scholarly journals Effect of medium dielectric constant on the physical properties of single-walled carbon nanotubes

2013 ◽  
Vol 413 ◽  
pp. 35-38 ◽  
Author(s):  
J. Gao ◽  
W. Gomulya ◽  
M.A. Loi
Keyword(s):  
Carbon Nanotubes ◽  
Dielectric Constant ◽  
Physical Properties ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

Versatile Synthesis of Individual Single-Walled Carbon Nanotubes from Nickel Nanoparticles for the Study of Their Physical Properties

2004 ◽  
Vol 108 (44) ◽  
pp. 17112-17118 ◽  
Author(s):  
Matthieu Paillet ◽  
Vincent Jourdain ◽  
Philippe Poncharal ◽  
Jean-Louis Sauvajol ◽  
Ahmed Zahab ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Physical Properties ◽  
Nickel Nanoparticles ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

Excitonic transition energies in single-walled carbon nanotubes: Dependence on environmental dielectric constant

2007 ◽  
Vol 244 (11) ◽  
pp. 4002-4005 ◽  
Author(s):  
Yutaka Ohno ◽  
Shinya Iwasaki ◽  
Yoichi Murakami ◽  
Shigeru Kishimoto ◽  
Shigeo Maruyama ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Dielectric Constant ◽  
Single Walled Carbon Nanotubes ◽  
Transition Energies ◽  
Single Walled Carbon ◽  
Excitonic Transition ◽  
Walled Carbon Nanotubes

Chemical structures and physical properties of vanadium oxide films modified by single-walled carbon nanotubes

2016 ◽  
Vol 18 (3) ◽  
pp. 1422-1428 ◽  
Author(s):  
Qiong He ◽  
Xiangdong Xu ◽  
Meng Wang ◽  
Minghui Sun ◽  
Yadong Jiang ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Physical Properties ◽  
Vanadium Oxide ◽  
Composite Films ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Chemical Structures ◽  
Walled Carbon Nanotubes

A series of vanadium oxide (VOx)–single-walled carbon nanotube (SWCNT) composite films with different SWCNT concentrations were prepared and systematically investigated. The critical SWCNT concentrations for modification of VOx films were experimentally deduced.

Growth and physical properties of individual single-walled carbon nanotubes

2005 ◽  
Vol 14 (9) ◽  
pp. 1426-1431 ◽  
Author(s):  
Matthieu Paillet ◽  
Vincent Jourdain ◽  
Philippe Poncharal ◽  
Jean-Louis Sauvajol ◽  
Ahmed Zahab ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Physical Properties ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

Individualities and average behavior in the physical properties of small diameter single-walled carbon nanotubes

Carbon ◽  
2004 ◽  
Vol 42 (5-6) ◽  
pp. 971-978 ◽  
Author(s):  
J. Kürti ◽  
V. Zólyomi ◽  
M. Kertesz ◽  
G. Sun ◽  
R.H. Baughman ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Physical Properties ◽  
Small Diameter ◽  
Single Walled Carbon Nanotubes ◽  
Average Behavior ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

scholarly journals Characterizations of enriched metallic single-walled carbon nanotubes in polymer composite

2004 ◽  
Vol 856 ◽  
Author(s):  
Bin Chen ◽  
Jing Li ◽  
Yijiang Lu ◽  
Martin Cinke ◽  
Dyng Au ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Dielectric Constant ◽  
Single Walled Carbon Nanotubes ◽  
Electronic Density ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Structure Changes ◽  
Anisotropic Interactions ◽  
Polarized Raman ◽  
Walled Carbon Nanotubes

ABSTRACTWe characterize the electric properties of single-walled carbon nanotube (SWNT) dispersed in the polymethyl methacrylate (PMMA) composites. In the melt-blended sample, the SWNTs – originally semiconducting – became predominantly metallic. The interaction of the PMMA and SWNT is investigated by the polarized Raman studies. The structure changes in the PMMA and SWNT shows that the anisotropic interactions play important role in SWNT electronic density of states (DOS) changes. The increased metallic SWNT percentage is confirmed by the conductivity and dielectric constant measurements of composite and neat PMMA.

Measuring the electronic properties of single-walled carbon nanotubes with adsorbed porphyrins using optical transitions

2010 ◽  
Vol 14 (10) ◽  
pp. 885-890 ◽  
Author(s):  
Gustavo de A.M. Sáfar ◽  
Dayse CarvalhoDa-Silva ◽  
Ynara M. Idemori ◽  
Henrique B. Ribeiro ◽  
Cristiano Fantini ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Dielectric Constant ◽  
Selective Adsorption ◽  
Surrounding Medium ◽  
Single Walled Carbon Nanotubes ◽  
Dielectric Constants ◽  
Single Walled Carbon ◽  
Uv Raman Spectroscopy ◽  
Uv Raman ◽  
Walled Carbon Nanotubes

The dielectric constants of diverse media surrounding single-walled carbon nanotubes (SWCNTs) were probed using photoluminescence (PL) excitation maps of porphyrin/SWCNT aqueous suspensions. The excitation and emission maxima of the nanotubes in these maps were used to probe the dielectric constant variation and doping originated from the porphyrin molecules. The net dielectric constant was calculated for the surrounding medium for each nanotube index and porphyrin isomer. The spread of the dielectric constant values calculated from the data for each (n, m) nanotube chiral index is interpreted on the basis of selective adsorption by each (n, m) nanotube, for each porphyrin isomer. Ultraviolet (UV) Raman spectroscopy corroborates the doping process through the shift of a G band around 1608 cm-1

Biological Effect of Single Wall Carbon Nanotubes on Skeletonema costatum and Prorocentrum donghaiense in Seawaters

2015 ◽  
Vol 645-646 ◽  
pp. 1326-1332
Author(s):  
Fang Fang Li ◽  
Jiang Tao Wang ◽  
Li Ju Tan
Keyword(s):  
Carbon Nanotubes ◽  
Physical Properties ◽  
Biological Effect ◽  
Algal Growth ◽  
Single Walled Carbon Nanotubes ◽  
Single Wall Carbon Nanotubes ◽  
Prorocentrum Donghaiense ◽  
Single Walled Carbon ◽  
Nanometer Materials ◽  
Walled Carbon Nanotubes

Carbon nanotubes (CNTs) have been used in a variety of industrial areas as a kinds of new nanometer materials. Algal growth test was developed to determine the biological effect of single-walled carbon nanotubes (SWNTs) on Skeletonemacostatum and Prorocentrum donghaiense. The results showed that SWNTs stimulated the growth of S. costatum within 72 h and 24 h as theirs concentrations were smaller than 0.5 mg/L and 10 mg/L respectively, While the growth of S. costatum was inhibited within 48 h and 96 h as theirs concentrations were higher than 10 mg/L and 0.5mg/L respectively (p＜0.05). The concentrations of chlorophyll were the same as the density of phytoplankton cells. The growth of P. donghaiense was inhibited as SWNTs concentrations were higher than 100 mg/L within 72 h, while SWNTs promoted the growth of P. donghaiense within 48 h after SWNTs were added as their concentrations were smaller than 5 mg/L（p＜0.05). The results of chlorophyll were similar to the density of P. donghaiense cells. The roles of SWNTs on the growth of algae were suggested to be associated with the active of some enzymes and the physical properties, such as agglomeration and shading.

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