Hybrid nanomaterial of α-Co(OH)2 nanosheets and few-layer graphene as an enhanced electrode material for supercapacitors

Composites such as MgO/few-layered graphene can be used as electrode materials in supercapacitors with aqueous electrolytes but not non-aqueous electrolytes.

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Synthesis of a nitrogen rich (2D–1D) hybrid carbon nanomaterial using a MnO2 nanorod template for high performance Li-ion battery applications

Journal of Materials Chemistry A ◽

10.1039/c4ta05642f ◽

2015 ◽

Vol 3 (13) ◽

pp. 6810-6818 ◽

Cited By ~ 21

Author(s):

B. P. Vinayan ◽

Nele I. Schwarzburger ◽

Maximilian Fichtner

Keyword(s):

High Performance ◽

Li Ion Battery ◽

Carbon Nanomaterial ◽

Hybrid Nanomaterial ◽

Layer Graphene ◽

Novel Approach ◽

Li Ion ◽

Few Layer Graphene ◽

Hybrid Carbon ◽

Battery Anode

A novel approach to synthesize a nitrogen rich few layer graphene–carbon nanotube hybrid nanomaterial for high performance Li ion battery anode electrodes.

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A few-layer graphene/chlorin e6 hybrid nanomaterial and its application in photodynamic therapy against Candida albicans

Beilstein Journal of Nanotechnology ◽

10.3762/bjnano.11.90 ◽

2020 ◽

Vol 11 ◽

pp. 1054-1061

Author(s):

Selene Acosta ◽

Carlos Moreno-Aguilar ◽

Dania Hernández-Sánchez ◽

Beatriz Morales-Cruzado ◽

Erick Sarmiento-Gomez ◽

...

Keyword(s):

Candida Albicans ◽

Fungal Infections ◽

Chlorin E6 ◽

Ros Generation ◽

Photodynamic Treatment ◽

Hybrid Nanomaterial ◽

Layer Graphene ◽

Wide Range ◽

Red Led ◽

Few Layer Graphene

The global emergence of multidrug resistance of fungal infections and the decline in the discovery of new antibiotics are increasingly prevalent causes of hospital-acquired infections, among other major challenges in the global health care sector. There is an urgent need to develop noninvasive, nontoxic, and new antinosocomial approaches that work more effectively and faster than current antibiotics. In this work, we report on a biocompatible hybrid nanomaterial composed of few-layer graphene and chlorin e6 (FLG-Ce6) for the photodynamic treatment (PDT) of Candida albicans. We show that the FLG-Ce6 hybrid nanomaterial displays enhanced reactive oxygen species (ROS) generation compared with Ce6. The enhancement is up to 5-fold when irradiated for 15 min at 632 nm with a red light-emitting diode (LED). The viability of C. albicans in the presence of FLG-Ce6 was measured 48 h after photoactivation. An antifungal effect was observed only when the culture/FLG-Ce6 hybrid was exposed to the light source. C. albicans is rendered completely unviable after exposure to ROS generated by the excited FLG-Ce6 hybrid nanomaterial. An increased PDT effect was observed with the FLG-Ce6 hybrid nanomaterial by a significant reduction in the viability of C. albicans, by up to 95%. This is a marked improvement compared to Ce6 without FLG, which reduces the viability of C. albicans to only 10%. The antifungal action of the hybrid nanomaterial can be activated by a synergistic mechanism of energy transfer of the absorbed light from Ce6 to FLG. The novel FLG-Ce6 hybrid nanomaterial in combination with the red LED light irradiation can be used in the development of a wide range of antinosocomial devices and coatings.

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Modern methods of obtaining few-layer graphene structures by the method of electrochemical exfoliation of graphite

Perspektivnye Materialy ◽

10.30791/1028-978x-2018-7-5-15 ◽

2018 ◽

pp. 5-15

Author(s):

E. S. Bakunin ◽

◽

E. Yu. Obraztsova ◽

A. V. Rukhov ◽

◽

...

Keyword(s):

Electrochemical Exfoliation ◽

Layer Graphene ◽

Modern Methods ◽

Few Layer Graphene ◽

Graphene Structures

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Omnidirectional terahertz photonic band gap broaden effect in one-dimensional photonic crystal containing few-layer graphene

Optics Communications ◽

10.1016/j.optcom.2021.126898 ◽

2021 ◽

Vol 490 ◽

pp. 126898

Author(s):

Feng Wu ◽

Mingyuan Chen ◽

Zhanxu Chen ◽

Chengping Yin

Keyword(s):

Photonic Crystal ◽

Band Gap ◽

Photonic Band Gap ◽

One Dimensional ◽

Dimensional Photonic Crystal ◽

Layer Graphene ◽

Few Layer Graphene ◽

Photonic Band

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Properties of Silicone Rubber-Based Composites Reinforced with Few-Layer Graphene and Iron Oxide or Titanium Dioxide

Polymers ◽

10.3390/polym13101550 ◽

2021 ◽

Vol 13 (10) ◽

pp. 1550

Author(s):

Vineet Kumar ◽

Anuj Kumar ◽

Minseok Song ◽

Dong-Joo Lee ◽

Sung-Soo Han ◽

...

Keyword(s):

Magnetic Properties ◽

Titanium Dioxide ◽

Iron Oxide ◽

Stress Relaxation ◽

Silicone Rubber ◽

Room Temperature ◽

Relaxation Rates ◽

Layer Graphene ◽

Few Layer Graphene ◽

Mechanical Actuation

The increasing demand for polymer composites with novel or improved properties requires novel fillers. To meet the challenges posed, nanofillers such as graphene, carbon nanotubes, and titanium dioxide (TiO2) have been used. In the present work, few-layer graphene (FLG) and iron oxide (Fe3O4) or TiO2 were used as fillers in a room-temperature-vulcanized (RTV) silicone rubber (SR) matrix. Composites were prepared by mixing RTV-SR with nanofillers and then kept for vulcanization at room temperature for 24 h. The RTV-SR composites obtained were characterized with respect to their mechanical, actuation, and magnetic properties. Fourier-transform infrared spectroscopy (FTIR) analysis was performed to investigate the composite raw materials and finished composites, and X-ray photoelectron spectroscopy (XPS) analysis was used to study composite surface elemental compositions. Results showed that mechanical properties were improved by adding fillers, and actuation displacements were dependent on the type of nanofiller used and the applied voltage. Magnetic stress-relaxation also increased with filler amount and stress-relaxation rates decreased when a magnetic field was applied parallel to the deformation axes. Thus, this study showed that the inclusion of iron oxide (Fe3O4) or TiO2 fillers in RTV-SR improves mechanical, actuation, and magnetic properties.

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Temperature Dependence of G and D’ Phonons in Monolayer to Few-Layer Graphene with Vacancies

Nanoscale Research Letters ◽

10.1186/s11671-020-03414-w ◽

2020 ◽

Vol 15 (1) ◽

Author(s):

Mingming Yang ◽

Longlong Wang ◽

Xiaofen Qiao ◽

Yi Liu ◽

Yufan Liu ◽

...

Keyword(s):

Negative Temperature Coefficient ◽

Negative Temperature ◽

Intrinsic Properties ◽

Temperature Dependent ◽

Phonon Interaction ◽

Electron Phonon Interaction ◽

Layer Graphene ◽

A Value ◽

Few Layer Graphene

Abstract The defects into the hexagonal network of a sp2-hybridized carbon atom have been demonstrated to have a significant influence on intrinsic properties of graphene systems. In this paper, we presented a study of temperature-dependent Raman spectra of G peak and D’ band at low temperatures from 78 to 318 K in defective monolayer to few-layer graphene induced by ion C+ bombardment under the determination of vacancy uniformity. Defects lead to the increase of the negative temperature coefficient of G peak, with a value almost identical to that of D’ band. However, the variation of frequency and linewidth of G peak with layer number is contrary to D’ band. It derives from the related electron-phonon interaction in G and D’ phonon in the disorder-induced Raman scattering process. Our results are helpful to understand the mechanism of temperature-dependent phonons in graphene-based materials and provide valuable information on thermal properties of defects for the application of graphene-based devices.

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