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Non-covalent polymer wrapping of carbon nanotubes and the role of wrapped polymers as functional dispersants

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ABSTRACT

Carbon nanotubes (CNTs) have been recognized as a promising material in a wide range of applications from biotechnology to energy-related devices. However, the poor solubility in aqueous and organic solvents hindered the applications of CNTs. As studies have progressed, the methodology for CNT dispersion was established. In this methodology, the key issue is to covalently or non-covalently functionalize the surfaces of the CNTs with a dispersant. Among the various types of dispersions, polymer wrapping through non-covalent interactions is attractive in terms of the stability and homogeneity of the functionalization. Recently, by taking advantage of their stability, the wrapped-polymers have been utilized to support and/or reinforce the unique functionality of the CNTs, leading to the development of high-performance devices. In this review, various polymer wrapping approaches, together with the applications of the polymer-wrapped CNTs, are summarized.

No MeSH data available.


(left) Schematic drawing of PEGylation of DNA/SWCNTs with PLL-g-PEG based on the electrostatic interaction. (right) Plots of the number of cells containing SWCNTs as a function of the incubation time. Dramatic enhancement of the cell uptake efficiency is achieved after the PEGylation. Reproduced from T Fujigaya et al 2011 Nanoscale3 4365. Copyright 2011 Royal Society of Chemistry.
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Figure 26: (left) Schematic drawing of PEGylation of DNA/SWCNTs with PLL-g-PEG based on the electrostatic interaction. (right) Plots of the number of cells containing SWCNTs as a function of the incubation time. Dramatic enhancement of the cell uptake efficiency is achieved after the PEGylation. Reproduced from T Fujigaya et al 2011 Nanoscale3 4365. Copyright 2011 Royal Society of Chemistry.

Mentions: In our group, negatively charged ssDNA-wrapped SWCNTs were further hybridized by positively charged poly(L-lysine) grafted by polyethylene glycol (PLL-g-PEG) (figure 26). We found that the obtained ternary hybrid exhibited a dramatic enhancement in the cell uptake efficiency compared to that of the SWCNT wrapped by ssDNA without PLL-g-PEG [57]. In this system, since unbound DNA can be removed prior to the hybridization due to the stable wrapping of ssDNA on SWCNTs, the contamination of the composite without containing SWCNTs was avoided.


Non-covalent polymer wrapping of carbon nanotubes and the role of wrapped polymers as functional dispersants
(left) Schematic drawing of PEGylation of DNA/SWCNTs with PLL-g-PEG based on the electrostatic interaction. (right) Plots of the number of cells containing SWCNTs as a function of the incubation time. Dramatic enhancement of the cell uptake efficiency is achieved after the PEGylation. Reproduced from T Fujigaya et al 2011 Nanoscale3 4365. Copyright 2011 Royal Society of Chemistry.
© Copyright Policy - open-access
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC5036478&req=5

Figure 26: (left) Schematic drawing of PEGylation of DNA/SWCNTs with PLL-g-PEG based on the electrostatic interaction. (right) Plots of the number of cells containing SWCNTs as a function of the incubation time. Dramatic enhancement of the cell uptake efficiency is achieved after the PEGylation. Reproduced from T Fujigaya et al 2011 Nanoscale3 4365. Copyright 2011 Royal Society of Chemistry.
Mentions: In our group, negatively charged ssDNA-wrapped SWCNTs were further hybridized by positively charged poly(L-lysine) grafted by polyethylene glycol (PLL-g-PEG) (figure 26). We found that the obtained ternary hybrid exhibited a dramatic enhancement in the cell uptake efficiency compared to that of the SWCNT wrapped by ssDNA without PLL-g-PEG [57]. In this system, since unbound DNA can be removed prior to the hybridization due to the stable wrapping of ssDNA on SWCNTs, the contamination of the composite without containing SWCNTs was avoided.

View Article: PubMed Central - PubMed

ABSTRACT

Carbon nanotubes (CNTs) have been recognized as a promising material in a wide range of applications from biotechnology to energy-related devices. However, the poor solubility in aqueous and organic solvents hindered the applications of CNTs. As studies have progressed, the methodology for CNT dispersion was established. In this methodology, the key issue is to covalently or non-covalently functionalize the surfaces of the CNTs with a dispersant. Among the various types of dispersions, polymer wrapping through non-covalent interactions is attractive in terms of the stability and homogeneity of the functionalization. Recently, by taking advantage of their stability, the wrapped-polymers have been utilized to support and/or reinforce the unique functionality of the CNTs, leading to the development of high-performance devices. In this review, various polymer wrapping approaches, together with the applications of the polymer-wrapped CNTs, are summarized.

No MeSH data available.