Urea-assisted low temperature green synthesis of graphene nanosheets for transparent conducting film

Chamoli, Pankaj; Das, Malay Kumar; Kar, Kamal K.

doi:10.1016/j.jpcs.2017.10.001

Cited by 42 publications

(8 citation statements)

References 43 publications

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“…The observed behavior can be explained by the formation of multilayer and domains structure of the graphene layer due to different nucleation densities as reported in our previous article [46]. Recently, Chamoli et al and his co-workers have developed low defect density graphene nanosheets (GNs) have via chemical reduction of exfoliated graphite (EG) in the presence of a green reducing agent for transparent conductive lm [47,48]. They have achieved the transmittance value of ~ 71.5% and sheet resistance of ~ 1KΩ/sq.…”

Section: Properties Of Transferred Graphenementioning

confidence: 52%

Effect of copper pretreatment on optical and electrical properties of camphor-based graphene by chemical vapour deposition

Chaliyawala

Narasimman

Pati

et al. 2021

J Mater Sci: Mater Electron

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Polycrystalline copper (Cu) foil is widely used as catalytic substrate for graphene growth in chemical vapor deposition (CVD) technique. The surface properties of the Cu foil strongly affect the growth behavior and nal quality of CVD-grown graphene. The effect of pretreatment of Cu foil using four different solutions (acetone, acetic acid, HCl and HNO 3 ) on the graphene growth held in atmospheric pressure CVD and its subsequent impact on electrical and optical properties are investigated. Natural camphor is used as the solid carbon precursor. The surface characteristics before and after the growth are studied using scanning electron microscopy and atomic force microscopy. The pretreatment conditions of Cu and the growth of graphene from camphor were correlated using Raman spectroscopy, optical and electrical characteristics. Our ndings suggest that HCl pretreated Cu foil exhibited largedomain, uniform coverage of the transferred graphene with excellent optical (> 93% at 550 nm) and electrical properties (sheet resistance of 861 ± 40 ohm/sq), with promisingly low RMS value of roughness (38 nm). The pretreatment process improved the quality of graphene by removing the surface impurity particles and surface native oxides. A Schottky junction diode of graphene/n-silicon is fabricated by transferring the graphene to SiO 2 /Si substrate under dark and illuminated conditions is also demonstrated to establish its potential in micro-and opto-electronics.

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Section: Properties Of Transferred Graphenementioning

confidence: 52%

Effect of copper pretreatment on optical and electrical properties of camphor-based graphene by chemical vapour deposition

Chaliyawala

Narasimman

Pati

et al. 2021

J Mater Sci: Mater Electron

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“…For the AgNWs/GR (48 mg/m 2 ) film whose initial transmittance was 52.2%, the transmittance of this film was 52% after 30 days of storage and decreased by 0.38%. Therefore, GR not only can keep the conductivity of the composite film stable but also almost have no effect on the transmittance of the film during the storage time due to the GR excellent properties …”

Section: Resultsmentioning

confidence: 99%

Flexible and Transparent Silver Nanowires Integrated with a Graphene Layer-Doping PEDOT:PSS Film for Detection of Hydrogen Sulfide

Liu

Jiang

et al. 2021

ACS Appl. Electron. Mater.

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A flexible and transparent poly(3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS) film was doped with a silver nanowire (AgNW)-integrated graphene (GR) layer to improve the conductivity, which enhanced the sensitivity of the chemiresistive sensor for detection of hydrogen sulfide gas (H 2 S). The sheet resistance and transmittance of AgNWs/GR and AgNWs/GR/PEDOT:PSS films remain stable during more than 25 days in a room environment. The AgNWs/GR and AgNWs/GR/ PEDOT:PSS films show great flexibility that the sheet resistance remains stable after bending 1000 times. The AgNWs and PEDOT:PSS isolated by the GR film can be used repeatedly in H 2 S detection, which shows that the AgNW layer-doping PEDOT:PSS film has great potential ability in H 2 S detection. In addition, the bending test has little effect on the response of the AgNWs/GR/PEDOT:PSS film and the transmittance of AgNWs/GR/ PEDOT:PSS change a little after reaction with H 2 S due to addition of GR. This work presents a platform to inspire AgNW layer-doping PEDOT:PSS materials for highly sensitive chemiresistive sensor.

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“…The ratio I D /I G can provide information about the inter-valley scattering rate of defects and the boundaries of graphene, while the I 2D /I G ratio can reflect the stacking-layer number of graphene. 35,36 The results indicate that the GNS in situ synthesized during 3D vibration milling has a small amount of amorphous graphitic phases along with a multi-layer structure. Meaningfully, the Raman result also implies that GNS can be successfully synthesized in situ, utilizing this method.…”

Section: Morphologies Of As-received 316l Powder and Gns-316l Composimentioning

confidence: 95%

A Facile and Cost-Effective Approach to Fabricate In-Situ Synthesized Graphene Nanosheet Reinforced 316L Stainless Steel

Ren

Zhang

et al. 2020

JOM

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A facile and cost-effective approach was used to fabricate in situ synthesized graphene nanosheet reinforced 316L stainless steel (GNS-316L), which involved in situ synthesis of graphene nanosheets (GNS) in 316L stainless steel (316L) powder by three-dimensional vibration milling of 316L powder with graphite paper as the carbon source, along with consolidation via spark plasma sintering. The microstructure was characterized by scanning electron microscope (SEM) and the mechanical properties were determined by tensile tests. As a result, a microhardness of 408 HV and an ultimate tensile strength of 508 MPa can be attained for the 0.05 wt.% GNS-316L, which are respectively enhanced by 35% and 23% as compared to 316L stainless steel. The merits of this method are its low cost, simple preparation, and absence of harmful chemical reagents used during the preparation process. This work can open up practical applications for preparing GNS reinforced metal matrix materials in large-scale production.

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Urea-assisted low temperature green synthesis of graphene nanosheets for transparent conducting film

Cited by 42 publications

References 43 publications

Effect of copper pretreatment on optical and electrical properties of camphor-based graphene by chemical vapour deposition

Effect of copper pretreatment on optical and electrical properties of camphor-based graphene by chemical vapour deposition

Flexible and Transparent Silver Nanowires Integrated with a Graphene Layer-Doping PEDOT:PSS Film for Detection of Hydrogen Sulfide

A Facile and Cost-Effective Approach to Fabricate In-Situ Synthesized Graphene Nanosheet Reinforced 316L Stainless Steel

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