Synthesis and optical characterization of carbon nanotube arrays

Rahman, Md. Mahfuzur; Younes, Hammad; Ni, George; Zhang, Tiejun; Ghaferi, Amal Al

doi:10.1016/j.materresbull.2016.01.050

Cited by 22 publications

(15 citation statements)

References 41 publications

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“…Rahman and colleagues synthesized aligned SWCNTs using annealing times of 10 s, 3 min, 10 min and 15 min. They found that the height of the SWCNT array increased from 229 µm to 246.5 µm as the catalyst annealing time was increased from 3 min to 10 min [ 7 ].…”

Section: Resultsmentioning

confidence: 99%

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Dexamethasone-Loaded, PEGylated, Vertically Aligned, Multiwalled Carbon Nanotubes for Potential Ischemic Stroke Intervention

et al. 2018

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The complete synthesis, optimization, purification, functionalization and evaluation of vertically aligned multiwalled carbon nanotubes (VA-MWCNTs) was reported for potential application in dexamethasone delivery to the ischemic brain tissue. The conditions for high yield were optimized and carbon nanotubes functionalized and PEGylated prior to dexamethasone loading. Morphological changes were confirmed by SEM and TEM. Addition of functional groups to MWCNTs was demonstrated by FTIR. Thermal stability reduced following MWCNTs functionalization as demonstrated in TGA. The presence of carbon at 2θ of 25° and iron at 2θ of 45° in MWCNTs was illustrated by XRD. Polydispersive index and zeta potential were found to be 0.261 and −15.0 mV, respectively. Dexamethasone release increased by 55%, 65% and 95% in pH of 7.4, 6.5 and 5.5 respectively as evaluated by UV-VIS. The functionalized VA-MWCNTs were demonstrated to be less toxic in PC-12 cells in the concentration range from 20 to 20,000 µg/mL. These findings have demonstrated the potential of VA-MWCNTs in the enhancement of fast and prolonged release of dexamethasone which could lead to the effective treatment of ischemic stroke. More work is under way for targeting ischemic sites using atrial natriuretic peptide antibody in stroke rats.

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Section: Resultsmentioning

confidence: 99%

“…A precursor, ferrocene, is dissolved in organic solvent which also serves as a carbon source. It is based on the hydrocarbon decomposition on metallic catalysts such as iron, nickel, cobalt and molybdenum [ 7 ].…”

Section: Introductionmentioning

confidence: 99%

Dexamethasone-Loaded, PEGylated, Vertically Aligned, Multiwalled Carbon Nanotubes for Potential Ischemic Stroke Intervention

et al. 2018

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“…Template-assisted chemical vapour deposition growth: Chemical Vapour Deposition (CVD) is one of the ways to grow 3D grapheme [25][26][27][28][29][30][31][32]. It entails using pre-fabricated 3D metal substrates for example Ni foam.…”

Section: Direct Synthesis Of 3d Graphenementioning

confidence: 99%

Three-Dimensional Graphene Interconnected Structure, Fabrication Methods and Applications: Review

Bagoole¹,

Rahman²,

Younes³

et al. 2017

J Nanomed Nanotechnol

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“…The thermal conductivity of CNTs is more than seven times higher than that of copper, which is well known for having a good thermal conductivity of 385 W/Mk [19][20][21][22]. Because of their remarkable thermal, electrical, mechanical properties, and low density, carbon nanotubes are ideal materials for reinforcement in composites [23][24][25][26][27], sensors [28], and many other applications, such as thermal managements [29][30][31].…”

Section: Carbon Nanotubesmentioning

confidence: 99%

Nanofluids Based on Carbon Nanostructures

Younes¹,

Ghaferi²,

Saadat³

et al. 2016

Advances in Carbon Nanostructures

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A nanofluid consists in a liquid suspension of nanometer-sized particles. These fluids may contain (or not) surface-active agents to aid in the suspension of the particles. Nanometer-sized particles have higher thermal conductivity than the base fluids. Oxides, metals, nitrides, and nonmetals, like carbon nanotubes, can be used as nanoparticles in nanofluids. Water, ethylene glycol, oils, and polymer solutions can be used as base fluids. In this chapter, we summarize the recent studies of using CNTs and graphene to improve the thermal conductivity of nanofluids. Moreover, we refer to the studies about the effect of using magnetic fields on enhancing the thermal conductivity of nanofluids. Too much discrepancy about thermal conductivity of nanofluids can be found in the literature. For carbon nanofluids, unfortunately, no significant improvements on thermal conductivity are observed using low concentrations. Different improvement percentages have been reported. This variation in the thermal conductivity can be attributed to many factors, such as particle size temperature, pH, or zeta potential. We believe that more research efforts need to be made in order to, first, improve the thermal conductivity of nanofluids and, second, assess the effect of the different parameters and conditions on the thermal conductivity of nanofluids.

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Synthesis and optical characterization of carbon nanotube arrays

Cited by 22 publications

References 41 publications

Dexamethasone-Loaded, PEGylated, Vertically Aligned, Multiwalled Carbon Nanotubes for Potential Ischemic Stroke Intervention

Dexamethasone-Loaded, PEGylated, Vertically Aligned, Multiwalled Carbon Nanotubes for Potential Ischemic Stroke Intervention

Three-Dimensional Graphene Interconnected Structure, Fabrication Methods and Applications: Review

Nanofluids Based on Carbon Nanostructures

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