Near-Field Radiative Thermal Modulation by Tunneling Through Graphene Sheet

Hu, Yizhi; Xianglin, Tang; Yang, Yue; Zhu, Yonggang

doi:10.30919/esee8c496

Cited by 5 publications

(4 citation statements)

References 43 publications

(50 reference statements)

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“…Graphene due to its large surface area, mechanical flexibility, thermal, and electric properties has been investigated in different areas such as lithium-ion batteries, gas separation, composites, electronics (Fu et al, 2019) (Nidamanuri et al, 2020) (Hu et al, 2020) (Y. Chen et al, 2019) (Y. Zhang, Yan, et al, 2019) (Liu et al, 2018).…”

Section: Research Articlementioning

confidence: 99%

Fabrication and characterization of a water purification system using activated carbon and graphene nanoplatelets: Toward the development of a nanofiltration matrix

Zhao

Yang

Singh

et al. 2021

Water Environment Research

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Researchers are trying to tackle water scarcity in numerous ways. One of those ways is the use of nanotechnology in water processing and purification. The current work involves the fabrication and optimization of activated carbon and graphene-based hybrid water purification system. Five different concentrations of methylene blue and deionized water (DI) dye solutions were used, and they were filtered in three different cycles. For the potential usage on the consumer side, a small-scale, low-cost water filter is developed using activated carbon, commercial filter paper, and graphene nanoplatelets. The filter paper is used to hold mixtures of the activated carbon and graphene nanoplatelets within the water filter. The conductivity, TDS, and pH are measured for the feed water and the processed water using an Oakton EcoTestr and Apera Instruments PH60 Premium Pocket pH meter, respectively. A UV-Vis spectrometer is used to measure the absorption of solutions. The distribution and adsorption of the dye particles were observed by scanning electron microscopy. © 2021 Water Environment Federation • Practitioner points• These results show the effectiveness of the system in the removal of dye particles above a given particle size. • The concentration of the dye solution decreased after every cycle.• The GnPs filtration system more effectively dye particles as compared to the filtration system containing only Activated carbon. • UV-Vis spectroscopy results showed that the methylene blue dye particles decreased after every cycle. • This research can open a broad area of projects toward waste/wastewater practice for particles above a certain particle size.

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Section: Research Articlementioning

confidence: 99%

Fabrication and characterization of a water purification system using activated carbon and graphene nanoplatelets: Toward the development of a nanofiltration matrix

Zhao

Yang

Singh

et al. 2021

Water Environment Research

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“…Graphene is a great candidate for NFRHT applications as it supports SPPs in the infrared region, and the spectral location of the SPP modes can significantly be tuned by changing the chemical potential of graphene via applying a bias voltage. So far, graphene has been proposed for heat transfer enhancement , active control and switching of radiative heat transfer [18,21,27,29,31,[35][36][37][38][39][40][41][42], thermophotovoltaic power generation [37,43,44], heat transfer suppression [8,17,33], ultrafast modulation of heat transfer [45], and active control of the direction of heat flow [46].…”

Section: Introductionmentioning

confidence: 99%

“…Most of the theoretical studies on graphene's NFRHT are based on using the local Kubo [5][6][7][8][9][10][11][12][13][14][15][16][17][18]20,22,[24][25][26][27][28][29][32][33][34][35][36][37][38][40][41][42][43][44][45] and Drude [19,23,30] models for the electrical conductivity of graphene. These two local models are obtained by making several simplifying assumptions as will be discussed in Section III.…”

Section: Introductionmentioning

confidence: 99%

Effect of nonlocal electrical conductivity on near-field radiative heat transfer between graphene sheets

2022

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Graphene's near-field radiative heat transfer is determined from its electrical conductivity, which is commonly modeled using the local (wavevector independent) Kubo and Drude formulas. In this letter, we analyze the non-locality of the graphene electrical conductivity using the Lindhard model combined with the Mermin relaxation time approximation. We also study how the variation of the electrical conductivity with the wavevector affects near-field radiative conductance between two graphene sheets separated by a vacuum gap. It is shown that the variation of the electrical conductivity with the wavevector, 𝑘 𝜌 , is appreciable for 𝑘 𝜌 s greater than 100𝑘 0 , where 𝑘 0 is the magnitude of the wavevector in the free space. The Kubo model is obtained by assuming 𝑘 𝜌 → 0, and thus is not valid for 𝑘 𝜌 > 100𝑘 0 . The Kubo electrical conductivity provides an accurate estimation of the spectral radiative conductance between two graphene sheets except for around the surface-plasmon-polariton frequency of graphene and at separation gaps smaller than 20 nm where there is a non-negligible contribution from electromagnetic modes with 𝑘 𝜌 > 100𝑘 0 to the radiative conductance. The Drude formula proves to be inaccurate for modeling the electrical conductivity and radiative conductance of graphene except for at temperatures much below the Fermi temperature and frequencies much smaller than 2𝜇 𝑐 ℏ , where 𝜇 𝑐 and ℏ are the chemical potential and reduced Planck's constant, respectively. It is also shown that the electronic scattering

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“…Throughout the past 100 years, the electronics industry has been developed rapidly [ 1 – 4 ]. Research in the field of electronics is becoming more and more thorough [ 5 – 13 ]. There has been a rapid rise in the literature about electronics and the publications on electronics from Scopus as shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

Recent progress for silver nanowires conducting film for flexible electronics

et al. 2021

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Graphic abstract Silver nanowires (AgNWs), as one-dimensional nanometallic materials, have attracted wide attention due to the excellent electrical conductivity, transparency and flexibility, especially in flexible and stretchable electronics. However, the microscopic discontinuities require AgNWs be attached to some carrier for practical applications. Relative to the preparation method, how to integrate AgNWs into the flexible matrix is particularly important. In recent years, plenty of papers have been published on the preparation of conductors based on AgNWs, including printing techniques, coating techniques, vacuum filtration techniques, template-assisted assembly techniques, electrospinning techniques and gelating techniques. The aim of this review is to discuss different assembly method of AgNW-based conducting film and their advantages. Conducting films based on silver nanowires (AgNWs) have been reviewed with a focus on their assembly and their advantages.

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Near-Field Radiative Thermal Modulation by Tunneling Through Graphene Sheet

Cited by 5 publications

References 43 publications

Fabrication and characterization of a water purification system using activated carbon and graphene nanoplatelets: Toward the development of a nanofiltration matrix

Fabrication and characterization of a water purification system using activated carbon and graphene nanoplatelets: Toward the development of a nanofiltration matrix

Effect of nonlocal electrical conductivity on near-field radiative heat transfer between graphene sheets

Recent progress for silver nanowires conducting film for flexible electronics

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