C60(OH)n-ASSISTED DISPERSION OF SINGLE-WALLED CARBON NANOTUBES

Maeda, Yutaka; Kato, Takaaki; Higo, Junki; Hasegawa, Tadashi; Kitano, Takahiro; Tsuchiya, Takahiro; Akasaka, Takeshi; Okazaki, Toshiya; Lü, Jing; Nagase, Shigeru

doi:10.1142/s179329200800143x

Cited by 5 publications

(2 citation statements)

References 19 publications

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“…Dispersion of SWNTs in an aqueous and nonaqueous solution using amphiphilic C 60 derivatives was also achieved ( Figure 14.3) [34]. Actually, C 60 (OH) n is soluble in an aqueous alkaline solution and isopropyl alcohol (IPA).…”

Section: Dispersion Of Swnts Using C 60 Derivativesmentioning

confidence: 94%

Dispersion and Separation of Single‐Walled Carbon Nanotubes

Maeda

Akasaka

Lü

et al. 2010

Chemistry of Nanocarbons

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Recently, gel chromatography has been demonstrated as an effective method for the separation of single-walled carbon nanotubes (SWCNTs) according to their electronic type and structure. The separation of SWCNTs was thought to result from the different affinity forces between the gel and various SWCNTs. Based on this method, we investigated the effect of ultrasonic time on the dispersion and separation of metallic and semiconducting SWCNTs. At a low ultrasonic power, with the increase of ultrasonic time, better monodispersed SWCNTs in sodium dodecylsulfate (SDS) aqueous solution were obtained. The UV-visible-near infrared (UV-Vis-NIR) absorption, Raman and photoluminescence (PL) spectroscopic characterizations confirmed that under the condition of ultrasonication (2 h), higher-purity metallic tubes and semiconducting tubes with different diameter distributions could be obtained. We believe that the control of the ultrasonication time may tune the mono-dispersity and the length of SWCNTs, which would further influence the difference in affinity forces between various SWCNTs and the gel, therefore leading to different separation results.

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Section: Dispersion Of Swnts Using C 60 Derivativesmentioning

confidence: 94%

Dispersion and Separation of Single‐Walled Carbon Nanotubes

Maeda

Akasaka

Lü

et al. 2010

Chemistry of Nanocarbons

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show abstract

“…Various types of dispersant reagents have been investigated, including surfactants, p-conjugated compounds, amine, and polymers. It was reported that chiral-index-selective dispersion and PL wavelength shifts [8][9][10][11][12][13] occur depending on the solvents and dispersant reagents; therefore, the dispersion conditions are important for chiral index assignment and for evaluating the proportions of the different chiral SWCNTs in a mixture.…”

Section: Introductionmentioning

confidence: 99%