Correlation between morphological, structural and electrical properties of graphite and exfoliated graphene nanostructures

Rezaei, Asma; Kamali, Bita; Kamali, Ali Reza

doi:10.1016/j.measurement.2019.107087

Cited by 55 publications

(18 citation statements)

References 47 publications

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“…As an interesting member of carbon nanostructures, graphene, the building block of graphite, can be defined as an atomically two-dimensional layer of hexagonally bonded carbon atoms. Such carbon structure can exhibit outstanding properties such as large specific surface area, high mechanical strength, high electron conductivity as well as strong thermal, optical and catalytic characteristics [149] , [150] , [151] , [152] , [153] , [154] , [155] , [156] , [157] , [158] , [159] , [160] . Graphene-based materials are referred to those materials that contain single or few-layer graphene or graphene oxide [161] , [162] in their structures.…”

Section: Graphene-based Materialsmentioning

confidence: 99%

Antiviral performance of graphene-based materials with emphasis on COVID-19: A review

Seifi

Kamali

2021

Medicine in Drug Discovery

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Coronavirus disease-2019 has been one of the most challenging global epidemics of modern times with a large number of casualties combined with economic hardships across the world. Considering that there is still no definitive cure for the recent viral crisis, this article provides a review of nanomaterials with antiviral activity, with an emphasis on graphene and its derivatives, including graphene oxide, reduced graphene oxide and graphene quantum dots. The possible interactions between surfaces of such nanostructured materials with coronaviruses are discussed. The antiviral mechanisms of graphene materials can be related to events such as the inactivation of virus and/or the host cell receptor, electrostatic trapping and physico-chemical destruction of viral species. These effects can be enhanced by functionalization and/or decoration of carbons with species that enhances graphene-virus interactions. The low-cost and large-scale preparation of graphene materials with enhanced antiviral performances is an interesting research-direction to be explored.

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Section: Graphene-based Materialsmentioning

confidence: 99%

Antiviral performance of graphene-based materials with emphasis on COVID-19: A review

Seifi

Kamali

2021

Medicine in Drug Discovery

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“…Hence, it can be inferred that the molten salt method has an enhancing effect on the conductivity. The increase in the conductivity is due to the advantages of the molten salt method, which enables the production of graphene with high crystallinity and purity [44]. The highest conductivity value was achieved with GGr600 at 600°C.…”

Section: Resultsmentioning

confidence: 99%

Green Synthesis of Graphene from Graphite in Molten Salt Medium

Gürünlü

Yücedağ

2020

Journal of Nanomaterials

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Green synthesis of graphene from graphite was carried out in molten salt mixture of LiCl-KCl, which is an environmentally friendly alternative to traditional methods using a large number of chemicals. The effect of carbonization temperature on the final properties of graphene products was investigated at a temperature range of 500-800°C. The layer numbers of graphene products were determined as a single layer and few layers by XRD and Raman analyses. The highest conductivity value of 1219 S/m was reached with the sample synthesized at 600°C (GGr600), which is 10-fold higher than that of commercial graphene (CG) (115 S/m). The percentage of carbon contents of GGr600 and sample synthesized at 800°C (GGr800) was determined as 86% and 73% by XPS. From the SEM analyses, it was observed that graphene products have sheet-like structures. A TEM image showed that GGr800 has the thickness changing from 5-9 nm, pointing out the graphene with few layers. AFM analysis demonstrated that GGr600 has a single-layer sheet-like structure.

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“…The cathodic polarisation of graphite immersed in molten LiCl at 800 C under a humid atmosphere can lead to the formation of hydrogen on the surface of the graphite, and the hydrogen produced has the capability to exfoliate the graphite material into high quality graphene nanosheets possessing an attractive combination of properties including high electronic conductivity, as high as 5.8 Â 10 5 S m À1 . [71][72][73][74][75] The process is briey illustrated in Fig. 2.…”

Section: Hydrogen Exfoliation Of Graphite In Molten Saltsmentioning

confidence: 99%