On the Use of Glycosylated Single-Walled Carbon Nanotubes as a Coolant Additive

Nagarajan, Subhalakshmi; Dhinakaran, Manivannan Kalavathi; Kumar, Vikas; Rajaram, N.; Das, Tamal; Padmanabhan, K. A.

doi:10.1166/nnl.2011.1201

Cited by 5 publications

(4 citation statements)

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“…A dispersion of SWCNTs in an aqueous medium was prepared 173 by functionalizing the SWCNT with D-glucosamine 58. The graing resulted in a good dispersion of the SWCNTs in water of an amount less than 1 mg mL À1 .…”

Section: Sugars and Biomoleculesmentioning

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: Sugars and Biomoleculesmentioning

confidence: 99%

Dispersion of carbon nanotubes in water and non-aqueous solvents

2013

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“…5,20-23 Solid phase magic angle spinning NMR spectroscopy has also been used to confirm covalent functionalization of nanotubes, 24-28 but this does not allow unambiguous assignment of the functional groups bound to the nanotubes. 22 Studies of covalently functionalized SWCNTs using solution-based techniques have determined 7,29,30 performance characteristics, such as efficacy and selectivity.…”

Section: Introductionmentioning

confidence: 99%

“…Carbon nanotube (CNT) functionalization increases the suitability and performance enhancement over a wide range of CNT applications. − Current and potential uses of functionalized CNTs have spawned interest in nanostructured materials, , but evidence of continued and increasing applications is required for advancing each material beyond the development stage. Reports have documented the dependence of functionalized CNT characteristics upon the synthetic route used. − Slight differences in the structure of CNTs can make large changes in sensitive applications such as pharmaceuticals, and a different functionality might result in unpredictable and unintended outcomes.…”

Section: Introductionmentioning

confidence: 99%

“…The usefulness of NMR in characterizing functionalized nanotubes was described in our previous studies, − and NMR is now increasingly being used to identify modified SWCNTs. ,− Solid phase magic angle spinning NMR spectroscopy has also been used to confirm covalent functionalization of nanotubes, − but this does not allow unambiguous assignment of the functional groups bound to the nanotubes . Studies of covalently functionalized SWCNTs using solution-based techniques have determined ,, performance characteristics, such as efficacy and selectivity.…”

Section: Introductionmentioning

confidence: 99%

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Characterizing Covalently Sidewall-Functionalized Single-Walled Carbon Nanotubes by Using¹H NMR Spectroscopy

Nelson

Kumar

2013

J. Phys. Chem. C

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Unambiguous evidence for covalent sidewall functionalization of single-walled carbon nanotubes (SWCNTs) has been a difficult task, especially for nanomaterials in which slight differences in functionality structure produce significant changes in molecular characteristics. Nuclear magnetic resonance (NMR) spectroscopy provides clear information about the structural skeleton of molecules attached to SWCNTs. In order to establish the generality of proton NMR as an analytical technique for characterizing covalently functionalized SWCNTs, we have obtained and analyzed proton NMR data of SWCNT-substituted benzenes across a variety of para substituents. Trends obtained for differences in proton NMR chemical shifts and the impact of o-, p-, and m-directing effects of electrophilic aromatic substituents on phenyl groups covalently bonded to SWCNTs are discussed.

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