Microstructure and electrothermal characterization of transparent reduced graphene oxide thin films manufactured by spin-coating and thermal reduction

Kim, Soo-Yeon; Gang, Ha‐Eun; Park, Gyutae; Jeon, Ha‐Bin; Jeong, Young Gyu

doi:10.1016/j.rinp.2021.104107

Cited by 15 publications

(11 citation statements)

References 47 publications

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“…According to the law of conservation of energy, the amount of heat transfer by radiation and convection, h r+c , as a measure of the electrothermal conversion efficiency, can be expressed as the following equation. [ 47 ]

h_{r + c} = \frac{P_{normalE}}{T_{normals} - T_{normali}} = \frac{I_{normalc} V_{normali}}{T_{normals} - T_{normali}}

where I c is the steady‐state current, V i is the initial applied voltage, T i is the initial sample temperature, and T s is the steady‐state saturated temperature. As a result, h r+c at different applied voltages of MCP1 and MCF1 could be evaluated, as shown in Table 2 .…”

Section: Resultsmentioning

confidence: 99%

“…In general, lower h r+c values indicate higher electrothermal conversion efficiency, requiring relatively low electric power to maintain a saturated steady‐state temperature. [ 47 ] Interestingly, MCF1 was measured to have lower h r+c values than MCP1 at similar applied voltages. This result is related to the fact that the higher porosity of MCP1 contributes to lower the heat loss by thermal radiation and convection, compared with MCF1.…”

Section: Resultsmentioning

confidence: 99%

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Electromagnetic Interference Shielding and Electrothermal Performance of MXene‐Coated Cellulose Hybrid Papers and Fabrics Manufactured by a Facile Scalable Dip‐Dry Coating Process

et al. 2021

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Herein, the electromagnetic interference (EMI) shielding and electrothermal properties of MXene‐coated cellulose hybrid papers (MCPs) and fabrics (MCFs) with high flexibility and low density, which are manufactured by a dip‐dry coating approach, are reported. For this purpose, MCPs and MCFs are fabricated by dipping cellulose papers and fabrics repeatedly into an aqueous dispersion of MXene. The electron microscopic and X‐ray diffraction data reveal that MXene sheets are coated uniformly on the surfaces of cellulose fibrils and fibers and that their contents increase with the dip‐dry coating cycle. For MCP10 (5.68 wt% MXene) and MCF10 (11.77 wt% MXene), which are manufactured by ten‐time dip‐dry coating cycles, high electrical conductivity of 1.91 and 0.08 S cm−1 are attained, respectively. In addition, MCP10 and MCF10 possess excellent absolute EMI shielding effectiveness (SSEt) of 2198 and 1100 dB cm2 g−1 at 8 GHz, respectively, which is due to the multiple internal reflection and absorption of incident EM waves by conductive and interconnected MXene‐coated cellulose fibrils and fibers. It is also found that MCP1 (0.9 wt% MXene) and MCF1 (1.9 wt% MXene) at one‐time dip‐dry coating cycle show outstanding electrothermal performance in aspects of high saturated temperatures and energy conversion efficiency at low applied voltages.

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h_{r + c} = \frac{P_{normalE}}{T_{normals} - T_{normali}} = \frac{I_{normalc} V_{normali}}{T_{normals} - T_{normali}}

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Electromagnetic Interference Shielding and Electrothermal Performance of MXene‐Coated Cellulose Hybrid Papers and Fabrics Manufactured by a Facile Scalable Dip‐Dry Coating Process

et al. 2021

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“…The coating of reduced graphene oxide has been challenging for scientist for applications. According to literature, there were many coating types as dip coating [9], spin coating [10], spray coating [11], anodic exfoliation method [12] etc. On the other, these kind of coating techniques require different equipment and chemical processes.…”

Section: The Coating Methods Of Reduced Graphene Oxidementioning

confidence: 99%

THE COATING OF REDUCED GRAPHENE OXIDE (rGO): A NOVEL ULTRASONIC-ASSISTED METHOD

Gürer¹,

Yılmaz²,

Budak³

et al. 2022

RAP Conference Proceedings

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The graphene is one of the most popular materials of our age since its discovery. The graphene and its derivatives have gained much attention in sensor applications because of its features (e.g., electronic conductivity, specific surface area, etc.). However, the coating of graphene is challenging for the researchers especially for Si/SiO2 surfaces due to its surface tension. Many researchers tend to use chemical materials for the coating rGO onto Si/SiO2 such as APTES, TEOS, PEG, HMDS etc. For the purpose, we discovered a novel type ultrasonic-assisted coating method for sensor applications which can be done using any chemicals. To do so, we firstly produced reduced graphene oxide (rGO) from graphite by using Hummer's method and chemical reduction process. Then, we prepared Si/SiO2 samples and put them into plastic container. After that, we put samples into ultrasonic bath and dropped rGO suspension onto samples by using with micro-pipette. After that, the rGO coated samples were dried on hot plate at 100°C. The results showed high potential that rGO can be coated onto Si/SiO2 surfaces with low-cost solution.

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“…The spin coating method is also a common method for preparing graphene-based film [39][40][41][42][43][44][45]. In a typical process, dropping a certain solution on the substrate, continuous thin film is formed under the action of centrifugal force.…”

Section: Spin Coatingmentioning

confidence: 99%

Graphene-Based Films: Fabrication, Interfacial Modification, and Applications

et al. 2021

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Graphene-based film attracts tremendous interest in many potential applications due to its excellent thermal, electrical, and mechanical properties. This review focused on a critical analysis of fabrication, processing methodology, the interfacial modification approach, and the applications of this novel and new class material. Strong attention was paid to the preparation strategy and interfacial modification approach to improve its mechanical and thermal properties. The overview also discussed the challenges and opportunities regarding its industrial production and the current status of the commercialization. This review showed that blade coating technology is an effective method for industrial mass-produced graphene film with controllable thickness. The synergistic effect of different interface interactions can effectively improve the mechanical properties of graphene-based film. At present, the application of graphene-based film on mobile phones has become an interesting example of the use of graphene. Looking for more application cases is of great significance for the development of graphene-based technology.

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Microstructure and electrothermal characterization of transparent reduced graphene oxide thin films manufactured by spin-coating and thermal reduction

Cited by 15 publications

References 47 publications

Electromagnetic Interference Shielding and Electrothermal Performance of MXene‐Coated Cellulose Hybrid Papers and Fabrics Manufactured by a Facile Scalable Dip‐Dry Coating Process

Electromagnetic Interference Shielding and Electrothermal Performance of MXene‐Coated Cellulose Hybrid Papers and Fabrics Manufactured by a Facile Scalable Dip‐Dry Coating Process

THE COATING OF REDUCED GRAPHENE OXIDE (rGO): A NOVEL ULTRASONIC-ASSISTED METHOD

Graphene-Based Films: Fabrication, Interfacial Modification, and Applications

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