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Article

Optical Response Characteristics of Single-Walled Carbon Nanotube Chirality Exposed to Oxidants with Different Oxidizing Power

Department of Physics, Graduate School of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku, Tokyo 162-8601, Japan
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Academic Editors: Bryan M. Wong and Hisao Taira
Molecules 2021, 26(4), 1091; https://doi.org/10.3390/molecules26041091
Received: 26 January 2021 / Revised: 6 February 2021 / Accepted: 15 February 2021 / Published: 19 February 2021
(This article belongs to the Special Issue Green Molecules and Green Materials for Sustainable Life)
Semiconductor single-walled carbon nanotubes (SWNTs) have unique characteristics owing to differences in the three-dimensional structure (chirality) expressed by the chiral index (n,m), and many studies on the redox characteristics of chirality have been reported. In this study, we investigated the relationship between the chirality of SWNTs and the oxidizing power of oxidants by measuring the near-infrared (NIR) absorption spectra of two double-stranded DNA-SWNT complexes with the addition of three oxidants with different oxidizing powers. A dispersion was prepared by mixing 0.5 mg of SWNT powder with 1 mg/mL of DNA solution. Different concentrations of hydrogen peroxide (H2O2), potassium hexachloroidylate (IV) (K2IrCl6), or potassium permanganate (KMnO4) were added to the dispersion to induce oxidation. Thereafter, a catechin solution was added to observe if the absorbance of the oxidized dispersion was restored by the reducing action of the catechin. We found that the difference in the oxidizing power had a significant effect on the detection sensitivity of the chiralities of the SWNTs. Furthermore, we revealed a detectable range of oxidants with different oxidizing powers for each chirality. View Full-Text
Keywords: carbon nanotube; DNA; chirality; oxidizing power; near-infrared; redox carbon nanotube; DNA; chirality; oxidizing power; near-infrared; redox
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MDPI and ACS Style

Matsukawa, Y.; Umemura, K. Optical Response Characteristics of Single-Walled Carbon Nanotube Chirality Exposed to Oxidants with Different Oxidizing Power. Molecules 2021, 26, 1091. https://doi.org/10.3390/molecules26041091

AMA Style

Matsukawa Y, Umemura K. Optical Response Characteristics of Single-Walled Carbon Nanotube Chirality Exposed to Oxidants with Different Oxidizing Power. Molecules. 2021; 26(4):1091. https://doi.org/10.3390/molecules26041091

Chicago/Turabian Style

Matsukawa, Yuji, and Kazuo Umemura. 2021. "Optical Response Characteristics of Single-Walled Carbon Nanotube Chirality Exposed to Oxidants with Different Oxidizing Power" Molecules 26, no. 4: 1091. https://doi.org/10.3390/molecules26041091

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