scholarly journals Electrochemical Oxidations ofp-Doped Semiconducting Single-Walled Carbon Nanotubes

2016 ◽  
Vol 2016 ◽  
pp. 1-8
Author(s):  
Huaping Li ◽  
Lili Zhou
Keyword(s):  
Carbon Nanotubes ◽  
Chloride Solution ◽  
Methylene Chloride ◽  
Single Walled Carbon Nanotubes ◽  
Cyclic Voltammograms ◽  
Defect Site ◽  
Methylene Chloride Solution ◽  
Valence Bands ◽  
Two Peaks ◽  
Walled Carbon Nanotubes

Two oxidation peaks at 0.99, 1.48 V versus Fc/Fc+appear in the cyclic voltammograms of a series of defect-site functionalized SWNTs in methylene chloride solution in the presence of ferrocenes. These two peaks are demonstrated to be the electrochemical responses to the independent oxidation of v1and v2valence bands ofp-doped semiconducting SWNTs.

Near infrared photoluminescence modulation by defect site design using aryl isomers in locally functionalized single-walled carbon nanotubes

2017 ◽  
Vol 53 (93) ◽  
pp. 12544-12547 ◽  
Author(s):  
Tomohiro Shiraki ◽  
Shunsuke Uchimura ◽  
Tomonari Shiraishi ◽  
Hisashi Onitsuka ◽  
Naotoshi Nakashima
Keyword(s):  
Carbon Nanotubes ◽  
Near Infrared ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Defect Site ◽  
Defect Sites ◽  
Site Design ◽  
Walled Carbon Nanotubes ◽  
Isomeric Structures

Unexpected near infrared photoluminescence of locally-functionalized single-walled carbon nanotubes upon introducing isomeric structures in the defect sites is reported.

Critical Investigation of Defect Site Functionalization on Single-Walled Carbon Nanotubes

2011 ◽  
Vol 23 (1) ◽  
pp. 67-74 ◽  
Author(s):  
Elisa Del Canto ◽  
Kevin Flavin ◽  
Dania Movia ◽  
Cristina Navio ◽  
Carla Bittencourt ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Defect Site ◽  
Walled Carbon Nanotubes ◽  
Critical Investigation

Surface defect site density on single walled carbon nanotubes by titration

2000 ◽  
Vol 324 (1-3) ◽  
pp. 213-216 ◽  
Author(s):  
Douglas B. Mawhinney ◽  
Viktor Naumenko ◽  
Anya Kuznetsova ◽  
John T. Yates ◽  
J. Liu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Surface Defect ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Defect Site ◽  
Site Density ◽  
Walled Carbon Nanotubes ◽  
Surface Defect Site

Noncovalent porphyrin-functionalized single-walled carbon nanotubes: solubilization and spectral behaviors

2007 ◽  
Vol 11 (06) ◽  
pp. 418-427 ◽  
Author(s):  
Hiroto Murakami ◽  
Genki Nakamura ◽  
Takuro Nomura ◽  
Takeshi Miyamoto ◽  
Naotoshi Nakashima
Keyword(s):  
Carbon Nanotubes ◽  
Glassy Carbon Electrode ◽  
Glassy Carbon ◽  
Protoporphyrin Ix ◽  
Single Walled Carbon Nanotubes ◽  
Wavelength Shift ◽  
Cyclic Voltammograms ◽  
Carbon Electrode ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

We describe the solubilization/dispersion of as-produced and purified single-walled carbon nanotubes (raw-SWNTs and p-SWNTs) with protoporphyrin IX derivatives and tetraphenylporphyrin iron(III) chloride, the spectral behavior of the octaalkylporphyrins-solubilized shortened-SWNTs (s-SWNTs), and the electrochemistry of a p-SWNTs/FePP cast film on a glassy carbon electrode. Transmission electron and atomic force microscopies, as well as UV-visible-near IR spectroscopy, revealed that the protoporphyrin IX derivatives individually dissolved the p-SWNTs in polar solvents under mild conditions of sonication using a bath-type sonicator, followed by centrifugation at 1000 g. The raw-SWNTs were more easily dissolved than the p-SWNTs with protoporphyrin IX zinc(II) ( ZnPP ), whereas the amount of the solubilized/dispersed p-SWNTs did not depend on the concentration of the solubilizer and sonication time. The absorption and fluorescence spectral measurements of the octaalkylporphyrins in dimethylformamide containing 1 vol% tetrahydrofuran with various amounts of the s-SWNTs showed that the absorption maxima of the octaalkylporphyrins decreased with an increase in the concentration of the s-SWNTs without wavelength shift and the fluorescence of the porphyrins was quenched by the addition of the s-SWNTs. These spectral behaviors are direct evidence for the interaction between the nanotube sidewall and the porphyrins in the solutions. The cyclic voltammograms of the p-SWNTs/hemin ( FePP ) and free hemin ( FePP ) suggest that the nanotubes act as a conduction passage for electrons between hemin ( FePP ) and the glassy carbon electrode.

Purity Evaluation of Single-Walled Carbon Nanotubes Using Thermogravimetric Analysis

2013 ◽  
Vol 51 (2) ◽  
pp. 137-144
Author(s):  
Naesung Lee ◽  
Jeung Choon Goak ◽  
Tae Yang Kim ◽  
Jongwan Jung ◽  
Young-Soo Seo ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Thermogravimetric Analysis ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Purity Evaluation ◽  
Walled Carbon Nanotubes
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