The effects of phenolic hydrogens and methyl substitute groups in organic dyes on their dispersion of multiple-walled carbon nanotubes

Zhang, Wei; Silva, S. Ravi P.

doi:10.1016/j.carbon.2010.02.017

Cited by 16 publications

(5 citation statements)

References 17 publications

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“…The dye molecules can be removed by heat treatment at 300 C for 5 h following washing with water. In addition, bromocresol green 33 (BCG) and bromophenol blue 34 (BPB) in acidic and basic forms were used 119 as dispersing agents to suspend MWCNTs in deionized water. Both these dyes exhibited critical concentrations in dispersing MWCNTs; this may result from the formation of dye micelles, which induces osmotic pressure on MWCNTs and aids nanotube re-aggregation.…”

Section: Other Organic and Coordination Compoundsmentioning

confidence: 99%

Dispersion of carbon nanotubes in water and non-aqueous solvents

2013

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Contemporary methods for dispersion of carbon nanotubes in water and non-aqueous media are discussed. Most attention is paid to ultrasonic and plasma techniques and other physical techniques, as well as to the use of surfactants, functionalizing and debundling agents of distinct nature (elemental substances, metal and organic salts, mineral and organic acids, oxides, inorganic and organic peroxides, organic sulfonates, polymers, dyes, natural products, biomolecules, and coordination compounds). Special studies on CNTs solubilization are examined.

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Section: Other Organic and Coordination Compoundsmentioning

confidence: 99%

Dispersion of carbon nanotubes in water and non-aqueous solvents

2013

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“…The bands at 1581 cm À1 and 1390 cm À1 , correspond, respectively to the C-C bond in the ring and to sulphate ion connected to the aromatic ring. 32…”

Section: Raman Spectroscopymentioning

confidence: 99%

Electroless methods for molecular doping of gold thin films

Naor

Avnir

2014

J. Mater. Chem. C

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We developed electroless-based methods for entrapping molecules within gold thin films, molecule@Au. These doping procedures extend the potential library electroless formed films much beyond its classical application of pure metals. A detailed study shows that adsorption on gold films and entrapment within it provide distinctly different modified thin films. Significantly, molecules that cannot be adsorbed, do form an organic-metallic hybrid by the developed entrapment processes. We also report on the ability to observe enhanced Raman and fluorescence spectra from the dopant molecules within the gold thin films.

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“…Particularly, it has been demonstrated that a diazo dye molecule, Congo Red, efficiently improves the dispersion of MWCNT in water 10 without damaging the molecular characteristics of carbon nanotubes and thus preserving their properties. To go further in the understanding of solubility of carbon nanotubes, Zhang et al 11 recently studied the effect of methyl substitutes of organic dyes in the dispersion of MWCNT, and Ham et al 12 related Hansen solubility parameters of different solvents with molar volumes of the surfactants groups with the dispersion of single-walled carbon nanotubes.…”

Section: Introductionmentioning

confidence: 99%

Stable Solutions of Multiwalled Carbon Nanotubes Using an Azobenzene Dye

et al. 2010

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We present a method to achieve stable dispersions of multiwalled carbon nanotubes (MWCNT) in tetrahydrofuran for several days. The physical chemistry of this method is based on the π-π stacking interactions between MWCNT and an azobenzene derivative, Disperse Orange 3 (DO3). Evidence of this interaction was obtained using UV-vis absorption spectroscopy. Our results suggest that there is a weight ratio DO3/MWCNT beyond which interactions are strong enough to achieve stable dispersions of MWCNT for at least 45 days.

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The effects of phenolic hydrogens and methyl substitute groups in organic dyes on their dispersion of multiple-walled carbon nanotubes

Cited by 16 publications

References 17 publications

Dispersion of carbon nanotubes in water and non-aqueous solvents

Dispersion of carbon nanotubes in water and non-aqueous solvents

Electroless methods for molecular doping of gold thin films

Stable Solutions of Multiwalled Carbon Nanotubes Using an Azobenzene Dye

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