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Graphene-metasurface for wide-incident-angle terahertz absorption Research
Ri-hui Xiong, Xiao-qing Peng, Jiu-sheng Li,lijsh2008@126.com
Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 3, Pages 287-436 doi: 10.1631/FITEE.2000079
Keywords： 石墨烯超表面；太赫兹吸收器；欧米伽形石墨烯图案
Preparation and characterization of mixed matrix RO membrane of polyamide and GO
Lu Ying,Zhao Haiyang,Zhang Lin,Hou Li´an
Strategic Study of CAE 2014, Volume 16, Issue 7, Pages 84-88
Grephene oxide (GO) mixed matrix reverse osmosis (RO) membranes were prepared with metaphenylenediamine(MPD) and trimesoyl chloride (TMC) by interfacial polymerization. Themorphology of the membraneswere characterized by scanning electron microscopy(SEM). The separation performance and chlorine resistance were also investigated.The results shown that owing to the hydrophilicity of GO, the membranes appeared to be more hydrophilic and had higher pure water fluxes than the bared polyamide RO membrane,only with a slight change of rejection. When the content of GO added in the aqueous phase was 0.005wt%, the flux of the membrane increased by 20%. The mixed matrix RO membrane of polyamide and GO shownbetterchlorine resistance than PA RO membrane.
Keywords： grapheme oxide polyamide mixed matrix membrane reverse osmosis chlorine resistance
Graphene-based siliconmodulators Special Feature on Optoelectronic Devices and Inte
Hao-wen SHU, Ming JIN, Yuan-sheng TAO, Xing-jun WANG
Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 4, Pages 458-471 doi: 10.1631/FITEE.1800407
Silicon photonics is a promising technology to address the demand for dense and integrated nextgeneration optical interconnections due to its complementary-metal-oxide-semiconductor (CMOS) compatibility. However, one of the key building blocks, the silicon modulator, suffers from several drawbacks, including a limited bandwidth, a relatively large footprint, and high power consumption. The graphene-based silicon modulator, which benefits from the excellent optical properties of the two-dimensional graphene material with its unique band structure, has significantly advanced the above critical figures of merit. In this work, we review the state-of-the-art graphenebased silicon modulators operating in various mechanisms, i.e., thermal-optical, electro-optical, and plasmonic. It is shown that graphene-based silicon modulators possess the potential to have satisfactory characteristics in intra- and inter-chip connections.
Keywords： Silicon photonics Graphene Optical modulator
High Quality Development of Graphite Resource and Graphite Material Industry
Sun Chuanyao , Shen Shifu , Wang Wenli , Yuan Guohui , Huang Zhenghong , Zhang Yihe
Strategic Study of CAE 2022, Volume 24, Issue 3, Pages 29-39 doi: 10.15302/J-SSCAE-2022.03.004
Natural graphite is a new-technology mineral resource led by new mineral preparation and application technologies and an important raw material that supports the development of China’s strategic emerging industries. This paper analyzes the demand for high-quality development of graphite resources and the graphite material industry, summarizes the development status, unveiled development potentials and major challenges, and puts forward goals for next stage development. Furthermore, this paper proposes the following measures: (1) establishing a technology innovation system that focuses on the deep processing of graphite; (2) optimizing the allocation of resources and boosting the development of green graphite plants and mines; (3) strengthening the capacities of platforms to consolidate the technological innovation foundation for industrial and supply chains; and (4) focusing on breakthroughs in the xclusive application of graphene’s uniqu physical properties and avoiding excessive marketing. Additionally, it is necessary to set up a sophisticate database that covers the entire industrial and supply chains of graphite, establish a long-term policy mechanism that supports the high-quality development of China’s graphite industry, accelerate resource integration to construct an international graphite valley, and improve innovation platforms to enhance talent trainning.
Keywords： graphite graphite deep processing graphite concentrate graphene fluorinated graphite
Development Status and Strategic Research of Graphene-Base Supercapacitors
Chen Jing, Guo Hongxia, Mao Weiguo, Liu Jianhong, Fu Yongsheng, Ouyang Xiaoping
Strategic Study of CAE 2018, Volume 20, Issue 6, Pages 75-81 doi: 10.15302/J-SSCAE-2018.06.012
Supercapacitors integrate advantages of both common capacitors and chemical batteries, and have significant advantages such as high power density, fast charging & discharging speed, and long cycle life. The key to developing supercapacitors is electrode materials, among which the most ideal one is graphene due to its excellent properties in mechanical, electrical, thermal and other aspects. Based on statistical analysis of academic papers and patents related to graphene-based supercapacitors, this paper discusses the development status and direction of graphene-based supercapacitors and briefly describes its domestic industrial development. The difficulties and challenges faced by the future development of graphene-based supercapacitors are discussed and the future development direction and suggestions are proposed.
Keywords： graphene supercapacitor electrode material power density energy density
Zhu Junyong,Wang Qiongke,Xu Xin,Liu Chuochuo,Liu Jindun,Zhang Yatao
Strategic Study of CAE 2014, Volume 16, Issue 7, Pages 23-29
Graphene oxide provides an ideal substrate for lysozyme immobilization due to a large specific surface area and abundant functional groups. The lysozyme immobilization on the GO sheets could take place readily by electrostatic interaction of GO-lysozyme (denoted as GO-Ly). The immobilized lysozyme of GO used as the addictive was blended with PES to prepare hybrid ultrafiltration membrane via phase inversion.The effect of GO-Ly content on the morphology, hydrophilic, separation, mechanical and antibacterial properties of hybrid membranes was investigated. The results showed that the surface hydrophilicity and water flux was significantly improved with the increase of GO-Ly content. Meanwhile, the mechanical strength of hybrid membrane was also increased. Especially for 1.5 wt.% of GO-Ly, the water flux reached up to 318 L/(m2?h). The rejection of PVA30000-70000 was 99% and the antibacterial rate of the hybrid membrane against E. coli could achieve 68%.
Keywords： Graphene oxide Lysozyme Polyethersulfone Ultrafiltration membrane Antibacterial property
Shuwen Chen, De-Yun Tang, Xue-Xue Zhang, Jie-Yao Lyu, Wei He, Peijin Liu, Qi-Long Yan
Engineering 2020, Volume 6, Issue 9, Pages 1019-1027 doi: 10.1016/j.eng.2020.02.014
A new group of energetic metastable intermixed composites (MICs) was designed and fabricated by means of the spray granulation technique. These MICs are composed of aluminum (Al) as the fuel, ammonium perchlorate (AP) and polyvinylidene fluoride (PVDF) as the co oxidizer. The AP/PVDF ratio was optimized by taking the maximum energy release as the criteria. A minor content of graphene oxide (GO) was also doped in the MICs to act as both lubricant and catalyst. It was shown that Al@AP/PVDF with 0.2% GO has the greatest density (2.57 g·cm–3 ) and highest heat of reaction (5999.5 J•g–1). These values are much higher than those of Al@AP/PVDF (2.00 g·cm–3 and 5569.8 J•g–1 ). The inclusion of GO increases the solidstate reaction rate of Al@AP/PVDF and improves the thermal stability. The flame propagation rate was increased up to 4.76 m·s–1 by doping with 0.2% GO, and was about 10.7% higher than that of Al@AP/ PVDF. Al@AP/PVDF-GO has a better interfacial contact and particle distribution, which results in an improved heat-transfer rate, freedom from the agglomeration of nano Al particles, and an improved combustion reaction rate. This work demonstrates a new strategy to improve the energy release rate and combustion efficiency of Al-based MICs.
Keywords： Metastable intermixed composites Al@AP/PVDF nanocomposites Graphene oxide Energy output Combustion characteristics
Pinghua Tang, Mulin Luo, Ting Zhao, Yuliang Mao,pinghuatang@xtu.edu.cn,1011773923@qq.com,zthaza@126.com,ylmao@xtu.edu.cn
Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 3, Pages 287-436 doi: 10.1631/FITEE.2000372
Keywords： 掺铒光纤激光器；石墨烯；可饱和吸收体；被动锁模
Microwave metamaterials: from exotic physics to novel information systems Review Articles
Rui-yuan WU, Tie-jun CUI
Frontiers of Information Technology & Electronic Engineering 2020, Volume 21, Issue 1, Pages 4-26 doi: 10.1631/FITEE.1900465
Keywords： Metamaterial Effective medium theory Metasurface Surface plasmon polaritons Digital coding Programmable Information
Fabrication of superhydrophobic SiO2/PS coatings on wood surface
Zhang Ming and Wang Chengyu
Strategic Study of CAE 2014, Volume 16, Issue 4, Pages 83-86
The silica particles with unique morphology and hydrophobicity have been synthesized via a one-step sol-gel process，which as well as polystyrene was employed in the bionic and stably superhydrophobic coatings with water contact angle of 153° and sliding angle less than 5° on wood surface by a drop-coating method. Scanning electron microscope (SEM) studies revealed that the composite coatings possess two dimensional hierarchical structures comprising of micron scale papilla and submicron scale granules. The synergistic effect of micron/submicron binary structure and low surface energy layer was responsible for the superhydrophobicity of wood surface. Moreover，the stability and durability of treated wood have been investigated as well，and the results showed that the product possesses superhydrophobic property in a wide extent，such as pure water，corrosive water under both acidic and basic conditions，some common organic solvents，which offers an opportunity to extend the range of practical applications for wood resources.
Keywords： superhydrophobic wood surface drop-coating method composite coatings
Super-Resolution Displacement Spectroscopic Sensing over a Surface “Rainbow” Article
Lyu Zhou, Nan Zhang, Chang Chieh Hsu, Matthew Singer, Xie Zeng, Yizheng Li, Haomin Song, Josep Jornet, Yun Wu, Qiaoqiang Gan
Engineering 2022, Volume 17, Issue 10, Pages 75-81 doi: 10.1016/j.eng.2022.03.018
Subwavelength manipulation of light waves with high precision can enable new and exciting applications in spectroscopy, sensing, and medical imaging. For these applications, miniaturized spectrometers are desirable to enable the on-chip analysis of spectral information. In particular, for imaging-based spectroscopic sensing mechanisms, the key challenge is to determine the spatial-shift information accurately (i.e., the spatial displacement introduced by wavelength shift or biological or chemical surface binding), which is similar to the challenge presented by super-resolution imaging. Here, we report a unique “rainbow” trapping metasurface for on-chip spectrometers and sensors. Combined with super-resolution image processing, the low-setting 4× optical microscope system resolves a displacement of the resonant position within 35 nm on the plasmonic rainbow trapping metasurface with a tiny area as small as 0.002 mm2. This unique feature of the spatial manipulation of efficiently coupled rainbow plasmonic resonances reveals a new platform for miniaturized on-chip spectroscopic analysis with a spectral resolution of 0.032 nm in wavelength shift. Using this low-setting 4× microscope imaging system, we demonstrate a biosensing resolution of 1.92 × 109 exosomes per milliliter for A549-derived exosomes and distinguish between patient samples and healthy controls using exosomal epidermal growth factor receptor (EGFR) expression values, thereby demonstrating a new on-chip sensing system for personalized accurate bio/chemical sensing applications.
Keywords： Rainbow trapping Metasurface Surface plasmon polaritons Super-resolution displacement On-chip biosensing
Advances in Molecular Electronics: A Brief Review Review
Paven Thomas Mathew, Fengzhou Fang
Engineering 2018, Volume 4, Issue 6, Pages 760-771 doi: 10.1016/j.eng.2018.11.001
The field of molecular electronics, also known as moletronics, deals with the assembly of molecular electronic components using molecules as the building blocks. It is an interdisciplinary field that includes physics, chemistry, materials science, and engineering. Moletronics mainly deals with the reduction of size of silicon components. Novel research has been performed in developing electrical-equivalent molecular components. Moletronics has established its influence in electronic and photonic applications, such as conducting polymers, photochromics, organic superconductors, electrochromics, and many more. Since there is a need to reduce the size of the silicon chip, attaining such technology at the molecular level is essential. Although the experimental verification and modeling of molecular devices present a daunting task, vital breakthroughs have been achieved in this field. This article combines an overview of various molecular components, such as molecular transistors, diodes, capacitors, wires, and insulators, with a discussion of the potential applications of different molecules suitable for such components. We emphasize future developments and provide a brief review of different achievements that have been made regarding graphene-based molecular devices.
Keywords： Moletronics Molecular transistor Molecular diode Molecular capacitor Molecular wire Graphene
Dispersion-engineered wideband low-profile metasurface antennas Review Articles
Wei E. I. LIU, Zhi Ning CHEN, Xianming QING
Frontiers of Information Technology & Electronic Engineering 2020, Volume 21, Issue 1, Pages 27-38 doi: 10.1631/FITEE.1900473
Keywords： Metasurface antenna Dispersion engineering Composite right/left-handed (CRLH) Guided wave Surface wave Wideband Low profile
Metamaterials: Reshape and Rethink Review
Ruopeng Liu, Chunlin Ji, Zhiya Zhao, Tian Zhou
Engineering 2015, Volume 1, Issue 2, Pages 179-184 doi: 10.15302/J-ENG-2015036
Metamaterials are composite materials whose material properties (acoustic, electrical, magnetic, or optical, etc.) are determined by their constitutive structural materials, especially the unit cells. The development of metamaterials continues to redefine the boundaries of materials science. In the field of electromagnetic research and beyond, these materials offer excellent design flexibility with their customized properties and their tunability under external stimuli. In this paper, we first provide a literature review of metamaterials with a focus on the technology and its evolution. We then discuss steps in the industrialization process and share our own experience.
Keywords： metamaterials metasurface smart structure metadevices industrialization
A Smart Metasurface for Electromagnetic Manipulation Based on Speech Recognition Article
Lin Bai, Yuan Ke Liu, Liang Xu, Zheng Zhang, Qiang Wang, Wei Xiang Jiang, Cheng-Wei Qiu, Tie Jun Cui
Engineering 2023, Volume 22, Issue 3, Pages 185-190 doi: 10.1016/j.eng.2022.06.026
In this work, we propose and realize a smart metasurface for programming electromagnetic (EM) manipulations based on human speech recognition. The smart metasurface platform is composed of a digital coding metasurface, a speech-recognition module, a single-chip computer, and a digital-to-analog converter (DAC) circuit, and can control EM waves according to pre-stored voice commands in a smart way. The constructed digital metasurface contains 6 × 6 super unit cells, each of which consists of 4 × 4 active elements with embedded varactor diodes. Together with the DAC and single-chip computer, the speech-recognition module can recognize voice commands and generate corresponding voltage sequences to control the metasurface. In addition, a genetic algorithm (GA) is adopted in the design of the metasurface for efficiently optimizing the phase distributions. To verify the performance of the smart metasurface platform, three typical functions are demonstrated: radar cross-section reduction, vortex beam generation, and beam splitting. The proposed strategy may offer a new avenue for controlling EM waves and establishing a link between EM and acoustic communications.
Keywords： Speech recognition Programmable metasurface Genetic algorithm Smart electromagnetic manipulation
Title Author Date Type Operation
Graphene-metasurface for wide-incident-angle terahertz absorption
Ri-hui Xiong, Xiao-qing Peng, Jiu-sheng Li,lijsh2008@126.com
Journal Article
Preparation and characterization of mixed matrix RO membrane of polyamide and GO
Lu Ying,Zhao Haiyang,Zhang Lin,Hou Li´an
Journal Article
Graphene-based siliconmodulators
Hao-wen SHU, Ming JIN, Yuan-sheng TAO, Xing-jun WANG
Journal Article
High Quality Development of Graphite Resource and Graphite Material Industry
Sun Chuanyao , Shen Shifu , Wang Wenli , Yuan Guohui , Huang Zhenghong , Zhang Yihe
Journal Article
Development Status and Strategic Research of Graphene-Base Supercapacitors
Chen Jing, Guo Hongxia, Mao Weiguo, Liu Jianhong, Fu Yongsheng, Ouyang Xiaoping
Journal Article
Preparation and antibacterial property of Polyethersulfone Hybrid Ultrafiltration Membrane Containing GO immobilized by Lysozyme
Zhu Junyong,Wang Qiongke,Xu Xin,Liu Chuochuo,Liu Jindun,Zhang Yatao
Journal Article
Enhancing the Combustion Performance of Metastable Al@AP/PVDF Nanocomposites by Doping with Graphene Oxide
Shuwen Chen, De-Yun Tang, Xue-Xue Zhang, Jie-Yao Lyu, Wei He, Peijin Liu, Qi-Long Yan
Journal Article
Generation of noise-like pulses and soliton rains in a graphene mode-locked erbium-doped fiber ring laser
Pinghua Tang, Mulin Luo, Ting Zhao, Yuliang Mao,pinghuatang@xtu.edu.cn,1011773923@qq.com,zthaza@126.com,ylmao@xtu.edu.cn
Journal Article
Microwave metamaterials: from exotic physics to novel information systems
Rui-yuan WU, Tie-jun CUI
Journal Article
Fabrication of superhydrophobic SiO2/PS coatings on wood surface
Zhang Ming and Wang Chengyu
Journal Article
Super-Resolution Displacement Spectroscopic Sensing over a Surface “Rainbow”
Lyu Zhou, Nan Zhang, Chang Chieh Hsu, Matthew Singer, Xie Zeng, Yizheng Li, Haomin Song, Josep Jornet, Yun Wu, Qiaoqiang Gan
Journal Article
Advances in Molecular Electronics: A Brief Review
Paven Thomas Mathew, Fengzhou Fang
Journal Article
Dispersion-engineered wideband low-profile metasurface antennas
Wei E. I. LIU, Zhi Ning CHEN, Xianming QING
Journal Article
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