Functionalization of surfactant wrapped graphenenanosheets with alkylazides for enhanced dispersibility

Vadukumpully, Sajini; Gupta, Jhinuk; Zhang, Yongping; Xu, Guo Qin; Valiyaveettil, Suresh

doi:10.1039/c0nr00547a

Cited by 118 publications

(41 citation statements)

References 45 publications

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“…Fig. 3b shows many bright regions, which correspond to —C≡N, —NH 2 , and —CH = CH 2 groups, distorting the hexagonally ordered arrangement35. The functionalized regions (indicated by arrows) are shown in Fig.…”

Section: Resultsmentioning

confidence: 98%

Submerged Liquid Plasma for the Synchronized Reduction and Functionalization of Graphene Oxide

Senthilnathan

Liu

Rao

et al. 2014

Sci Rep

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Formation of reduced and functionalized graphene oxide (r-FGO) at ambient temperature and pressure is demonstrated by generating liquid plasma submerged in acetonitrile and graphene oxide solution. The partial restoration of conjugation (sp2 domain) and insertion of fluorophores such as nitrile and amine in r-FGO displays enhanced fluorescence property. Presence of nitrile and amine in r-FGO are confirmed by X-ray photoelectron spectroscopy and Fourier transforms infrared spectroscopy. Morphology and optical property of r-FGO are studied with transmission electron microscopy, scanning tunneling microscopy and Ultraviolet–visible spectroscopy measurements. The nitrile and amine present in r-FGO undergo a surface-controlled reversible redox reaction and sp2- enriched r-FGO acts as an electrical double layer, providing additional hybrid capacitance or pseudocapacitance. r-FGO shows high cyclic stability with a specific capacitance value of 349 F/g at the scan rate of 10 mV/s. Only marginal reduction of specific capacitance (<10% reduction) is observed at the end of 1000 cycles.

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Section: Resultsmentioning

confidence: 98%

Submerged Liquid Plasma for the Synchronized Reduction and Functionalization of Graphene Oxide

Senthilnathan

Liu

Rao

et al. 2014

Sci Rep

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“…Its distinctive electronic structure such as a point like Fermi surface as well as linear dispersion of bands close to the Fermi level enables graphene to demonstrate the quantum Hall effect and ballistic transport. 14,15 Several studies have been devoted to understanding the role of an external chemical agent in modulating the electronic properties of graphene. to name a few.…”

Section: Introductionmentioning

confidence: 99%

Optical response and gas sequestration properties of metal cluster supported graphene nanoflakes

Chakraborty

Chattaraj

2016

Phys. Chem. Chem. Phys.

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The possibility of obtaining metal cluster (M3O(+), M = Li, Na, K) supported pristine, B-doped and BN-doped graphene nanoflakes (GR, BGR and BNGR, respectively) has been investigated by carrying out density functional theory (DFT) based calculations. Thermochemical analysis reveals the good stability of M3O(+)@GR/BGR/BNGR moieties. The dynamic stability of M3O(+)@GR/BGR/BNGR moieties is confirmed through an atom-centered density matrix propagation simulation at 298 K up to 500 fs. Orbital and electrostatic interactions play pivotal roles in stabilizing the metal-cluster supported graphene nanoflakes. The metal clusters lower the Fermi levels of the host nanoflakes and enable them to exhibit reasonably good optical response properties such as polarizability and static first hyperpolarizability. In particular, Na3O(+)/K3O(+)@BGR complexes exhibit very large first hyperpolarizability values at the static field limit. All the M3O(+)@BGR/BNGR moieties demonstrate broadband optical absorption encompassing the ultraviolet, visible as well as infrared domains. The metal-cluster supported graphene nanoflakes, in general, can sequestrate polar molecules, viz. CO, NO and CH3OH, in a thermodynamically more favorable way than GR, BGR and BNGR. In the adsorbed state, the CO, NO and CH3OH molecules, in general, attain an 'active' state as compared to their free counterparts.

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“…Thus, the response properties of graphene nanoflakes in the presence of a guest atom/molecule are being * Corresponding author. Email: pkc@chem.iitkgp.ernet.in studied with great vigour [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34]. Since it is possible to functionalise graphene nanoflakes with different chemical groups, the properties of the said system could be modulated to different extents.…”

Section: Introductionmentioning

confidence: 99%

Interaction of BN- and BP-doped graphene nanoflakes with some representative neutral molecules and anions

Chakraborty

Chattaraj

2015

Molecular Physics

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The interaction of BN-and BP-doped graphene nanoflakes with some representative neutral molecules and anions (H 2 O, HF, SH − , CH 3 O − , BO 2 − , F − ) has been studied through density functional theory (DFT) calculations. The neutral molecules remain physisorbed whereas all the anions but one remains chemisorbed. Thermodynamically, most of the studied systems are found to be stable. Conceptual DFT-based reactivity descriptors were employed in order to provide rationale behind such observation. The nature of interactions in cases of the anions is predominantly of covalent type whereas the same for neutral molecules is of non-covalent type. The electrostatic and orbital interactions play important roles in stabilising the absorbed moieties. The kinetic stability of the absorbed moieties is confirmed through an atom-centred density matrix propagation simulation at 298 K temperature up to 500 fs. All the studied systems show excellent kinetic stability and remain absorbed up to 500 fs exhibiting rich vibrational and rotational dynamical evolutions.

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Functionalization of surfactant wrapped graphenenanosheets with alkylazides for enhanced dispersibility

Cited by 118 publications

References 45 publications

Submerged Liquid Plasma for the Synchronized Reduction and Functionalization of Graphene Oxide

Submerged Liquid Plasma for the Synchronized Reduction and Functionalization of Graphene Oxide

Optical response and gas sequestration properties of metal cluster supported graphene nanoflakes

Interaction of BN- and BP-doped graphene nanoflakes with some representative neutral molecules and anions

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