In situ engineering of NanoBud geometries

Nicholls, Rebecca J.; Britton, Jude; Meysami, Seyyed Shayan; Koós, Antal A.; Grobert, Nicole

doi:10.1039/c3cc46064a

Cited by 16 publications

(11 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Various structural kinds of carbon nanobuds, all of which are stable, can exist and they can be transformed to each other. This process can be visualized and monitored by TEM . Upon EB (electron beam) irradiation, the fullerene section can be rearranged into tubes.…”

Section: Carbon Nanotube Compositesmentioning

confidence: 99%

Carbon–Carbon Allotropic Hybrids and Composites: Synthesis, Properties, And Applications

Kharissova

Kharissov

González

2019

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Carbon−carbon allotropic hybrids and their composites are reviewed. Carbon−carbon hybrids are mainly composed of graphene, graphite, graphene oxide, reduced graphene oxide, carbon nanotubes, carbyne chains, fullerenes and more complex spherical and ring-ike carbon forms, graphene quantum dots, and carbon nanodots. Aerogels and xerogels on their basis are also discussed. Most of these hybrides consist of 3D architectures with either covalent or van der Waals interactions between carbon atoms, possessing unusual properties as compared to their counterparts, because of the simultaneous presence of carbon structures of distinct dimensionality and reactivity. These composites can be prepared by a variety of methods starting from already existing allotropes, or by their synthesis in situ, such as chemical vapor deposition, solvothermal techniques, pyrolysis, ultrasonication in solution, and other liquidphase methods, frequently including redox steps. Current and potential applications of hybrids and their metal-doped composites as supercapacitors, sensors, catalysts, and environmental remediation reactants are described.

show abstract

Section: Carbon Nanotube Compositesmentioning

confidence: 99%

Carbon–Carbon Allotropic Hybrids and Composites: Synthesis, Properties, And Applications

Kharissova

Kharissov

González

2019

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

“…[ 12–16 ] Being more reactive than graphene, covalent links between the molecules have been devised in chemical synthesis to form a carbon nanobud structure [ 17 ] that has been further manipulated using high‐energy electron irradiation. [ 18 ]…”

Section: Introductionmentioning

confidence: 99%

Hybrid Low‐Dimensional Carbon Allotropes Formed in Gas Phase

Ahmad

Mustonen

McLean

et al. 2020

Adv Funct Materials

View full text Add to dashboard Cite

Graphene, carbon nanotubes (CNTs) and fullerenes are the basic set of low-dimensional carbon allotropes. The latter two arise from the former by selective removal and addition of carbon atoms. Nevertheless, given their morphological disparities, the production of each is typically devised from entirely different starting points. Here, it is demonstrated that all three allotropes can nucleate from (pseudo-)spherical, nanometer-sized transition metal clusters in a gas-suspension when the chemical conditions are favorable. The experimental results indicate that graphitic carbon embryos nucleate on the catalyst particles and sometimes transform into 2D graphene flakes through chain polymerization of carbon fragments forming in the surround gas atmosphere. It is further shown that hydrogenation reactions play an essential role by stabilizing the emerging flakes by mitigating the pentagon and heptagon defects that lead into evolution of fulleroids. Ab initio molecular dynamics simulations show that the ratio of hydrogen to carbon in the reaction is a key growth parameter. Since structural formation takes place in a gas-suspension, graphene accompanied by fullerenes and singlewalled CNTs can be deposited on any surface at ambient temperature with arbitrary layer thicknesses. This provides a direct route for the production and deposition of graphene-based hybrid thin films for various applications.

show abstract

“…17,18 Additionally, the formation mechanism of CNBs is just anticipation, since it has no data to support it, and the precise formation mechanism of CNBs is still under processing. However, as previously reported, 7,19,20 C 60 in CNBs would likely be damaged by the electron beam considering the limited free available carbon atoms provided by CNTs. To repair the damage of anchored C 60 induced by the electron beam, weakly bonded carbon atoms are supposed to move to C 60 over the surface of CNTs, during which the carbon atoms are very likely to be trapped due to large coverage of amorphous carbon structures on the outer surface of CNTs.…”

mentioning

confidence: 65%

“…6 Nicholls et al also synthesized CNBs through a CVD method and indicated that CNBs can be utilized as a precursor in the synthetic process of nanotube junction. 7 In addition to experimental studies, theoretical studies based on density functional theory (DFT) method were also carried out to investigate the properties of CNBs in various aspects, 8 such as its relative reactivity towards amine nucleophile 8d and its Raman features of the CNBs. 8e…”

mentioning

confidence: 99%