Dithiafulvenyl-grafted phenylene ethynylene polymers as selective and reversible dispersants for single-walled carbon nanotubes

2015 ◽  
Vol 51 (1) ◽  
pp. 149-152 ◽  
Author(s):  
Karimulla Mulla ◽  
Shuai Liang ◽  
Haseena Shaik ◽  
Eyad A. Younes ◽  
Alex Adronov ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Conjugated Polymers ◽  
Single Walled Carbon Nanotubes ◽  
Side Chains ◽  
Phenylene Ethynylene ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

Phenylene ethynylene-based π-conjugated polymers grafted with dithiafulvenyl groups on their side chains were found to be efficient in dispersing single-walled carbon nanotubes in a selective and controllable way.

scholarly journals Recent developments in the selective dispersion of single-walled carbon nanotubes using conjugated polymers

2017 ◽  
Vol 8 (11) ◽  
pp. 7292-7305 ◽  
Author(s):  
Darryl Fong ◽  
Alex Adronov
Keyword(s):  
Carbon Nanotubes ◽  
Conjugated Polymers ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Recent Developments ◽  
Walled Carbon Nanotubes

Selective dispersion of single-walled carbon nanotubes can be accomplished using conjugated polymers by varying a number of parameters.

scholarly journals Enhancing near-infrared photoluminescence from single-walled carbon nanotubes by defect-engineering using benzoyl peroxide

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Lukasz Przypis ◽  
Maciej Krzywiecki ◽  
Yoshiaki Niidome ◽  
Haruka Aoki ◽  
Tomohiro Shiraki ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Conjugated Polymers ◽  
Near Infrared ◽  
Light Emission ◽  
Single Walled Carbon Nanotubes ◽  
Organic Radical ◽  
Defect Engineering ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes ◽  
Selection Of

AbstractSingle-walled carbon nanotubes (SWCNTs) have been modified with ester groups using typical organic radical chemistry. Consequently, traps for mobile excitons have been created, which enhanced the optical properties of the material. The proposed methodology combines the benefits of mainstream approaches to create luminescent defects in SWCNTs while it simultaneously avoids their limitations. A step change was achieved when the aqueous medium was abandoned. The selection of an appropriate organic solvent enabled much more facile modification of SWCNTs. The presented technique is quick and versatile as it can engage numerous reactants to tune the light emission capabilities of SWCNTs. Importantly, it can also utilize SWCNTs sorted by chirality using conjugated polymers to enhance their light emission capabilities. Such differentiation is conducted in organic solvents, so monochiral SWCNT can be directly functionalized using the demonstrated concept in the same medium without the need to redisperse the material in water.

Degradable Conjugated Polymers: Synthesis and Applications in Enrichment of Semiconducting Single-Walled Carbon Nanotubes

2011 ◽  
Vol 21 (9) ◽  
pp. 1643-1651 ◽  
Author(s):  
Wei Zhi Wang ◽  
Wei Feng Li ◽  
Xiao Yong Pan ◽  
Chang Ming Li ◽  
Lain-Jong Li ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Conjugated Polymers ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

scholarly journals Chromatic Conductive Polymer Nanocomposites of Poly (p-Phenylene Ethynylene)s and Single-Walled Carbon Nanotubes

2021 ◽  
Vol 5 (6) ◽  
pp. 158
Author(s):  
Shanju Zhang ◽  
Uwe H. F. Bunz ◽  
David G. Bucknall
Keyword(s):  
Carbon Nanotubes ◽  
Conductive Polymer ◽  
Single Walled Carbon Nanotubes ◽  
Nanocomposite Films ◽  
High Mass ◽  
Phenylene Ethynylene ◽  
High Concentration ◽  
Visible Absorption ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

We report on dispersions and thin films of chromatic conductive nanocomposites of poly(p-phenylene ethynylene)s (PPEs) and single-walled carbon nanotubes (SWNTs) generated via solution mixing. The linear, conjugated PPEs with dialkyl- and dialkyloxy-side chain groups are shown to debundle and disperse high concentration (up to 2.5 mg/mL) SWNTs in various organic solvents. The solubilization of SWNTs and PPE wrapping is accompanied with the change in the solution color. Ultraviolet visible absorption spectra of nanocomposite solutions demonstrate a new absorption peak at a higher wavelength, supporting the observed chromatism. Fluorescence spectra of nanocomposite solutions display significant quenching of the fluorescence intensity and the Stern–Volmer model is used to analyze fluorescence quenching. Electron microscopy of the chromatic solid films of high mass fraction PPE/SWNT nanocomposites obtained by vacuum filtration reveals the debundled SWNTs in the PPE matrix. The tensile strength and Young’s modulus of these PPE/SWNT nanocomposite films are as high as 150 MPa and 15 GPa, respectively. The composite films exhibit remarkably high conductivities, ranging from ~1000 S/m to ~10,000 S/m for 10 wt% and 60 wt% SWNT nanocomposites, respectively.

Sign in / Sign up

Export Citation Format

Share Document