Carbon nanotube arrays decorated with multi-layer graphene-nanopetals enhance mechanical strength and durability

Kumar, Anurag; Maschmann, Matthew R.; Hodson, Stephen L.; Baur, Jeffery W.; Fisher, Timothy S.

doi:10.1016/j.carbon.2014.11.060

Cited by 26 publications

(32 citation statements)

References 40 publications

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“…As shown in Fig. S3 (Supplementary material), Raman spectrum of GF shows three typical peaks of graphene, centered at 1580, 2450, and 2720 cm −1 , corresponding to its G, G*, and 2D bands [26]. The G band is indicative of ordered graphitic crystallites of carbon (sp 2 ).…”

Section: Gf-fe 3 O 4 Nanocomposite Electrodementioning

confidence: 96%

Revisiting the origin of cycling enhanced capacity of Fe3O4 based nanostructured electrode for lithium ion batteries

et al. 2017

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We identify that reversible formation/decomposition of lithium oxide, pulverization of Fe 3 O 4 nanoparticles, and electrolyte reactions, are contributors to the enhanced capacity observed in the Fe 3 O 4 electrode upon long cycling. Introducing three-dimensional graphene foam to form a composite with Fe 3 O 4 nanoparticles largely increases the capacity (~1220 mA h g −1 vs.~690 mA h g −1) and promotes the cycling induced capacity enhancement (an earlier capacity rise and a faster rising rate) of the Fe 3 O 4 electrode. Together with Fe 3 O 4 nanoparticles, the presence of graphene effectively promotes the electrolyte reactions and reversible formation/ decomposition of lithium oxide. At the same time, activation of GF also occurs in the presence of Fe 3 O 4 nanoparticles, further increases the capacity of the nanocomposite.

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Section: Gf-fe 3 O 4 Nanocomposite Electrodementioning

confidence: 96%

Revisiting the origin of cycling enhanced capacity of Fe3O4 based nanostructured electrode for lithium ion batteries

et al. 2017

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“…Stiffness of individual nanopetal measured as 10 4 -10 5 Pa [41] and surface roughness of the nanopetals, which is approximately 500 nm [42], may affect the cell adhesion. The petal size can be regulated by the plasma power, thus the surface roughness can be modified as required.…”

Section: Resultsmentioning

confidence: 99%

Guidance of cell adhesion and migration by graphitic nanopetals on carbon fibers

et al. 2016

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Carbon-based nanomaterials have emerged in a wide variety of applications because of their tunable mechanical, electrical, chemical and optical properties. However, poor cellular adhesion makes their use significantly limited in tissue engineering and regenerative medicines. In order to address this challenge, we studied interactions of fibroblast and epithelial cells with graphitic nanopetal structures grown on carbon fibers. We found that all the cell types studied attached to and migrated along the nanopetal coated carbon fibers, but not to the non-coated fibers. The petals' nanoscale irregular geometry is thought to enhance cellular adhesion and migration. Further understanding of the mechanisms of this interaction and improvising this method may be useful to design novel tissue engineering strategies using carbon-based nanomaterials.

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“…The mechanical responses of CNT sponges can be tailored significantly by coating the CNTs with different materials [32][33][34]. For example, coating the CNT sponges with a uniform conformal coating of 10-30 nm thick amorphous carbon has been shown to improve the elasticity and fatigue resistance, allowing the sponges to sustain ~1000 compression cycles without severe damage [33].…”

Section: Introductionmentioning

confidence: 99%

“…Coating CNT sponges with graphene has also been shown to improve their mechanical properties [32,34]. The presence of graphene overcoats on individual CNTs and at the nodal junctions of their network improved the Young's modulus of the CNT sponges by a factor of 6 [32], and increased the buckling load and energy absorption by a factor of 60 [34]. The fatigue resistance has also been improved by the graphene addition, where samples survived ~2000 cycles at 60% strain and ~1 million cycles at 2% strain without significant permanent damage [32].…”

Section: Introductionmentioning

confidence: 99%

Impact absorption properties of carbon fiber reinforced bucky sponges

Thevamaran¹,

Saini²,

Karakaya³

et al. 2017

Nanotechnology

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We describe the super compressible and highly recoverable response of bucky sponges as they are struck by a heavy flat-punch striker. The bucky sponges studied here are structurally stable, self-assembled mixtures of multiwalled carbon nanotubes (MWCNTs) and carbon fibers (CFs). We engineered the microstructure of the sponges by controlling their porosity using different CF contents. Their mechanical properties and energy dissipation characteristics during impact loading are presented as a function of their composition. The inclusion of CFs improves the impact force damping by up to 50% and the specific damping capacity by up to 7% compared to bucky sponges without CFs. The sponges also exhibit significantly better stress mitigation characteristics compared to vertically aligned carbon nanotube foams of similar densities. We show that delamination

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Carbon nanotube arrays decorated with multi-layer graphene-nanopetals enhance mechanical strength and durability

Cited by 26 publications

References 40 publications

Revisiting the origin of cycling enhanced capacity of Fe3O4 based nanostructured electrode for lithium ion batteries

Revisiting the origin of cycling enhanced capacity of Fe3O4 based nanostructured electrode for lithium ion batteries

Guidance of cell adhesion and migration by graphitic nanopetals on carbon fibers

Impact absorption properties of carbon fiber reinforced bucky sponges

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