Nanostrip-Induced High Tunability Multipolar Fano Resonances in a Au Ring-Strip Nanosystem

Yi, Zao; Li, Xin; Xu, Xibin; Chen, Xifang; Ye, Xin; Yi, Yong; Duan, Tao; Tang, Yongjian; Liu, Jiangwei; Yi, Yougen

doi:10.3390/nano8080568

Cited by 32 publications

(13 citation statements)

References 40 publications

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“…Graphene has attracted much interest because of its high carrier mobility and the advantages of doping or having regular structure patterning in the broadband region [22,23]. Graphene supports surface plasmon resonance (SPR) in the infrared and terahertz bands [24,25,26,27,28].…”

Section: Introductionmentioning

confidence: 99%

Tunable Graphene-based Plasmonic Perfect Metamaterial Absorber in the THz Region

Chen

Cen

et al. 2019

Micromachines

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The optical performance of a periodically tunable plasma perfect metamaterial absorber based on a square-square-circle array we propose in the terahertz region is analyzed in this work by the finite difference time domain (FDTD) method. We not only discuss the impact of various parameters such as period a, length L, radius R, and incident angle θ under transverse magnetic (TM)- and transverse electric (TE)-polarization on the absorption spectra of the absorber but also study the effect of the Fermi energy EF and relaxation time τ. Finally, we simulate the spectra as the surrounding refractive index n changes to better evaluate the sensing performance of the structure, producing a sensitivity S of the structure of up to 15006 nm/RIU. On account of this research, we find that the absorber is beneficial to sensors and detectors in the terahertz region.

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Section: Introductionmentioning

confidence: 99%

Tunable Graphene-based Plasmonic Perfect Metamaterial Absorber in the THz Region

Chen

Cen

et al. 2019

Micromachines

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“…With such a generator, mechanical energy can be converted into electrical energy at the nanometer scale [38,39]. There are many methods for preparing ZnO nanomaterials, such as magnetron sputtering, hydrothermal synthesis, sol-gel, electrochemical, chemical vapor deposition [40,41,42,43,44,45,46,47,48,49,50,51,52]. Table 1 shows common methods [53,54,55,56] and information for growing ZnO nanorods.…”

Section: Introductionmentioning

confidence: 99%

Fabriction of ZnO Nanorods with Strong UV Absorption and Different Hydrophobicity on Foamed Nickel under Different Hydrothermal Conditions

Chen

et al. 2019

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ZnO nanorods have been grown on the surface of foamed nickel by a two-step method. Firstly, a layer of ZnO seed is sputtered on the surface of the foamed nickel by magnetron sputtering, and then the hydrothermal method is used to grow ZnO nanorods at different conditions (solution concentration, reaction time and reaction temperature). The results show that the morphology of ZnO nanorods is closely related to the solution concentration, reaction time, and reaction temperature. The energy band structure formed by the foamed nickel and ZnO seed layers and the growth mechanism of ZnO nanorods are discussed. The samples are characterized by Energy dispersive spectrometer (EDS), X-ray diffraction (XRD), and Raman spectroscopy. The absorption characteristics of samples to light are characterized by ultraviolet-to-visible (UV–VIS) absorption. The hydrophilicity of the samples is characterized by the static contact angle. By analyzing the performance characteristics of the samples at different conditions, we finally obtained the optimal growth parameters. At the optimal parameters, the morphology of the grown nanorods is regular, the ultraviolet band has strong absorption, and the surface of the samples forms a superhydrophobic surface.

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“…Surface-enhanced Raman scattering spectroscopy technology is a powerful analytical tool for real-time and ultra-high sensitive detection of the intended analyte in numerous fields such as food safety, laboratory medicine, chemical sensing, and environment monitoring. The SERS technique can achieve single molecule level detection with nearly 14 orders of magnitude Raman signal enhancement, which has been attracting a lot of attention [ 21 , 22 , 23 , 24 , 25 ]. For example, Xu et al [ 26 ] created a highly-uniform and ordered SERS substrate on hydrophobic Si nanopillar array by droplet-confined electroless deposition (DCED) method.…”

Section: Introductionmentioning

confidence: 99%

Seed-Mediated Electroless Deposition of Gold Nanoparticles for Highly Uniform and Efficient SERS Enhancement

Tang

Zhou

et al. 2019

Nanomaterials

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A seed-mediated electroless deposition (SMED) approach for fabrication of large-area and uniform gold nanoparticle films as efficient and reproducible as surface-enhanced Raman scattering (SERS) substrates was presented. This approach involved a seeding pretreatment procedure and a subsequent growth step. The former referred to activation of polylysine-coated glass slides in gold seed solution, and the latter required a careful control of the reactant concentration and reaction time. With the aid of gold seeds and appropriate reaction conditions, a large-area and uniform nanofilm with evenly distributed gold nanoparticles (Au NPs) was formed on the surface of the substrates after adding a mixed solution containing ascorbic acid and trisodium citrate. The morphology of the Au nanofilm was examined by scanning electron microscopy. The size evolution of Au NPs on the surface of the substrates was analyzed in detail. The nanofilm substrate was prepared by reaction conditions of the seeded activation process: 10 mL ascorbic acid and trisodium citrate mixture and 30 min of soaking time, which exhibited an excellent uniformity and reproducibility of SERS enhancement with relative standard deviation (RSD) values of less than 8% (particularly, a RSD value of 3% can be reached for the optimized measurement). Compared to the common electroless deposition, the seed-mediated electroless deposition possessed inherent advantages in controllability, reproducibility, and economic benefit.

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Nanostrip-Induced High Tunability Multipolar Fano Resonances in a Au Ring-Strip Nanosystem

Cited by 32 publications

References 40 publications

Tunable Graphene-based Plasmonic Perfect Metamaterial Absorber in the THz Region

Tunable Graphene-based Plasmonic Perfect Metamaterial Absorber in the THz Region

Fabriction of ZnO Nanorods with Strong UV Absorption and Different Hydrophobicity on Foamed Nickel under Different Hydrothermal Conditions

Seed-Mediated Electroless Deposition of Gold Nanoparticles for Highly Uniform and Efficient SERS Enhancement

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