Methodology for Homogeneous Dispersion of Single-walled Carbon Nanotubes by Physical Modification

Fujigaya, Tsuyohiko; Nakashima, Naotoshi

doi:10.1295/polymj.pj2008039

Cited by 130 publications

(97 citation statements)

References 223 publications

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“…Pyrenes: In the past decade, pyrene derivatives have been successfully used to stabilize CNTs dispersions, [209] and as in the case of NMP, they have been adopted for UILPE of graphite. [210][211][212][213][214][215][216][217][218] Noteworthy, DSAs suitable for dispersing CNTs with a curved surface may not always be ideal for dispersing graphene with a flat surface.…”

Section: Polycyclic Aromatic Hydrocarbonsmentioning

confidence: 99%

Supramolecular Approaches to Graphene: From Self‐Assembly to Molecule‐Assisted Liquid‐Phase Exfoliation

2016

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Graphene, a one-atom thick two-dimensional (2D) material, is at the core of an ever-growing research effort due to its combination of unique mechanical, thermal, optical and electrical properties. Two strategies are being pursued for the graphene production: the bottom-up and the top-down. The former relies on the use of covalent chemistry approaches on properly designed molecular building blocks undergoing chemical reaction to form 2D covalent networks. The latter occurs via exfoliation of bulk graphite into individual graphene sheets. Amongst the various types of exfoliations exploited so far, ultrasound-induced liquid-phase exfoliation (UILPE) is an attractive strategy, being extremely versatile, up-scalable and applicable to a variety of environments. In this review, we highlight the recent developments that have led to successful non-covalent functionalization of graphene and how the latter can be exploited to promote the process of molecule-assisted UILPE of graphite. The functionalization of graphene with non-covalently interacting molecules, both in dispersions as well as in dry films, represents a promising and modular approach to tune various physical and chemical properties of graphene, eventually conferring to such a 2D system a multifunctional nature.

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Section: Polycyclic Aromatic Hydrocarbonsmentioning

confidence: 99%

Supramolecular Approaches to Graphene: From Self‐Assembly to Molecule‐Assisted Liquid‐Phase Exfoliation

2016

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“…DNA would bind to the sidewall of the SWNTs through π-π interactions. 17,25 The DNA-SWNT prepared in this study showed an exothermic generation by NIR irradiation as did the acid-treated SWNTs. A concentration-dependent heat generation was clearly observed for the in vitro and in vivo measurements ( Figures 5B and 6B).…”

Section: In Vitromentioning

confidence: 80%

Dispersion stability and exothermic properties of DNA-functionalized single-walled carbon nanotubes

Kawaguchi¹,

Ohno²,

Irie³

et al. 2011

IJN

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Carbon nanotubes act as a photon antenna that serves as an effective “molecular heater” around the near-infrared (NIR) region. This exothermic generation can be used as a possible heating source for hyperthermia therapy. The current study reports the dispersible and exothermic properties with NIR irradiation for single-walled carbon nanotubes (SWNTs) treated with a strong acid (acid-treated SWNTs), and the SWNTs further functionalized with double-stranded DNA (DNA-functionalized SWNTs: DNA-SWNTs). DNA-SWNTs significantly improved the dispersibility of SWNTs when compared with the acid-treated SWNTs. The binding ratio of the acid-treated SWNT and DNA was calculated to be 3.1 (DNA/SWNTs) from the phosphorous content in the DNA-SWNT. This interaction of the SWNTs and DNA would contribute to the stable dispersion of the DNA-SWNTs in a culture medium. With NIR irradiation by a halogen lamp light source, the acid-treated SWNTs and the DNA-SWNTs showed strong heat evolution in vitro (in a culture medium) and in vivo (in the subcutaneous tissue of a mouse) condition without any invasive effect on the non-SWNT area. The results of this study suggested that the functionalization with DNA was an efficient approach to improve the dispersibility of SWNTs in body fluids, and the DNA-SWNT would be a promising source for photo-induced exothermic generation.

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“…This is again underscoring the importance of the electron defi cient perylene bisimide core that bears great potential to outperform pyrene derivatives that have been widely applied as nanotube anchor systems. [ 59 ] The difference between the pyrene and perylene bisimide unit and the impact on SWCNT-surfactant interactions is furthermore refl ected in different affi nities towards smaller and larger diameter SWCNTs, respectively. While pyrene exhibits a more pronounced affi nity towards SWCNTs with larger diameters (smaller bandgap), [ 84 ] the anionic PBIs follow the opposite trend.…”

Section: Progress Reportmentioning

confidence: 99%

The Potential of Perylene Bisimide Derivatives for the Solubilization of Carbon Nanotubes and Graphene

2011

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Carbon nanotubes and graphene are outstanding materials of the 21st century with a broad spectrum of applications. However, major challenges are faced such as the intrinsically low solubility of both sp2 carbon allotropes. To overcome this hurdle the potential of noncovalent functionalization is summarized with a special focus on the establishment of the perylene bisimide unit as aromatic anchor to the graphitic surface. Rational surfactant design is unmasked as the key to solubilization of the carbon allotropes, while at the same time tailoring their surface properties, or even electronic properties in a fully reversible fashion.

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Methodology for Homogeneous Dispersion of Single-walled Carbon Nanotubes by Physical Modification

Cited by 130 publications

References 223 publications

Supramolecular Approaches to Graphene: From Self‐Assembly to Molecule‐Assisted Liquid‐Phase Exfoliation

Supramolecular Approaches to Graphene: From Self‐Assembly to Molecule‐Assisted Liquid‐Phase Exfoliation

Dispersion stability and exothermic properties of DNA-functionalized single-walled carbon nanotubes

The Potential of Perylene Bisimide Derivatives for the Solubilization of Carbon Nanotubes and Graphene

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