ◽

Seunghyun Baik

Keyword(s):

Carbon Nanotubes ◽

Aqueous Media ◽

Sodium Dodecyl ◽

Single Walled Carbon Nanotubes ◽

Spectroscopic Techniques ◽

Single Walled Carbon ◽

Dispersion State ◽

Semiconducting Nanotubes ◽

Walled Carbon Nanotubes ◽

Nanotube Chirality

We have investigated the degree of dispersion of single-walled carbon nanotubes (SWNTs) in solution using laser spectroscopic techniques. SWNTs were suspended in aqueous media using a sodium dodecyl sulfate (SDS) surfactant. SWNTs with different dispersion states were prepared by controlling the intensity and duration of sonication and centrifugation. The absorption and fluorescence spectroscopic techniques were employed to characterize the different dispersion state of the prepared samples. Nanotube suspensions with better dispersion showed higher fluorescence and sharper absorption peaks. The fluorescence data were characterized as a function of the nanotube chirality, and absorption peak shifts were analyzed depending on the first and second van Hove singularities (vHs) of semiconducting nanotubes.

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Structural Recovery of Highly Oxidized Single-Walled Carbon Nanotubes Fabricated by Kneading and Electrochemical Applications

Chemistry of Materials ◽

10.1021/acs.chemmater.9b00719 ◽

2019 ◽

Vol 31 (9) ◽

pp. 3468-3475 ◽

Cited By ~ 12

Author(s):

Joong Tark Han ◽

Joon Young Cho ◽

Jung Hoon Kim ◽

Jeong In Jang ◽

Jun Suk Kim ◽

...

Keyword(s):

Carbon Nanotubes ◽

Single Walled Carbon Nanotubes ◽

Single Walled Carbon ◽

Electrochemical Applications ◽

Structural Recovery ◽

Walled Carbon Nanotubes

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ROLE OF THREE-PHONON AND FOUR-PHONON PROCESSES IN THERMAL TRANSPORT OF SINGLE-WALLED CARBON NANOTUBES

Modern Physics Letters B ◽

10.1142/s0217984913501170 ◽

2013 ◽

Vol 27 (16) ◽

pp. 1350117 ◽

Cited By ~ 5

Author(s):

P. SAPNA ◽

T. J. SINGH

Keyword(s):

Thermal Conductivity ◽

Carbon Nanotubes ◽

Single Walled Carbon Nanotubes ◽

Independent Effect ◽

Tube Length ◽

Single Walled Carbon ◽

Optical Modes ◽

Semiconducting Nanotubes ◽

Walled Carbon Nanotubes

Thermal conductivity of single-walled carbon nanotubes has been calculated considering the three-phonon and four-phonon processes. The contribution of the acoustic modes and optical modes in the relaxation rate of the phonon–phonon interaction and hence to the thermal conductivity have been considered. The thermal conductivity has been calculated for the (8, 0), (10, 0), (11, 0) and (13, 0) zigzag semiconducting nanotubes having different radii. It is found that the thermal conductivity increases linearly at low temperatures which is nearly T2 below 30 K and after reaching a peak, it decreases as aT-1 - bT-2 where a and b are constants and b > a at higher temperatures. It is also found that the thermal conductivity increases with increasing radius of the tube due to the independent effect of three-phonon process and four-phonon process. The thermal conductivity is also found to decrease with increasing tube length due to four-phonon process.

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