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Castillo-López SG, Cortés-López S, Castillo-López DN. Control of the near-field radiative heat transfer between graphene-coated nanoparticle metasurfaces. Sci Rep 2024; 14:18316. [PMID: 39112718 PMCID: PMC11306795 DOI: 10.1038/s41598-024-69023-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2024] [Accepted: 07/30/2024] [Indexed: 08/10/2024] Open
Abstract
The control of near-field radiative heat transfer (NFRHT) between two metasurfaces can be achieved by manipulating the geometric and dielectric parameters of their components. Based on a 2D effective medium approximation, we describe the dielectric response of each metasurface composed of graphene-coated nanoparticles (GCNPs) on a 2D square lattice as a homogeneous uniaxial film. Wrapping Drude-like nanoparticles (NPs) with graphene enhances the effective plasmonic response of metasurfaces by significantly broadening the frequency range in which surface and hyperbolic waves can be excited by thermal photons. Consequently, the NFRHT between GCNP metasurfaces improves that observed between uncoated Drude-like nanoparticle arrays. We found that the heat flux (Q) grows with increasing metasurface packing fraction (PF) and is also sensitive to GCNP size. By tuning the graphene chemical potential ( μ ) , Q reaches a maximum improvement of 88 % for μ ≈ 0.1 eV with cores made of Drude-like material, while using cores made of the polar dielectric SiC, Q increases up to 226 % for μ ≈ 0.45 eV. Our results show that, in addition to the geometric control achieved with uncoated NP arrays, the tunable optical properties of the graphene shell allow dynamic control of the heat flux, expanding the possibilities for NFRHT engineering offered by GCNP metasurfaces.
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Affiliation(s)
- S G Castillo-López
- Instituto de Física, Universidad Nacional Autónoma de México, Apartado Postal 20-364, 01000, Mexico, Mexico.
| | - S Cortés-López
- Tecnológico Nacional de México/ ITS de Poza Rica, Luis Donaldo Colosio Murrieta S/N, Arroyo del Maíz, 93230, Poza Rica, Mexico
| | - D N Castillo-López
- Facultad de Ciencias de la Electrónica, Benemérita Universidad Autónoma de Puebla, Apartado Postal J-48, 72570, Puebla, Mexico
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Mohammed SA, Kamil Albadri RA, Al-Badri KSL. Simulation of the microwave five-band a perfect metamaterial absorber for the 5G communication. Heliyon 2023; 9:e19466. [PMID: 37681182 PMCID: PMC10481299 DOI: 10.1016/j.heliyon.2023.e19466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 08/16/2023] [Accepted: 08/23/2023] [Indexed: 09/09/2023] Open
Abstract
This study proposes a five-band perfect metamaterials absorber (MMA) for 5G communication in the K- and Ka-bands of the microwave range. The MMA design is based on a folded arms resonator (FAR) with a novel shape, forming the fundamental unit of the absorber. This absorber demonstrates a reasonably wide range of absorption capabilities for 5G communication in the K and Ka bands of the microwave region. The absorptivity of the MMA was examined for both normal and oblique incidence of waves in the frequency range of 20-26 GHz. According to a theoretical analysis, five absorption peaks at resonance frequencies of 20.38, 21.75, 23.1, 24.22 and 25.12 GHz exhibit absorption rates of 97.8%, 92.9%, 97.2%, 99.3% and 96.8%, respectively. The overall average absorption rate is 95.53%, taking into account the presence of two perfect absorption peaks. By adjusting the structural parameters, it is possible to influence the absorption peaks and resonant wavelengths. Additionally, the absorber demonstrates a high level of symmetry, resulting in insensitivity to TE mode polarisation angle and incident angle. The fractal resonators exhibited a capacitive effect at lower frequencies, while the SRRs demonstrated a capacitive effect at higher frequencies. This MMA design is expected to have practical applications in 5G communication technology.
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Aizawa T, Nakata H, Nasu T. Fabrication and Characterization of Acicular Micro-Textured Copper Sheet Device for Low-Temperature Heat Radiation. MICROMACHINES 2023; 14:507. [PMID: 36984914 PMCID: PMC10052894 DOI: 10.3390/mi14030507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 01/30/2023] [Accepted: 01/30/2023] [Indexed: 06/18/2023]
Abstract
An acicular microtextured sheet was developed as a heat radiation device from the high-temperature source to the cooling medium in the infrared (IR) spectrum. The copper surface was modified by acicular micro-texturing to place a semi-regular micro-/nano-cone structure onto it. FT-IR (Fourier transformation IR) spectroscopy was utilized to measure the transmittance diagram in near-IR to far-IR wavelengths. The wavelength (λ) of 6.7 μm, where the highest absorbance valley was detected in the diagram, was equivalent to the doubled size of the micro-cone average height, with Have = 3.3 μm; λ ~ 2 × Have. The electromagnetic waves in the far-IR wavelength were emitted by acicular micro-textured metallic sheets. The heat radiation transfer experiment was performed to describe this low-temperature heat radiation behavior. No temperature rise was detected on the black-colored polycarbonate (BC-PC) plate away from the bare copper sheet without textures, located on the high-temperature source. The temperature increased by 4 K on the BC-PC plate using the acicular textured copper sheet device. The emitter temperature also decreased significantly by 50 K or 50% of the heat source temperature.
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Affiliation(s)
- Tatsuhiko Aizawa
- Surface Engineering Design Laboratory, Shibaura Institute of Technology, Tokyo 144-0045, Japan
| | | | - Takeshi Nasu
- Ebina Denka Kogyo, Co., Ltd., Tokyo 144-0033, Japan
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Refractory All-Ceramic Thermal Emitter for High-Temperature Near-Field Thermophotovoltaics. ENERGIES 2022. [DOI: 10.3390/en15051830] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Thermophotovoltaics is a promising technology for heat recovery and has garnered tremendous attention in the last decades. This work theoretically evaluates the performance of a thermophotovoltaic system equipped with refractory all-ceramic selective thermal emitters made of boron carbide, silicon carbide and beryllium oxide for a high working temperature of 2000 ∘C, which corresponds to the external quantum efficiency of a SiC/Si tandem cell. The influence of thickness and filling ratio on the emissivity of thermal emitters over the wavelength ranging from 0.2 μm to 2.5 μm is studied. The corresponding spectral heat flux and output power are analyzed as well. For a specific configuration, the parameters for the thermophotovoltaic system are obtained, including short circuit current, open circuit voltage, fill factor, total heat flux, output power and conversion efficiency. The proposed all-ceramic thermal emitter ensures the robustness in the high-temperature working condition due to its thermal stability. The tuning of emissivity is achieved and analyzed based on distinct emitter nanostructures, and the further influence on the thermophotovoltaic system performance is deeply explored. This work sheds light on research of high-temperature thermal management and power generation.
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A Review on Thermophotovoltaic Cell and Its Applications in Energy Conversion: Issues and Recommendations. MATERIALS 2021; 14:ma14174944. [PMID: 34501032 PMCID: PMC8434541 DOI: 10.3390/ma14174944] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 08/12/2021] [Accepted: 08/15/2021] [Indexed: 11/17/2022]
Abstract
Generally, waste heat is redundantly released into the surrounding by anthropogenic activities without strategized planning. Consequently, urban heat islands and global warming chronically increases over time. Thermophotovoltaic (TPV) systems can be potentially deployed to harvest waste heat and recuperate energy to tackle this global issue with supplementary generation of electrical energy. This paper presents a critical review on two dominant types of semiconductor materials, namely gallium antimonide (GaSb) and indium gallium arsenide (InGaAs), as the potential candidates for TPV cells. The advantages and drawbacks of non-epitaxy and epitaxy growth methods are well-discussed based on different semiconductor materials. In addition, this paper critically examines and summarizes the electrical cell performance of TPV cells made of GaSb, InGaAs and other narrow bandgap semiconductor materials. The cell conversion efficiency improvement in terms of structural design and architectural optimization are also comprehensively analyzed and discussed. Lastly, the practical applications, current issues and challenges of TPV cells are critically reviewed and concluded with recommendations for future research. The highlighted insights of this review will contribute to the increase in effort towards development of future TPV systems with improved cell conversion efficiency.
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Pirouzfam N, Sendur K. Tungsten Based Spectrally Selective Absorbers with Anisotropic Rough Surface Texture. NANOMATERIALS 2021; 11:nano11082018. [PMID: 34443849 PMCID: PMC8399278 DOI: 10.3390/nano11082018] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Revised: 07/27/2021] [Accepted: 08/04/2021] [Indexed: 11/16/2022]
Abstract
Spectrally selective absorbers have received considerable interest due to their applications in thermophotovoltaic devices and as solar absorbers. Due to extreme operating conditions in these applications, such as high temperatures, thermo-mechanically stable and broadband spectrally selective absorbers are of interest. This paper demonstrates anisotropic random rough surfaces that provide broadband spectrally selective absorption for the thermo-mechanically stable Tungsten surfaces. Anisotropic random rough surface has different correlation lengths in the x- and y-directions, which means their topography parameters have directional dependence. In particular, we demonstrate that spectral absorptance of Tungsten random rough surfaces at visible (VIS) and near-infrared (NIR) spectral regions are sensitive to correlation length and RMS height variations. Our results indicate that by optimizing random rough surface parameters, absorption values exceeding 95% can be obtained. Moreover, our results indicate that anisotropic random rough surfaces broaden the bandwidth of the high absorption region. It is shown that in VIS and NIR regions, the absorption enhancements of up to 47% and 52% are achieved for the isotropic and anisotropic rough surfaces, respectively.
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Chang JY, Taylor S, McBurney R, Ying X, Allu G, Chen YB, Wang L. Enhancing solar-thermal energy conversion with silicon-cored tungsten nanowire selective metamaterial absorbers. iScience 2020; 24:101899. [PMID: 33364587 PMCID: PMC7753143 DOI: 10.1016/j.isci.2020.101899] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2020] [Revised: 11/05/2020] [Accepted: 12/02/2020] [Indexed: 11/30/2022] Open
Abstract
This work experimentally studies a silicon-cored tungsten nanowire selective metamaterial absorber to enhance solar-thermal energy harvesting. After conformally coating a thin tungsten layer about 40 nm thick, the metamaterial absorber exhibits almost the same total solar absorptance of 0.85 as the bare silicon nanowire stamp but with greatly reduced total emittance down to 0.18 for suppressing the infrared emission heat loss. The silicon-cored tungsten nanowire absorber achieves an experimental solar-thermal efficiency of 41% at 203°C during the laboratory-scale test with a stagnation temperature of 273°C under 6.3 suns. Without parasitic radiative losses from side and bottom surfaces, it is projected to reach 74% efficiency at the same temperature of 203°C with a stagnation temperature of 430°C for practical application, greatly outperforming the silicon nanowire and black absorbers. The results would facilitate the development of metamaterial selective absorbers at low cost for highly efficient solar-thermal energy systems. Si-cored tungsten nanowires are fabricated by conformal coating of 40-nm tungsten Total solar absorptance of 0.85 with greatly reduced total emittance is achieved Solar-thermal efficiency of 41% at 203°C under 6.3 suns is measured 74% efficiency at 203°C with a stagnation temperature of 430°C is projected
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Affiliation(s)
- Jui-Yung Chang
- School for Engineering of Matter, Transport & Energy, Arizona State University, Tempe, AZ 85287, USA.,Department of Mechanical Engineering, National Chiao Tung University, Hsinchu 300, Taiwan.,Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu 300, Taiwan
| | - Sydney Taylor
- School for Engineering of Matter, Transport & Energy, Arizona State University, Tempe, AZ 85287, USA
| | - Ryan McBurney
- School for Engineering of Matter, Transport & Energy, Arizona State University, Tempe, AZ 85287, USA
| | - Xiaoyan Ying
- School for Engineering of Matter, Transport & Energy, Arizona State University, Tempe, AZ 85287, USA
| | - Ganesh Allu
- Department of Mechanical Engineering, National Chiao Tung University, Hsinchu 300, Taiwan
| | - Yu-Bin Chen
- Department of Power Mechanical Engineering, National Tsing Hua University, Hsinchu 300, Taiwan.,Department of Mechanical Engineering, National Cheng Kung University, Tainan 70101, Taiwan
| | - Liping Wang
- School for Engineering of Matter, Transport & Energy, Arizona State University, Tempe, AZ 85287, USA
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Tian Y, Ghanekar A, Liu X, Sheng J, Zheng Y. Tunable wavelength selectivity of photonic metamaterials-based thermal devices. JOURNAL OF PHOTONICS FOR ENERGY 2019; 9:032708. [PMID: 34084268 PMCID: PMC8171298 DOI: 10.1117/1.jpe.9.032708] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Wavelength-selective thermal devices have great applications in concentrating solar power systems, high-temperature thermoelectric systems, and solar thermophotovoltaics (STPVs). Lack of high-temperature stability and spectrally selective emissivity in different wavelength regions limits their efficiency. We propose a one-dimensional HfO2/Al2O3-W nanocomposites/W/Al2O3/W multilayered photonic structure as potential wavelength selective thermal devices, and theoretically investigate the emission properties of the proposed Mie-resonance metamaterials from visible (VIS) to midinfrared (MIR) region. HfO2 thin layer is introduced to serve as an antireflection coating film and W layer acts as an IR reflection layer that enhances the absorptivity/emissivity in VIS and near-infrared (NIR) region while reducing the MIR emission simultaneously. Effects of geometric parameters are discussed, such as different radii and volume fractions of W nanoparticles, the thickness of Al2O3-W nanocomposites, and HfO2 thin film. The proposed thermal absorber and emitter exhibit nearly unity absorptance in both VIS and NIR regions, while the emittance approaches zero in the MIR region. The selective absorption/emission window is tunable by varying geometric parameters. The proposed solar thermal devices have great potentials in engineering applications such as STPVs and solar thermoelectric generator due to flexibility of geometric parameters and ease of fabrication.
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Affiliation(s)
- Yanpei Tian
- University of Rhode Island, Department of Mechanical, Industrial and Systems Engineering, Kingston, Rhode Island, United States
| | - Alok Ghanekar
- University of Rhode Island, Department of Mechanical, Industrial and Systems Engineering, Kingston, Rhode Island, United States
| | - Xiaojie Liu
- University of Rhode Island, Department of Mechanical, Industrial and Systems Engineering, Kingston, Rhode Island, United States
| | - Jie Sheng
- The First Hospital of China Medical University, Shenyang, China
| | - Yi Zheng
- University of Rhode Island, Department of Mechanical, Industrial and Systems Engineering, Kingston, Rhode Island, United States
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Tian Y, Ghanekar A, Qian L, Ricci M, Liu X, Xiao G, Gregory O, Zheng Y. Near-infrared optics of nanoparticles embedded silica thin films. OPTICS EXPRESS 2019; 27:A148-A157. [PMID: 30876056 PMCID: PMC6410923 DOI: 10.1364/oe.27.00a148] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Revised: 01/02/2019] [Accepted: 01/22/2019] [Indexed: 06/09/2023]
Abstract
This work investigates experimentally the near-infrared optical properties of SiO2 thin film embedded with tungsten (W) nanoparticles at varying volume fractions. The samples are prepared by using the technique of magnetron sputtering. The formation and distribution of W nanoparticles are characterized using transmission electron microscopy, and the volume fraction of W nanoparticles is validated by Auger electron spectroscopy. Near- and mid-infrared diffuse reflectance measurements are conducted using Fourier transform infrared spectroscopy. The samples exhibit wavelength selective optical response in the near-infrared region and are suitable for applications involving selective thermal emitters/absorbers. Measured reflectance data is utilized to estimate the effective dielectric function of the nano-composites. Calculated reflectance spectra in different samples are compared to the measured spectra using the experimentally measured dielectric function of these samples in the near-infrared region. Reflectance spectra after thermal annealing at different temperature are compared to show how the thermal treatment affects the optical properties of samples. Optimized structures are proposed for thermal emitters and absorbers with different volume fractions of W nanoparticles.
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Affiliation(s)
- Yanpei Tian
- Department of Mechanical, Industrial and Systems Engineering, University of Rhode Island, Kingston, RI 02881,
USA
| | - Alok Ghanekar
- Department of Mechanical, Industrial and Systems Engineering, University of Rhode Island, Kingston, RI 02881,
USA
| | - Lijuan Qian
- Department of Physics, Brown University, Providence, RI 02912,
USA
| | - Matthew Ricci
- Department of Chemical Engineering, University of Rhode Island, Kingston, RI 02881,
USA
| | - Xiaojie Liu
- Department of Mechanical, Industrial and Systems Engineering, University of Rhode Island, Kingston, RI 02881,
USA
| | - Gang Xiao
- Department of Physics, Brown University, Providence, RI 02912,
USA
| | - Otto Gregory
- Department of Chemical Engineering, University of Rhode Island, Kingston, RI 02881,
USA
| | - Yi Zheng
- Department of Mechanical, Industrial and Systems Engineering, University of Rhode Island, Kingston, RI 02881,
USA
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