Effect of carbon nanotubes produced by using different methods on electrical and optical properties of zinc oxide–carbon nanotube composite

Güler, Ömer

doi:10.3139/146.111218

Cited by 7 publications

(1 citation statement)

References 22 publications

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“…In contrast to graphene, superparamagnetic nanoparticles have been extensively studied as antibacterial agents that change the metabolic activity of bacteria, and which can damage macromolecules including proteins, lipids and DNA, leading to bacterial death [20][21][22]. On the other hand, it is important to determine the band gap energy to evaluate the electrical and optical properties of graphene-based nanostructures and carbon nanotubes, and useful research has been done in this area [23][24][25]. For example, Güler et al [26] investigated the electrical and optical properties of a carbon nanotube/graphene nanoplate(CNT/GNP) mixture-reinforced ZnO matrix at various temperatures by electrical conductivity and UV-Vis absorption measurements.…”

Section: Introductionmentioning

confidence: 99%

Cobalt ferrite nanoparticles supported on reduced graphene oxide sheets: optical, magnetic and magneto-antibacterial studies

Meidanchi

2020

Nanotechnology

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The development of antibacterial nanomaterials has emerged as a strategy to control bacterial activity, due to the growth and spread of antibiotic-resistant pathogen microorganisms. Graphene-based nanocarbons, as one of the most attractive materials, given their extraordinary physical and chemical properties, are promising candidate nanomaterials for biomedical applications. In this study, cobalt ferrite nanoparticles (NPs) supported on reduced graphene oxide (rGO) sheets to form metal nanocomposites (MNCs) known as CoFe2O4@rGO MNCs with different rGO contents (0, 10, 25 and 40 wt%) have been synthesized by a one-step process. The structures, morphology, optical, magnetic and antibacterial properties of the CoFe2O4@rGO were investigated by x-ray diffraction patterns, scanning electron microscopy and transmission electron microscopy images, Raman, Fourier transform infrared (FTIR) and UV–Vis spectroscopies, vibration sample magnetometry and antibacterial tests as a function of rGO content. The particle sizes of the CoFe2O4 NPs supported on the different rGO contents were below 10 nm. The band gap energy of the samples decreased from about 3.1 to 1.7 eV with reducing rGO content. The results prove the effective reduction of graphene oxide to rGO and also the support of CoFe2O4 on rGO sheets by a one-step hydrothermal reaction. The increase in rGO content in the samples reduced their saturated magnetization from about 15 to 7 emu g−1. The CoFe2O4@rGO MNCs have shown magneto-antibacterial activity against gram-negative bacteria (Escherichia coli), whose efficacy depends on the value of the rGO content. In contrast, the CoFe2O4@rGO MNC (25 wt% rGO) which was synthesized by the one-step hydrothermal method not only has a narrow band gap energy (for photocatalytic applications), but also significant magneto-antibacterial activity was observed.

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Section: Introductionmentioning

confidence: 99%

Cobalt ferrite nanoparticles supported on reduced graphene oxide sheets: optical, magnetic and magneto-antibacterial studies

Meidanchi

2020

Nanotechnology

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Effect of carbon nanotubes/graphene nanoplates hybrid to ZnO matrix: production, electrical and optical properties of nanocomposite

Güler

Yavuz

Başgöz

et al. 2020

J Mater Sci: Mater Electron

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The effect of graphene nanoplatelets on technical properties of micro- and nano-sized TiO2 matrix: a comparative research study on electrical and optical characteristics

Güler

Ayhan

Başgöz

et al. 2020

J Mater Sci: Mater Electron

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In this study, titanium dioxide (TiO 2 )-based graphene nanoplatelets (GNPs)reinforced composite materials were produced and the electrical and optical properties of the composite materials were investigated. Graphene, which was used as a reinforcing material, was produced by using liquid-phase exfoliation method. While the TiO 2 used as matrix material was commercially available for the first group of samples, it was produced by using the sol-gel method for the second group of the samples. Different rates of graphene were added to the TiO 2 powders which were commercially available and produced by using sol-gel method. GNPs used as a reinforcing material were subjected to TEM analysis. The resulting composite materials were structurally examined in SEM and XRD. Then, the changes in electrical conductivity of these composites under the impact of temperature were measured. UV-Vis spectrometers of the samples were taken and their optical properties were determined. When temperaturebased electrical examination of the produced composite materials was performed, an increase was observed on the electrical conductivity values in both groups of samples as a result of addition of the reinforcing element. In addition, TiO 2 -containing composites produced by using sol-gel method had lower electrical conductivity comparing with commercially purchased TiO 2

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Effect of carbon nanotubes produced by using different methods on electrical and optical properties of zinc oxide–carbon nanotube composite

Cited by 7 publications

References 22 publications

Cobalt ferrite nanoparticles supported on reduced graphene oxide sheets: optical, magnetic and magneto-antibacterial studies

Cobalt ferrite nanoparticles supported on reduced graphene oxide sheets: optical, magnetic and magneto-antibacterial studies

Effect of carbon nanotubes/graphene nanoplates hybrid to ZnO matrix: production, electrical and optical properties of nanocomposite

The effect of graphene nanoplatelets on technical properties of micro- and nano-sized TiO2 matrix: a comparative research study on electrical and optical characteristics

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