Colloidal Particles Coated and Stabilized by DNA-Wrapped Carbon Nanotubes

Ek, Hobbie; Bj, Bauer; Stephens, Jean S.; Becker, ML; McGuiggan, Patricia; Sd, Hudson; Wang, H

doi:10.1021/la051827f

Cited by 54 publications

(54 citation statements)

References 21 publications

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“…Additionally, if one chooses, oligonucleotides can be removed using small aromatic molecules such as rhodamine 6G or the complementary DNA strand, once any necessary processing is complete [99] . A variety of different applications, such as fibre spinning [102] ; self-assembled nanotube field-effect transistors [103] ; stabilization of colloidal particles [104] ; chemical sensing [105] ; and both medical diagnostic and biological fields [100,[106][107][108][109] have been investigated for DNA-dispersed SWNTs.…”

Section: Biomoleculesmentioning

confidence: 99%

Liquid‐Phase Exfoliation of Nanotubes and Graphene

Coleman

2009

Adv Funct Materials

601

536

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Many applications of carbon nanotubes require the exfoliation of the nanotubes to give individual tubes in the liquid phase. This requires the dispersion, exfoliation and stabilisation of nanotubes in a variety of liquids. In this paper we review recent work in this area, focusing on results from the author's group. We begin by reviewing stabilisation mechanisms before exploring research into the exfoliation of nanotubes in solvents, by using surfactants or biomolecules and by covalent attachment of molecules.The concentration dependence of the degree of exfoliation in each case will be highlighted. In addition we will discuss research into the dispersion mechanism for each dispersant type. Most importantly we have compared dispersion quality metrics for all dispersants. From this analysis, we conclude that functionalised nanotubes can be exfoliated to the greatest degree. Finally, we review the extension of this work to the liquid phase exfoliation of graphite to give graphene.

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Section: Biomoleculesmentioning

confidence: 99%

Liquid‐Phase Exfoliation of Nanotubes and Graphene

Coleman

2009

Adv Funct Materials

601

536

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“…Recent advances in particle synthesis [4][5][6][7][8][9][10][11] have significantly extended the structural landscape via the development of colloidal particles that are anisotropic both in shape and surface chemistry, thus providing an unlimited number of building blocks that can spontaneously organize into an unprecedented variety of structures with potentially novel functional, mechanical, and optical properties. For this reason, the problem of self-assembly of nanoparticles is today under intense investigation.…”

Section: Introductionmentioning

confidence: 99%

Packing of Soft Asymmetric Dumbbells

2010

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We use numerical simulations to study the phase behavior of a system of purely repulsive soft dumbbells as a function of size ratio of the two components and their relative degree of deformability. We find a plethora of different phases which includes most of the mesophases observed in self-assembly of block copolymers, but also crystalline structures formed by asymmetric, hard binary mixtures. Our results detail the phenomenological behavior of these systems when softness is introduced in terms of two different classes of inter-particle interactions: (a) the elastic Hertz potential, that has a finite energy cost for complete overlap of any two components, and (b) a generic power-law repulsion with tunable exponent. We discuss how simple geometric arguments can be used to account for the large structural variety observed in these systems, and detail the similarities and differences in the phase behavior for the two classes of potentials under consideration.

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“…[12] The effect of stabilization is reached by treating nanotubes with short segments of single-stranded DNA. [13] Carbon nanotubesilica nanohybrids can also be used as stabilizers of water-inoil (w=o) emulsions, regardless of the water=oil volume ratio used. [14] Using nanotubes in interface layers as stabilizers opens up the possibility of combining this function with the opportunity to use them as a catalyst for reactions which are carried out in a biphasic mixture of two immiscible solvents.…”

Section: Introductionmentioning

confidence: 99%

Multi-Walled Carbon Nanotubes as a Cosurfactant for Highly Concentrated Emulsions

Masalova¹,

Kharatyan²,

Malkin³

2013

Journal of Dispersion Science and Technology

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GRAPHICAL ABSTRACTThe role of multi-wall carbon nanotubes (MWCNT) as a solid surfactant in highly concentrated water-in-oil emulsions was investigated. MWCNT were dispersed in the oil phase. These suspensions are viscoplastic fluids with the yield stress increasing by more than 1000 times with addition of 2% MWCNT, which demonstrates intensive ''structurizing'' ability. After emulsion preparation, MWCNT were concentrated at the interface, stabilizing emulsions. The dependence of the inversion point on MWCNT concentration was found. Emulsions containing up to 94 wt% of the aqueous phase can be prepared only when MWCNT is combined with conventional surfactant. Rheological properties of such compositions were measured. It was established that emulsions stabilized by a combined surfactant were more stable in comparison to conventional surfactant stabilized emulsion.

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Colloidal Particles Coated and Stabilized by DNA-Wrapped Carbon Nanotubes

Cited by 54 publications

References 21 publications

Liquid‐Phase Exfoliation of Nanotubes and Graphene

Liquid‐Phase Exfoliation of Nanotubes and Graphene

Packing of Soft Asymmetric Dumbbells

Multi-Walled Carbon Nanotubes as a Cosurfactant for Highly Concentrated Emulsions

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