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.

scholarly journals Thermoelectric Properties of Thin Films from Sorted Single-Walled Carbon Nanotubes

Materials ◽  
2020 ◽  
Vol 13 (17) ◽  
pp. 3808 ◽  
Author(s):  
Blazej Podlesny ◽  
Bogumila Kumanek ◽  
Angana Borah ◽  
Ryohei Yamaguchi ◽  
Tomohiro Shiraki ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Thermoelectric Properties ◽  
Large Scale ◽  
Single Walled Carbon Nanotubes ◽  
Parent Material ◽  
Free Standing ◽  
Two Phase ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes ◽  
Aqueous Two Phase Extraction

Single-walled carbon nanotubes (SWCNTs) remain one of the most promising materials of our times. One of the goals is to implement semiconducting and metallic SWCNTs in photonics and microelectronics, respectively. In this work, we demonstrated how such materials could be obtained from the parent material by using the aqueous two-phase extraction method (ATPE) at a large scale. We also developed a dedicated process on how to harvest the SWCNTs from the polymer matrices used to form the biphasic system. The technique is beneficial as it isolates SWCNTs with high purity while simultaneously maintaining their surface intact. To validate the utility of the metallic and semiconducting SWCNTs obtained this way, we transformed them into thin free-standing films and characterized their thermoelectric properties.

A new approach for the achievement of stable aqueous dispersions of carbon nanotubes

2019 ◽  
Vol 55 (41) ◽  
pp. 5809-5812 ◽  
Author(s):  
João Paulo V. Damasceno ◽  
Aldo J. G. Zarbin
Keyword(s):  
Carbon Nanotubes ◽  
Single Walled Carbon Nanotubes ◽  
New Approach ◽  
Aqueous Dispersions ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

A simple and innovative way to achieve highly stable aqueous dispersions of both multi- and single-walled carbon nanotubes is reported.

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

scholarly journals Non-covalent anchoring of oligonucleotides on single-walled carbon nanotubes via short bioreducible linker

RSC Advances ◽  
2017 ◽  
Vol 7 (46) ◽  
pp. 29212-29217 ◽  
Author(s):  
Elizaveta S. Permyakova ◽  
Darya S. Novopashina ◽  
Alya G. Venyaminova ◽  
Evgeny K. Apartsin
Keyword(s):  
Carbon Nanotubes ◽  
Single Walled Carbon Nanotubes ◽  
Simple Approach ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

This paper describes a simple approach to obtain hybrids of single-walled carbon nanotubes with therapeutically relevant oligonucleotides that are able to be released upon glutathione treatment at physiological concentrations.

scholarly journals Manufacture of Networks from Large Diameter Single-Walled Carbon Nanotubes of Particular Electrical Character

Nanomaterials ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 614 ◽  
Author(s):  
Edyta Turek ◽  
Bogumila Kumanek ◽  
Slawomir Boncel ◽  
Dawid Janas
Keyword(s):  
Carbon Nanotubes ◽  
Large Diameter ◽  
Single Walled Carbon Nanotubes ◽  
Phase Extraction ◽  
Free Standing ◽  
Two Phase ◽  
Trade Off ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes ◽  
Aqueous Two Phase Extraction

We have demonstrated that the aqueous two-phase extraction (ATPE) can differentiate between large diameter single-walled carbon nanotubes (CNTs) by electrical character. Introduction of “hydration modulators” to the ATPE machinery has enabled us to isolate metallic and semiconducting CNTs with ease. We have also shown that often there is a trade-off between the purity of the obtained fractions and the ability to separate both metallic and semiconducting CNTs at the same time. To isolate the separated CNTs from the matrices, we have proposed a method based on precipitation and hydrolysis, which can eliminate the need to use lengthy dialysis routines. In the final step, we prepared thin free-standing films from the sorted material and probed how electrical charge is transported through such macroscopic ensembles.

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