Synthesis of High-Density, Large-Diameter, and Aligned Single-Walled Carbon Nanotubes by Multiple-Cycle Growth Methods

ACS Nano ◽  
2011 ◽  
Vol 5 (5) ◽  
pp. 3849-3857 ◽  
Author(s):  
Weiwei Zhou ◽  
Lei Ding ◽  
Sungwoo Yang ◽  
Jie Liu
Keyword(s):  
Carbon Nanotubes ◽  
Large Diameter ◽  
Single Walled Carbon Nanotubes ◽  
High Density ◽  
Single Walled Carbon ◽  
Cycle Growth ◽  
Multiple Cycle ◽  
Walled Carbon Nanotubes ◽  
Growth Methods

Length-Sorted, Large-Diameter, Polyfluorene-Wrapped Semiconducting Single-Walled Carbon Nanotubes for High-Density, Short-Channel Transistors

ACS Nano ◽  
2016 ◽  
Vol 10 (2) ◽  
pp. 1888-1895 ◽  
Author(s):  
Frank Hennrich ◽  
Wenshan Li ◽  
Regina Fischer ◽  
Sergei Lebedkin ◽  
Ralph Krupke ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Large Diameter ◽  
Single Walled Carbon Nanotubes ◽  
High Density ◽  
Short Channel ◽  
Single Walled Carbon ◽  
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.

Patterning of Single-Walled Carbon Nanotubes Using Wet Chemical Self-Assembling and Photolithographic Technique

2005 ◽  
Vol 901 ◽  
Author(s):  
Myung-Sup Jung ◽  
Sung-Ouk Jung ◽  
Hee-Tae Jung ◽  
Do Yun Kim ◽  
Seok Gwang Doo
Keyword(s):  
Carbon Nanotubes ◽  
Carboxylic Acid ◽  
High Surface ◽  
Single Walled Carbon Nanotubes ◽  
High Density ◽  
Amino Groups ◽  
Patterned Substrate ◽  
Single Walled Carbon ◽  
Carboxylic Acid Groups ◽  
Walled Carbon Nanotubes

AbstractSingle-walled carbon nanotubes (SWNTs) have been chemically attached with high density onto a patterned substrate. To form the SWNT pattern, the substrate was treated with acid-labile group protected amine, and an amine prepattern was formed using a photolithographic process with a polymeric photo acid generator. The SWNT monolayer pattern was then formed through the amidation reaction between the carboxylic acid groups of carboxylated SWNTs (ca-SWNTs) and the prepatterned amino groups. A high-density multilayer was fabricated via further repeated reaction between the carboxylic acid groups of the ca-SWNTs and the amino groups of the linker with the aid of a condensation agent. Scanning electron microscopy results show that the patterned SWNT films have uniform coverage with high surface density.

Growth of High-Density-Aligned and Semiconducting-Enriched Single-Walled Carbon Nanotubes: Decoupling the Conflict between Density and Selectivity

ACS Nano ◽  
2013 ◽  
Vol 8 (1) ◽  
pp. 554-562 ◽  
Author(s):  
Jinghua Li ◽  
Kaihui Liu ◽  
Shibo Liang ◽  
Weiwei Zhou ◽  
Matthieu Pierce ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Single Walled Carbon Nanotubes ◽  
High Density ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

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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