scholarly journals Separation of Semiconducting Carbon Nanotubes Using Conjugated Polymer Wrapping

Polymers ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 1548
Author(s):  
Jingyi Wang ◽  
Ting Lei
Keyword(s):  
Carbon Nanotubes ◽  
Conjugated Polymer ◽  
Large Scale ◽  
Charge Carrier Mobility ◽  
Influential Factors ◽  
Design Strategies ◽  
Practical Applications ◽  
Potential Applications ◽  
Walled Carbon Nanotubes ◽  
Polymer Wrapping

In the past two decades, single-walled carbon nanotubes (SWNTs) have been explored for electronic applications because of their high charge carrier mobility, low-temperature solution processability and mechanical flexibility. Semiconducting SWNTs (s-SWNTs) are also considered an alternative to traditional silicon-based semiconductors. However, large-scale, as-produced SWNTs have poor solubility, and they are mixtures of metallic SWNTs (m-SWNTs) and s-SWNTs, which limits their practical applications. Conjugated polymer wrapping is a promising method to disperse and separate s-SWNTs, due to its high selectivity, high separation yield and simplicity of operation. In this review, we summarize the recent progress of the conjugated polymer wrapping method, and discuss possible separation mechanisms for s-SWNTs. We also discuss various parameters that may affect the selectivity and sorting yield. Finally, some electronic applications of polymer-sorted s-SWNTs are introduced. The aim of this review is to provide polymer chemist a basic concept of polymer based SWNT separation, as well as some polymer design strategies, influential factors and potential applications.

Silk fibroin biomaterial-functionalized carbon nanotubes for high water dispersibility and promising biomedical applications

2018 ◽  
Vol 89 (7) ◽  
pp. 1144-1152 ◽  
Author(s):  
Yehua Sun ◽  
Yaqin Fu ◽  
Jingjing Luo ◽  
Rui Wang ◽  
Yubing Dong
Keyword(s):  
Carbon Nanotubes ◽  
Silk Fibroin ◽  
Water Solution ◽  
High Water ◽  
Water Soluble ◽  
Practical Applications ◽  
Potential Applications ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Functionalized Mwcnts

The dispersion of carbon nanotubes in solvents is crucial for their practical applications. In this study, multi-walled carbon nanotubes (MWCNTs) functionalized with water-soluble silk fibroin (SF) were prepared via chemical modification on the carbon nanotube surface in water solution. These fillers are low in toxicity and environmentally friendly. The SF-functionalized MWCNTs greatly improved dispersion in H2O and methanoic acid. Additionally, a methyl thiazolyl tetrazolium assay was performed to assess biocompatibility and the results indicated the favorable biocompatible properties of MWCNTs due to SF functionalization. Therefore, SF-functionalized MWCNTs have potential applications in waterborne polymer-based nanocomposites, especially in the biomedical field.

Covalent Atomic Bridges Enable Unidirectional Enhancement of Electronic Transport in Aligned Carbon Nanotubes

2019 ◽  
Author(s):  
Mingguang Chen ◽  
Wangxiang Li ◽  
Anshuman Kumar ◽  
Guanghui Li ◽  
Mikhail Itkis ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Transport ◽  
Large Scale ◽  
The Novel ◽  
Electrical Measurements ◽  
Metal Atoms ◽  
Aligned Carbon Nanotubes ◽  
Transport Channels ◽  
Walled Carbon Nanotubes ◽  
Bulk Structures

<p>Interconnecting the surfaces of nanomaterials without compromising their outstanding mechanical, thermal, and electronic properties is critical in the design of advanced bulk structures that still preserve the novel properties of their nanoscale constituents. As such, bridging the p-conjugated carbon surfaces of single-walled carbon nanotubes (SWNTs) has special implications in next-generation electronics. This study presents a rational path towards improvement of the electrical transport in aligned semiconducting SWNT films by deposition of metal atoms. The formation of conducting Cr-mediated pathways between the parallel SWNTs increases the transverse (intertube) conductance, while having negligible effect on the parallel (intratube) transport. In contrast, doping with Li has a predominant effect on the intratube electrical transport of aligned SWNT films. Large-scale first-principles calculations of electrical transport on aligned SWNTs show good agreement with the experimental electrical measurements and provide insight into the changes that different metal atoms exert on the density of states near the Fermi level of the SWNTs and the formation of transport channels. </p>

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.

Structure Controlled Synthesis of Vertically Aligned Carbon Nanotubes Using Thermal Chemical Vapor Deposition Process

2010 ◽  
Vol 133 (3) ◽  
Author(s):  
Myung Gwan Hahm ◽  
Young-Kyun Kwon ◽  
Ahmed Busnaina ◽  
Yung Joon Jung
Keyword(s):  
Carbon Nanotubes ◽  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Large Scale ◽  
Chemical Vapor ◽  
Controlled Synthesis ◽  
Full Potential ◽  
Thermal Chemical Vapor Deposition ◽  
Vertically Aligned ◽  
Walled Carbon Nanotubes

Due to their unique one-dimensional nanostructure along with excellent mechanical, electrical, and optical properties, carbon nanotubes (CNTs) become a promising material for diverse nanotechnology applications. However, large-scale and structure controlled synthesis of CNTs still have many difficulties due to the lack of understanding of the fundamental growth mechanism of CNTs, as well as the difficulty of controlling atomic-scale physical and chemical reactions during the nanotube growth process. Especially, controlling the number of graphene wall, diameter, and chirality of CNTs are the most important issues that need to be solved to harness the full potential of CNTs. Here we report the large-scale selective synthesis of vertically aligned single walled carbon nanotubes (SWNTs) and double walled carbon nanotubes (DWNTs) by controlling the size of catalyst nanoparticles in the highly effective oxygen assisted thermal chemical vapor deposition (CVD) process. We also demonstrate a simple but powerful strategy for synthesizing ultrahigh density and diameter selected vertically aligned SWNTs through the precise control of carbon flow during a thermal CVD process.

Large-scale fabrication of a flexible, highly conductive composite paper based on molybdenum disulfide–Pt nanoparticle–single-walled carbon nanotubes for efficient hydrogen production

2017 ◽  
Vol 53 (2) ◽  
pp. 380-383 ◽  
Author(s):  
I-Wen Peter Chen ◽  
Yu-Xiang Chen ◽  
Chien-Wei Wu ◽  
Chun-Chien Chiu ◽  
Yu-Chieh Hsieh
Keyword(s):  
Carbon Nanotubes ◽  
Hydrogen Production ◽  
Molybdenum Disulfide ◽  
Large Scale ◽  
Single Walled Carbon Nanotubes ◽  
Two Dimensional ◽  
Pt Nanoparticle ◽  
Two Dimensional Materials ◽  
Walled Carbon Nanotubes ◽  
Composite Paper

Creating efficient hydrogen production properties from the macroscopic assembly of two-dimensional materials is still an unaccomplished goal.

scholarly journals Magnetic orientation of single-walled carbon nanotubes or their composites using polymer wrapping

2008 ◽  
Vol 9 (2) ◽  
pp. 024213 ◽  
Author(s):  
Hiroaki Yonemura ◽  
Yuuichi Yamamoto ◽  
Sunao Yamada ◽  
Yoshihisa Fujiwara ◽  
Yoshifumi Tanimoto
Keyword(s):  
Carbon Nanotubes ◽  
Single Walled Carbon Nanotubes ◽  
Magnetic Orientation ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes ◽  
Polymer Wrapping

Improved photoconductive properties of composite nanofibers based on aligned conjugated polymer and single-walled carbon nanotubes

Nano Research ◽  
2013 ◽  
Vol 6 (2) ◽  
pp. 149-158 ◽  
Author(s):  
Florian Massuyeau ◽  
Yuanchun Zhao ◽  
Abdel Aziz El Mel ◽  
Abu Yaya ◽  
Frédéric Geschier ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Conjugated Polymer ◽  
Composite Nanofibers ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

Large-scale production of single-walled carbon nanotubes by induction thermal plasma

2007 ◽  
Vol 40 (8) ◽  
pp. 2375-2387 ◽  
Author(s):  
Keun Su Kim ◽  
German Cota-Sanchez ◽  
Christopher T Kingston ◽  
Matej Imris ◽  
Benoit Simard ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Thermal Plasma ◽  
Large Scale ◽  
Single Walled Carbon Nanotubes ◽  
Scale Production ◽  
Single Walled Carbon ◽  
Induction Thermal Plasma ◽  
Large Scale Production ◽  
Walled Carbon Nanotubes
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