Hybrid graphene metasurface for near-infrared absorbers

Rahman, Md. Mahfuzur; Raza, Aikifa; Younes, Hammad; AlGhaferi, Amal; Chiesa, Matteo; Lu, Jin-You

doi:10.1364/oe.27.024866

Cited by 12 publications

(6 citation statements)

References 45 publications

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“…Most recently, several organic additives such as graphene, graphene oxide, starch, cellulose, graphitic carbon nitride (GCN, g-C 3 N 4 ) and so forth have been used for the preparation of shielding materials. They have been blended with polymeric reinforced materials which can provide additional functionality to a polymeric matrix such as optical, mechanical, and electrical properties.…”

Section: Introductionmentioning

confidence: 99%

Nontoxic Cross-Linked Graphitic Carbon Nitride-Alginate-Based Biodegradable Transparent Films for UV and High-Energy Blue Light Shielding

Hasan

Hossain

Islam

et al. 2023

ACS Appl. Mater. Interfaces

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Flexible, transparent, and biodegradable films that can shield dangerous UV and high-energy blue light (HEBL) are high in demand to satisfy the ever-increasing expectations for environmental sustainability. To achieve this goal, biopolymer alginate is an excellent choice that has an outstanding film-forming ability. However, alginate has the limitation of poor UV and HEBL blocking ability. Thus, in this study, UV and HEBL blocker graphitic carbon nitride (g-C 3 N 4 ) was incorporated in alginate films to enhance the compatibility, applicability, and durability. The ATR-FTIR, TGA, DTG, and FE-SEM results indicated that the composite film formation was due to hydrogen bonding, and the composite films revealed synergistic properties of alginate and g-C 3 N 4 . Though the incorporation of g-C 3 N 4 in films enhanced the mechanical and thermal stabilities of the films, the films were still flexible. The UV−visible transmittance characterization confirmed that the prepared films could block both UV and HEBL radiation while maintaining transparency in visible regions. In experiments involving only 2 wt % g-C 3 N 4 , nearly 90% of UV (200−400 nm) and 95% of HEBL (400−450 nm) irradiation were blocked. Additionally, the inclusion of g-C 3 N 4 also facilitated the biodegradation process of composite films. Moreover, after 6 months, the composite films exhibited excellent UV and HEBL shielding with excellent mechanical durability.

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Section: Introductionmentioning

confidence: 99%

Nontoxic Cross-Linked Graphitic Carbon Nitride-Alginate-Based Biodegradable Transparent Films for UV and High-Energy Blue Light Shielding

Hasan

Hossain

Islam

et al. 2023

ACS Appl. Mater. Interfaces

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“…After fully considering the emission spectra, the mechanics, and the thermal lattice matching, a fourlayer (Si/Mo/AlN on a polished Mo substrate) thermal emitter is designed. Compared to the nanostructures like photonic crystals and metasurfaces, [36][37][38][39][40][41][42][43][44][45][46] this fabrication of the emitter is highly scalable without complicated microscale interfaces, ensuring the high-temperature stability at least up to 973 K (testing in the atmospheric environment) for the corresponding device combined with the careful choice of materials. The DCEA provides two emission channels assisting the emitter to have a stepfunction-like spectrum through interference which contributes to the sharp emission cut-off at the falling edge and the suppression of the emission in the mid-infrared.…”

Section: Introductionmentioning

confidence: 99%

Spectrum‐Selective High‐Temperature Tolerant Thermal Emitter by Dual‐Coherence Enhanced Absorption for Solar Thermophotovoltaics

Zhang,

Zhong,

Lin

et al. 2023

Advanced Optical Materials

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Solar thermophotovoltaics (STPV) receive considerable attention for the record high energy transfer efficiency beyond conventional photovoltaics systems, which requires a well‐designed structured absorber/emitter and high operating temperature. However, the inherent tradeoff between increased operation temperature and material/structure stability (especially for the thermal emitters) severely hinders the development of STPV. In this work, a new design is proposed for a step‐function‐like thermal emitter based on a two‐path (quasi) coherent perfect absorption effect, which is experimentally enabled by a few‐layer Si/Mo/AlN lamellar film on a Mo substrate through a sequential physical vapor deposition process. The as‐prepared lamellar emitter exhibits maximal emissivity of ≈97% for 1.4 µm with excellent thermal suppression down to 10% across 3.4–10 µm, the performance of which is well maintained up to 973 K. When employed in the established STPV system, the dual coherent enhanced absorption (DCEA) system contributes to an increase of 20% in the total system efficiency compared to the unimodal coherent perfect absorption counterpart. The design proposed in this study provides a new methodology for improving the efficiency of the STPV system and may have significant applications in improving thermal energy regulation for compact systems.

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“…One-dimensional carbon nanomaterials include carbon nanotubes (CNTs), carbon nanofibers or nanowires and carbon nanohorns (CNHs), as one dimension of these materials are outside of the nanoscale [42]. Two-dimensional (2D) carbon nanomaterials include graphene, graphene nanoribbons and few-layer graphene with sheet-like structures with nanoscale thicknesses [9,18,[43][44][45][46][47].…”

Section: Introductionmentioning

confidence: 99%

Carbon Nanomaterial-Based Lubricants: Review of Recent Developments

Rahman¹,

Islam²,

Roy³

et al. 2022

Lubricants

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This review article summarizes the progress of research on carbon nanomaterial-based lubricants witnessed in recent years. Carbon nanomaterials, such as graphene, carbon nanotubes (CNTs), fullerenes and carbon nanostructures, are at the center of current tribological research on attaining superior lubrication performance. The development of nanomaterial-based solid lubricants, lubricant additives and bulk materials and the related issues in their processing, characterization and applications as well as their tribological performance (coefficient of friction and wear rate) are listed in a structured tabulated form. Firstly, regarding nanomaterial-based solid lubricants, this study reveals that carbon nanomaterials such as graphite, graphene, graphene-based coatings and diamond-like carbon (DLC)-based coatings increase different tribological properties of solid lubricants. Secondly, this study summarizes the influence of graphene, carbon nanotubes, fullerene, carbon nanodiamonds, carbon nano-onions, carbon nanohorns and carbon spheres when they are used as an additive in lubricants. Thirdly, a structured tabulated overview is presented for the use of carbon nanomaterial-reinforced bulk material as lubricants, where graphene, carbon nanotubes and carbon nanodiamonds are used as reinforcement. Additionally, the lubricity mechanism and superlubricity of carbon nanomaterial-based lubricants is also discussed. The impact of carbon nanotubes and graphene on superlubricity is reviewed in detail. It is reported in the literature that graphene is the most prominent and widely used carbon nanomaterial in terms of all four regimes (solid lubricants, lubricating additives, bulk material reinforcement and superlubricity) for superior tribological properties. Furthermore, prospective challenges associated with lubricants based on carbon nanomaterials are identified along with future research directions.

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Hybrid graphene metasurface for near-infrared absorbers

Cited by 12 publications

References 45 publications

Nontoxic Cross-Linked Graphitic Carbon Nitride-Alginate-Based Biodegradable Transparent Films for UV and High-Energy Blue Light Shielding

Nontoxic Cross-Linked Graphitic Carbon Nitride-Alginate-Based Biodegradable Transparent Films for UV and High-Energy Blue Light Shielding

Spectrum‐Selective High‐Temperature Tolerant Thermal Emitter by Dual‐Coherence Enhanced Absorption for Solar Thermophotovoltaics

Carbon Nanomaterial-Based Lubricants: Review of Recent Developments

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