The Fabrication of Large-Area, Uniform Graphene Nanomeshes for High-Speed, Room-Temperature Direct Terahertz Detection

Yuan, Weiqing; Li, Min; Wen, Zhongquan; Sun, Yuhui; Ruan, Desheng; Zhang, Zhihai; Chen, Gang; Gao, Yang

doi:10.1186/s11671-018-2602-6

Cited by 19 publications

(8 citation statements)

References 38 publications

(30 reference statements)

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“…That said, recent developments in the¯eld have allowed for fabrication of large-area continuous and uniform graphene monolayers. 40,41 For example, graphene monolayers of $ 3:5 Â 1:5 cm 2 have been achieved. 40 Lastly, but not the least, the following dielectric material parameters will be considered in fabrication: for the silicon-air con¯guration in near-infrared as shown in Figs.…”

Section: Resultsmentioning

confidence: 99%

Tunable absorption characteristics in multilayered structures with graphene for biosensing

Jin

Zhou

Lai

2020

J. Innov. Opt. Health Sci.

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Graphene derivatives, possessing strong Raman scattering and near-infrared absorption intrinsically, have boosted many exciting biosensing applications. The tunability of the absorption characteristics, however, remains largely unexplored to date. Here, we proposed a multilayer configuration constructed by a graphene monolayer sandwiched between a buffer layer and one-dimensional photonic crystal (1DPC) to achieve tunable graphene absorption under total internal reflection (TIR). It is interesting that the unique optical properties of the buffer-graphene-1DPC multilayer structure, the electromagnetically induced transparency (EIT)-like and Fano-like absorptions, can be achieved with pre-determined resonance wavelengths, and furtherly be tuned by adjusting either the structure parameters or the incident angle of light. Theoretical analyses demonstrate that such EIT- and Fano-like absorptions are due to the interference of light in the multilayer structure and the complete transmission produced by the evanescent wave resonance in the configuration. The enhanced absorptions and the huge electrical field enhancement effect exhibit potentials for broad applications, such as photoacoustic imaging and Raman imaging.

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Section: Resultsmentioning

confidence: 99%

Tunable absorption characteristics in multilayered structures with graphene for biosensing

Jin

Zhou

Lai

2020

J. Innov. Opt. Health Sci.

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“…At last, a graphene nanomesh structure was fabricated by oxygen plasma etching. The layout of the graphene channel between the source and drain electrodes is shown in Figure 6a, which was processed by EBL [17]. The exploration of the graphene nanomesh is shown in the right image of Figure 6b.…”

Section: Fabrication Of Graphene Nanomesh By Ebl and Opementioning

confidence: 99%

Fabrication of Graphene Nanomesh FET Terahertz Detector

et al. 2021

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High sensitivity detection of terahertz waves can be achieved with a graphene nanomesh as grating to improve the coupling efficiency of the incident terahertz waves and using a graphene nanostructure energy gap to enhance the excitation of plasmon. Herein, the fabrication process of the FET THz detector based on the rectangular GNM (r-GNM) is designed, and the THz detector is developed, including the CVD growth and the wet-process transfer of high quality monolayer graphene films, preparation of r-GNM by electron-beam lithography and oxygen plasma etching, and the fabrication of the gate electrodes on the Si3N4 dielectric layer. The problem that the conductive metal is easy to peel off during the fabrication process of the GNM THz device is mainly discussed. The photoelectric performance of the detector was tested at room temperature. The experimental results show that the sensitivity of the detector is 2.5 A/W (@ 3 THz) at room temperature.

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“…Owing to their superior large periphery (compared to basal/planar structure), graphene mesh (GM) architectures, comprising of interconnected graphene wires, are believed as potent edge-rich graphene electrodes for advanced EC applications. Several methods have been employed to fabricate GM, including electron beam lithography [ 22 ], nanoimprint lithography [ 23 ], nanosphere-assisted lithography [ 24 , 25 ], template-assisted lithography [ 26 , 27 ], and self-organized growth [ 28 ]. However, most of these methods require complex lithography and etching (such as reactive ion etching or toxic etching solution) processes, which are costly and hard to scale up.…”

Section: Introductionmentioning

confidence: 99%

Edge-Rich Interconnected Graphene Mesh Electrode with High Electrochemical Reactivity Applicable for Glucose Detection

et al. 2021

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The development of graphene structures with controlled edges is greatly desired for understanding heterogeneous electrochemical (EC) transfer and boosting EC applications of graphene-based electrodes. We herein report a facile, scalable, and robust method to produce graphene mesh (GM) electrodes with tailorable edge lengths. Specifically, the GMs were fabricated at 850 °C under a vacuum level of 0.6 Pa using catalytic nickel templates obtained based on a crack lithography. As the edge lengths of the GM electrodes increased from 5.48 to 24.04 m, their electron transfer rates linearly increased from 0.08 to 0.16 cm∙s−1, which are considerably greater than that (0.056 ± 0.007 cm∙s−1) of basal graphene structures (defined as zero edge length electrodes). To illustrate the EC sensing potentiality of the GM, a high-sensitivity glucose detection was conducted on the graphene/Ni hybrid mesh with the longest edge length. At a detection potential of 0.6 V, the edge-rich graphene/Ni hybrid mesh sensor exhibited a wide linear response range from 10.0 μM to 2.5 mM with a limit of detection of 1.8 μM and a high sensitivity of 1118.9 μA∙mM−1∙cm−2. Our findings suggest that edge-rich GMs can be valuable platforms in various graphene applications such as graphene-based EC sensors with controlled and improved performance.

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The Fabrication of Large-Area, Uniform Graphene Nanomeshes for High-Speed, Room-Temperature Direct Terahertz Detection

Cited by 19 publications

References 38 publications

Tunable absorption characteristics in multilayered structures with graphene for biosensing

Tunable absorption characteristics in multilayered structures with graphene for biosensing

Fabrication of Graphene Nanomesh FET Terahertz Detector

Edge-Rich Interconnected Graphene Mesh Electrode with High Electrochemical Reactivity Applicable for Glucose Detection

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