In situRaman spectroscopy studies on time-dependent inner tube growth in ferrocene-filled large diameter single-walled carbon nanotubes

2014 ◽  
Vol 251 (12) ◽  
pp. 2394-2400 ◽  
Author(s):  
Marianna V. Kharlamova ◽  
Christian Kramberger ◽  
Takeshi Saito ◽  
Hidetsugu Shiozawa ◽  
Thomas Pichler
Keyword(s):  
Carbon Nanotubes ◽  
Large Diameter ◽  
Single Walled Carbon Nanotubes ◽  
Time Dependent ◽  
Tube Growth ◽  
Single Walled Carbon ◽  
Spectroscopy Studies ◽  
Walled Carbon Nanotubes

Inner tube growth properties and electronic structure of ferrocene-filled large diameter single-walled carbon nanotubes

2013 ◽  
Vol 250 (12) ◽  
pp. 2575-2580 ◽  
Author(s):  
Marianna V. Kharlamova ◽  
Markus Sauer ◽  
Takeshi Saito ◽  
Stefan Krause ◽  
Xianjie Liu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electronic Structure ◽  
Large Diameter ◽  
Single Walled Carbon Nanotubes ◽  
Tube Growth ◽  
Single Walled Carbon ◽  
Growth Properties ◽  
Walled Carbon Nanotubes

Effects of the Molecular Weight of PCz on Selective Extraction of Large-Diameter Semiconducting Single-Walled Carbon Nanotubes

2021 ◽  
Vol 69 ◽  
pp. 11-21
Author(s):  
Ping Zhang ◽  
Wen Hui Yi ◽  
Bai Lei ◽  
Jin Feng Zhou ◽  
Yi Long Tian ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Molecular Weight ◽  
Arc Discharge ◽  
Large Diameter ◽  
Single Walled Carbon Nanotubes ◽  
Selective Extraction ◽  
High Yield ◽  
Extraction Technology ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

Due to the difficulty in the selective synthesis of semiconductor (s-) and metal (m-) single-walled carbon nanotubes (SWCNTs), we still need to explore the selective extraction technology of s-SWCNTs. Using Poly[9-(1-octylonoyl)-9H-carbazole-2,7-diyl] (PCz) extraction of s-SWCNTs has attracted extensive attention in recent years, because it can selective extraction of large-diameter s-SWCNTs with high purity. However, influence of the molecular weight of this polymer on the s-SWCNTs selective extraction properties remains unclear. In this study, we used PCz with different average molecular weights to study the ability of selective extraction s-SWCNTs from pristine arc discharge carbon nanotubes. Spectra studies indicate that compared to the PCz with lower molecular weight, the PCz with higher molecular weight has better selective extraction ability, and can help to obtain s-SWCNTs with higher purity (>99%) and high yield. FETs devices have been prepared by s-SWCNTs obtained via PCz with higher molecular weight exhibit higher on/off ratio, lower off current and lower subthreshold swing. This work offers a reference of the design and synthesis of PCz polymer that performs sufficient selective ability in extracting s-SWCNTs with promising applications.

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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