Few-layer nano-graphene structures with large surface areas synthesized on a multifunctional Fe:Mo:MgO catalyst system

Dervishi, Enkeleda; Biriş, Alexandru R.; Watanabe, Fumiya; Umwungeri, Jean Luc; Mustafa, Thikra; Driver, Joshua A.; Biris, Alexandru S.

doi:10.1007/s10853-011-5980-z

Cited by 19 publications

(22 citation statements)

References 54 publications

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“…Gn structures were synthesized on Fe/Mo/MgO (1 : 0.1 : 110 molar ratio). The catalyst system was prepared as previously reported (Dervishi et al , ). The graphitic nanomaterials were synthesized using an RF generator in an argon methane environment.…”

Section: Methodsmentioning

confidence: 99%

Single‐walled carbon nanotube and graphene nanodelivery of gambogic acid increases its cytotoxicity in breast and pancreatic cancer cells

Saeed

Mahmood

Pyrek

et al. 2014

J of Applied Toxicology

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Graphene and single-walled carbon nanotubes were used to deliver the natural low-toxicity drug gambogic acid (GA) to breast and pancreatic cancer cells in vitro, and the effectiveness of this complex in suppressing cellular integrity was assessed. Cytotoxicity was assessed by measuring lactate dehydrogenase release, mitochondria dehydrogenase activity, mitochondrial membrane depolarization, DNA fragmentation, intracellular lipid content, and membrane permeability/caspase activity. The nanomaterials showed no toxicity at the concentrations used, and the antiproliferative effects of GA were significantly enhanced by nanodelivery. The results suggest that these complexes inhibit human breast and pancreatic cancer cells grown in vitro. This analysis represents a first step toward assessing their effectiveness in more complex, targeted, nanodelivery systems.

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Section: Methodsmentioning

confidence: 99%

Single‐walled carbon nanotube and graphene nanodelivery of gambogic acid increases its cytotoxicity in breast and pancreatic cancer cells

Saeed

Mahmood

Pyrek

et al. 2014

J of Applied Toxicology

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“…Moreover, crystalline nano‐graphene structures were synthesized over a high‐yield Fe:Mo:MgO catalyst system, while varying the amount of active metals 24. Interestingly, methane generated graphitic nanostructures with larger dimensions and a smaller surface area that decomposed at lower temperatures, when compared to the structures synthesized from acetylene.…”

Section: Introductionmentioning

confidence: 99%

“…Interestingly, methane generated graphitic nanostructures with larger dimensions and a smaller surface area that decomposed at lower temperatures, when compared to the structures synthesized from acetylene. Additionally, the amount of metal loading in this multifunctional catalyst system had a strong effect on the type and the morphological properties of the resulting carbon nanostructures, such as high purity and crystalline carbon nanotubes or graphene sheets 24…”

Section: Introductionmentioning

confidence: 99%

Real‐Time Probing of Ion Pairing Dynamics with 2DIR Spectroscopy

Park

Choi

et al. 2010

ChemPhysChem

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Chemical exchange two-dimensional infrared (2DIR) spectroscopy is applied to investigate ion pairing dynamics occurring on picosecond timescales. SeCN(-) ion is used as a vibrational probe. The SeCN(-) ion dissolved in N,N-dimethyl formamide (DMF) has a sufficiently long vibrational lifetime and can form a contact ion pair with Li(+) ion in DMF. The CN stretch frequency of the contact ion pair is significantly blue-shifted from that of free SeCN(-) so the free SeCN(-) ion can be spectrally distinct from the contact ion pair in DMF. Therefore, we were able to directly monitor the ion pairing dynamics of Li(+) and SeCN(-) in real time by using ultrafast 2DIR spectroscopy. As a result, we have determined the dissociation time constant of the LiSeCN contact ion pair to be 420±40 ps.

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“…4, the pressures of molecular hydrogen in bubbles increase gradually with the increment of dimensions of graphene sheets until reached the maximum pressure. Here, the ultimate internal pressures of [21]. The low pressure obtained by waqar in [15] may be caused by the large sizes of bubbles.…”

Section: The Maximum Pressure Inside Bubblesmentioning

confidence: 97%

“…The proposed hydrogen storage in graphene bubble systems has been experimentally proven [7,15,21,22]. However, to the best of our knowledge, there is a lack of theoretical survey concerning hydrogen storage capability of the graphene bubble structures in scientific literature.…”

Section: Introductionmentioning

confidence: 99%

Molecular dynamic investigations of hydrogen storage efficiency of graphene sheets with the bubble structure

et al. 2014

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In this paper, we designed a new type of 3D graphene bubble structure for hydrogen storage in theory. The graphene-based structures are constructed with different sizes of semi-ellipsoidal graphene bubbles. The hydrogen storage efficiency of the graphene bubble structures at ambient conditions (P = 1.0 bar and T = 300 K) is calculated using molecular dynamic (MD) simulations. The effects of number of graphene layers and density and size of bubbles are systematically investigated in the isothermal-isobaric (NPT) ensemble. The MD results reveal that at ambient conditions, the bubble models can achieve the highest volumetric hydrogen storage efficiency of *45 kg/m 3 and gravimetric hydrogen storage efficiency of *3.75 wt%. The maximum pressures in the bubbles are also evaluated.

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Few-layer nano-graphene structures with large surface areas synthesized on a multifunctional Fe:Mo:MgO catalyst system

Cited by 19 publications

References 54 publications

Single‐walled carbon nanotube and graphene nanodelivery of gambogic acid increases its cytotoxicity in breast and pancreatic cancer cells

Single‐walled carbon nanotube and graphene nanodelivery of gambogic acid increases its cytotoxicity in breast and pancreatic cancer cells

Real‐Time Probing of Ion Pairing Dynamics with 2DIR Spectroscopy

Molecular dynamic investigations of hydrogen storage efficiency of graphene sheets with the bubble structure

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