Dramatic electrical conductivity improvement of carbon nanotube networks by simultaneous de-bundling and hole-doping with chlorosulfonic acid

2012 ◽  
Vol 22 (14) ◽  
pp. 6959 ◽  
Author(s):  
Yeontack Ryu ◽  
Liang Yin ◽  
Choongho Yu
Keyword(s):  
Electrical Conductivity ◽  
Carbon Nanotube ◽  
Chlorosulfonic Acid ◽  
Hole Doping ◽  
Carbon Nanotube Networks

Temperature Dependence of Electrical Conductivity of Multi-Walled Carbon Nanotube Networks in a Polystyrene Composite

2013 ◽  
Vol 543 ◽  
pp. 356-359 ◽  
Author(s):  
David Petras ◽  
Petr Slobodian ◽  
Robert Olejnik ◽  
Pavel Riha
Keyword(s):  
Electrical Conductivity ◽  
Carbon Nanotube ◽  
Temperature Dependence ◽  
Conduction Mechanism ◽  
Specific Role ◽  
Conduction Path ◽  
Heterogeneous Model ◽  
Multi Walled Carbon Nanotube ◽  
Carbon Nanotube Networks

The conductance properties of multi-walled carbon nanotube mats and their polystyrene composite were examined to investigate the mechanism of conduction and the specific role of the supporting polymer. By measuring the temperature dependence of the conductance, it was found that the conduction mechanism in carbon nanotube mat follows the series heterogeneous model when the conductance is described as the sum of metallic and barrier portions of the conduction path. This mechanism is affected by the polymeric portion of the composite, since the temperature dependence of the composite conductance is decreased.

Hexahapto-lanthanide interconnects between the conjugated surfaces of single-walled carbon nanotubes

2014 ◽  
Vol 43 (20) ◽  
pp. 7379-7382 ◽  
Author(s):  
Matthew L. Moser ◽  
Xiaojuan Tian ◽  
Aron Pekker ◽  
Santanu Sarkar ◽  
Elena Bekyarova ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Conductivity ◽  
Carbon Nanotube ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon Nanotube ◽  
Single Walled Carbon ◽  
Lanthanide Metals ◽  
Walled Carbon Nanotubes ◽  
Carbon Nanotube Networks

Organometallic bonding of lanthanide metals to the graphene sidewalls in single-walled carbon nanotube networks enhances the electrical conductivity, particularly in the case of Sm and Eu.

scholarly journals Influence of Carbon Nanotube-Pretreatment on the Properties of Polydimethylsiloxane/Carbon Nanotube-Nanocomposites

Polymers ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1355
Author(s):  
Astrid Diekmann ◽  
Marvin C. V. Omelan ◽  
Ulrich Giese
Keyword(s):  
Electrical Conductivity ◽  
Carbon Nanotube ◽  
Mechanical Performance ◽  
Softening Effect ◽  
Electrical Percolation ◽  
Optimum Parameters ◽  
Lauryl Ether ◽  
Solvent Residues ◽  
Electrical Percolation Threshold ◽  
Filler Dispersion

Incorporating nanofillers into elastomers leads to composites with an enormous potential regarding their properties. Unfortunately, nanofillers tend to form agglomerates inhibiting adequate filler dispersion. Therefore, different carbon nanotube (CNT) pretreatment methods were analyzed in this study to enhance the filler dispersion in polydimethylsiloxane (PDMS)/CNT-composites. By pre-dispersing CNTs in solvents an increase in electrical conductivity could be observed within the sequence of tetrahydrofuran (THF) > acetone > chloroform. Optimization of the pre-dispersion step results in an AC conductivity of 3.2 × 10−4 S/cm at 1 Hz and 0.5 wt.% of CNTs and the electrical percolation threshold is decreased to 0.1 wt.% of CNTs. Optimum parameters imply the use of an ultrasonic finger for 60 min in THF. However, solvent residues cause a softening effect deteriorating the mechanical performance of these composites. Concerning the pretreatment of CNTs by physical functionalization, the use of surfactants (sodium dodecylbenzenesulfonate (SDBS) and polyoxyethylene lauryl ether (“Brij35”)) leads to no improvement, neither in electrical conductivity nor in mechanical properties. Chemical functionalization enhances the compatibility of PDMS and CNT but damages the carbon nanotubes due to the oxidation process so that the improvement in conductivity and reinforcement is superimposed by the CNT damage even for mild oxidation conditions.

Sign in / Sign up

Export Citation Format

Share Document