scholarly journals Various responses of single-walled carbon nanotubes with differing chirality: A suggestion for biosensing

2019 ◽  
Vol 28 (1) ◽  
pp. 51-56 ◽  
Author(s):  
Kazuo Umemura ◽  
Yu Sato ◽  
Yu Ishibashi ◽  
Masahito Ito ◽  
Yoshikazu Homma
Keyword(s):  
Carbon Nanotubes ◽  
Physicochemical Properties ◽  
Near Infrared ◽  
Single Walled Carbon Nanotubes ◽  
Photoluminescence Intensity ◽  
Single Walled Carbon ◽  
Near Infrared Spectra ◽  
Walled Carbon Nanotubes ◽  
Antioxidant Effects ◽  
Spectral Responses

The near infrared absorbance and near infrared photoluminescence intensity of several single-walled carbon nanotubes (SWNTs) with different chiralities in the same suspension were analyzed. Differing chirality of the SWNTs showed different spectral responses with adsorbed H2O2 and catechin. While the detection of the antioxidant effects of catechin and Japanese tea using hybrids of DNA and SWNTs have previously been reported, those studies did not focus on the effects of chirality of the SWNTs on near infrared spectra. Chirality of SWNTs is one of the most important parameters to determine SWNT physicochemical properties. For example, the responses of (10,5)/(8,7) were more drastic in contrast to (9,4), while the (6,5) SWNTs were inactive. The findings indicate that different information can be obtained using mixed chiralities of SWNTs. The data suggest that the chirality effects reported from various studies should be evaluated carefully, considering the different SWNT chiralities.

scholarly journals In vivo biosensing via tissue-localizable near-infrared-fluorescent single-walled carbon nanotubes

2013 ◽  
Vol 8 (11) ◽  
pp. 873-880 ◽  
Author(s):  
Nicole M. Iverson ◽  
Paul W. Barone ◽  
Mia Shandell ◽  
Laura J. Trudel ◽  
Selda Sen ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Near Infrared ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

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.

scholarly journals Effect of Electrochemical Oxidation on Physicochemical Properties of Fe‐Containing Single‐Walled Carbon Nanotubes

2020 ◽  
Vol 7 (19) ◽  
pp. 4136-4143
Author(s):  
Elli Leppänen ◽  
Sami Sainio ◽  
Hua Jiang ◽  
Bjørn Mikladal ◽  
Ilkka Varjos ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Physicochemical Properties ◽  
Electrochemical Oxidation ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes
Sign in / Sign up

Export Citation Format

Share Document