Shortening and dispersion of single-walled carbon nanotubes upon interaction with mixed supramolecular compounds

2016 ◽  
Vol 12 (3) ◽  
Author(s):  
Anna Jagusiak ◽  
Barbara Piekarska ◽  
Katarzyna Chłopaś ◽  
Elzbieta Bielańska ◽  
Tomasz Pańczyk
Keyword(s):  
Carbon Nanotubes ◽  
Aromatic Compounds ◽  
Evans Blue ◽  
Congo Red ◽  
Single Walled Carbon Nanotubes ◽  
Dye Molecules ◽  
Supramolecular Systems ◽  
Supramolecular Compounds ◽  
Simple Method ◽  
Walled Carbon Nanotubes

AbstractCongo red (CR) dye molecules self-associate in water solutions creating ribbon-like supramolecular structures that can bind various aromatic compounds by intercalation, forming mixed supramolecular systems. Mixed supramolecular systems, such as CR-doxorubicin and CR-Evans blue, interact with the surface of carbon nanotubes, leading to their stiffening and ultimately to their breaking and shortening. This work presents a simple method of obtaining short and straight carbon nanotubes with significantly better dispersion in aqueous solutions and consequently improved usability in biological systems.

Dispersing Single-Walled Carbon Nanotubes in Water by Adsorption of Polyphenols

2009 ◽  
Vol 620-622 ◽  
pp. 501-504
Author(s):  
Qiu Liao ◽  
Jing Sun ◽  
Lian Gao
Keyword(s):  
Carbon Nanotubes ◽  
Aromatic Compounds ◽  
Potential Application ◽  
Single Walled Carbon Nanotubes ◽  
Dispersion Interactions ◽  
Single Walled Carbon ◽  
Dispersion State ◽  
Ultrasonication Time ◽  
Walled Carbon Nanotubes

Single-walled carbon nanotubes (SWCNTs) were dispersed in water with the assistance of polyphenols (resorcinol and pyrogallol). SWCNTs have intrinsic tendency to adsorb aromatic compounds due to π-π dispersion interactions, which leads to SWCNTs noncovalently dispersed in water by adsorption of resorcinol or pyrogallol. The concentration of SWCNT suspension was determined by the absorbance value at 500 nm using UV-Vis spectrometer. The effects of polyphenol concentration and ultrasonication time on the dispersion state have been investigated. Resorcinol of 0.5 mg/mL was found to be most effective for solubilizing SWCNTs in water. Over 60 % of SWCNTs were well dispersed with ultrasonication time for 4 hours. However, SWCNTs were cut shorter and damages could be introduced with prolonged ultrasonication time. TEM images showed that SWCNT bundles became thinner with the presence of polyphenols. These aromatic compounds provide an effective way to disperse SWCNTs in water and might have potential application in nanocomposite preparation.

scholarly journals Simple Method to Improve Electrical Conductivity of Films Made from Single-Walled Carbon Nanotubes

Nanomaterials ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 1113 ◽  
Author(s):  
Bogumiła Kumanek ◽  
Tomasz Wasiak ◽  
Grzegorz Stando ◽  
Paweł Stando ◽  
Dariusz Łukowiec ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Conductivity ◽  
Single Walled Carbon Nanotubes ◽  
Simple Approach ◽  
Sonication Time ◽  
Free Standing ◽  
Simple Method ◽  
New Approach ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

Despite the widespread use of sonication for individualization of nanomaterials, its destructive nature is rarely acknowledged. In this study, we demonstrated how exposure of the material to a hostile sound wave environment can be limited by the application of another preprocessing step. Single-walled carbon nanotubes (CNTs) were initially ground in a household coffee grinder, which enabled facile deagglomeration thereof. Such a simple approach enabled us to obtain high-quality CNT dispersion at reduced sonication time. Most importantly, electrical conductivity of free-standing films prepared from these dispersion was improved almost fourfold as compared with unground material eventually reaching 1067 ± 34 S/cm. This work presents a new approach as to how electrical properties of nanocarbon ensembles may be enhanced without the application of doping agents, the presence of which is often ephemeral.

A Simple Method to Make Field Emitter Using Ropes of Single-Walled Carbon Nanotubes

1999 ◽  
Vol 16 (2) ◽  
pp. 117-119 ◽  
Author(s):  
Yu Ding ◽  
Qing-ling Hang ◽  
Hong-zhou Zhang ◽  
Sun-qi Feng ◽  
Zhi-gang Bai ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Single Walled Carbon Nanotubes ◽  
Simple Method ◽  
Field Emitter ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

Molecular dynamics simulations of simple aromatic compounds adsorption on single-walled carbon nanotubes

RSC Advances ◽  
2016 ◽  
Vol 6 (84) ◽  
pp. 80972-80980 ◽  
Author(s):  
Han Ding ◽  
Xin Shen ◽  
Chao Chen ◽  
Xiaojian Zhang
Keyword(s):  
Carbon Nanotubes ◽  
Molecular Dynamics ◽  
Molecular Dynamics Simulations ◽  
Aromatic Compounds ◽  
Single Walled Carbon Nanotubes ◽  
Md Simulations ◽  
Single Walled Carbon ◽  
Dynamics Simulations ◽  
Walled Carbon Nanotubes

We have conducted MD simulations and RDG calculations to reveal the mechanisms of simple aromatic compounds adsorption on SWCNTs.

Design of Dye-Sensitized Solar Cell by Inserting Single-Walled Carbon Nanotubes

2012 ◽  
Vol 622-623 ◽  
pp. 939-944
Author(s):  
Reza Yadipour ◽  
Karim Abbasian ◽  
Bita Azemoodeh Afshar ◽  
Ali Rostami
Keyword(s):  
Carbon Nanotubes ◽  
Solar Cell ◽  
Electron Pair ◽  
Single Walled Carbon Nanotubes ◽  
Energy Conversion Efficiency ◽  
Dye Sensitized Solar Cell ◽  
Dye Molecules ◽  
Dye Sensitized ◽  
Walled Carbon Nanotubes

In this paper, a solid-state dye sensitized solar cell (DSSC) based on carbon nanotubes by inserting N719 dye molecules has been designed for operating at 300oK and 330oK temperatures. The role of carbon nanotubes as hole and electron conducting agents and dye molecules as absorber of solar radiation and hole-electron pair producing agents has been discussed. After inserting N719 dye, parameters of the cell such as absorption coefficient of both layers (ZNO+SWNT, P3HT+SWNT), current density of solar cell , internal and external quantum efficiency of P3HT+SWNT layer have been obtained at 300oK and 330oK, numerically. Then, improvement value of energy conversion efficiency of the cell has been compared after inserting carbon nanotubes.

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