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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
Qing-feng LI,Shao-bo CHEN,Wei-ming WANG,Hong-wei HAO,Lu-ming LI
Frontiers of Information Technology & Electronic Engineering 2016, Volume 17, Issue 1, Pages 74-82 doi: 10.1631/FITEE.1500114
Thin metal sheets are often located in the coupling paths of magnetic coupling energy transfer (MCET) systems. Eddy currents in the metals reduce the energy transfer efficiency and can even present safety risks. This paper describes the use of etched fractal patterns in the metals to suppress the eddy currents and improve the efficiency. Simulation and experimental results show that this approach is very effective. The fractal patterns should satisfy three features, namely, breaking the metal edge, etching in the high-intensity magnetic field region, and etching through the metal in the thickness direction. Different fractal patterns lead to different results. By altering the eddy current distribution, the fractal pattern slots reduce the eddy current losses when the metals show resistance effects and suppress the induced magnetic field in the metals when the metals show inductance effects. Fractal pattern slots in multilayer high conductivity metals (e.g., Cu) reduce the induced magnetic field intensity significantly. Furthermore,transfer power, transfer efficiency, receiving efficiency, and eddy current losses all increase with the increase of the number of etched layers. These results can benefit MCET by efficient energy transfer and safe use in metal shielded equipment.
Keywords： Fractal pattern Metal-layer-shield Eddy current Magnetic coupling energy transfer
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
Zhiyong Wang, Zhijian Zhao, Jesse Baucom, Dan Wang, Liming Dai, Jian-Feng Chen
Engineering 2020, Volume 6, Issue 6, Pages 680-687 doi: 10.1016/j.eng.2019.12.018
Herein, we report on the effect of a high gravity field on metal-free catalytic reduction, taking the nitrobenzene (NB) reduction and methylene blue (MB) degradation as model reactions in a highgravity rotating tube reactor packed with three-dimensional (3D) nitrogen-doped graphene foam (NGF) as a metal-free catalyst. The apparent rate constant (kapp) of the metal-free catalytic reduction of NB in the rotating tube reactor under a high gravity level of 6484g (g = 9.81 m·s-2) was six times greater than that in a conventional stirred reactor (STR) under gravity. Computational fluid dynamics (CFD) simulations indicated that the improvement of the catalytic efficiency was attributed to the much higher turbulent kinetic energy and faster surface renewal rate in the high-gravity tube reactor in comparison with those in a conventional STR. The structure of the 3D metal-free catalysts was stable during the reaction process under a high gravity field, as confirmed by X-ray photoelectron spectroscopy (XPS) and Raman spectra. In the other model reaction, the rate of MB degradation also increased as the high gravity level increased gradually, which aligns with the result for the NB catalytic reduction system. These results demonstrate the potential to use a high-gravity rotating packed tube reactor for the process intensification of metal-free catalytic reduction reactions.
Keywords： High-gravity technology Process intensification Metal-free catalysts Carbon nanomaterials Catalytic reduction
Detectors for pulsed neutron and gamma-ray measurement
Ouyang Xiaoping
Strategic Study of CAE 2009, Volume 11, Issue 5, Pages 44-53
Detection system makes the core equipment for collecting feature information of radiation fields, and is the key point and technical basis for carrying out pulsed radiation detection. Its performance directly determines the choice of measuring method and the quality of measured data. A systematic description of characteristic parameters affecting its performance in pulsed radiation detection is the basis for the design, development, application and comprehensive performance assessment of the detection system. Main parameters of detection systems for measuring time spectrum and intensity of mixed pulsed neutron/gamma radiation fields include detection sensitivity, time response, energy response, linear current and discrimination of neutron to gamma rays, etc. To realize these parameters in designing a detection system, certain detection construction and technical principles have to be established in accordance with the basic interaction principles of neutron/gamma rays with materials. Designing principles include balancing energy collection with charge collection, geometry efficiency with high signal-noise ratio, separation of signal response from irradiation response, detection sensitivity with time response, overall performance with application reliability, etc. The designing technology of radiation detection systems can be developed with an integrated utilization of these principles.
Keywords： mixed neutron gamma-ray fields pulsed radiation detection detecting system designing techniques performance parameter
Xue-song CHEN
Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 10, Pages 1479-1487 doi: 10.1631/FITEE.1601101
Keywords： Generalized Hamilton-Jacobi-Bellman equation Nonlinear optimal control Galerkin approximation Legendre polynomials
Study of the Relationship Between Fractal Model Parameters and Roughness Parameter Ra
Pan Yuliang,Wu Liqun,Zhang Yundian
Strategic Study of CAE 2004, Volume 6, Issue 5, Pages 49-51
The W-M fractal model and the physical meaning of fractal parameters (D, G，y) are briefly introduced in this paper. The relationships between model parameters and roughness parameter Ra are studied theoretically. The simulation shows that their relationships are correct.
Keywords： W-M fractal model fractal parameters roughness Ra
Definition and Verification of Shape Meter Method
Zhang Jinzhi,Duan Chunhua,Zhu Jianqin
Strategic Study of CAE 2001, Volume 3, Issue 12, Pages 47-51
Shape survey and control mathematics model,analytical theory for shape stiffness and the shape and gauge coordination control law are called shape meter methcd. In this paper, two experimental methods had been adopted to verify the correctness and practicality of the shape meter method ： one is to roll aluminum plate and calculate the shape stiffness of mill and rolled piece, then survey aluminum plate crown to verify shape stiffness e-quation;the other is to calculate survey data off-line of hot continuous roll,and verify the shape survey and control mathematics model by self-adaptation method.
Keywords： shape meter methcxl shape stiffness equation survey and control mathematics model follow-up calculation self-adaptation
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
Improving the efficiency of magnetic coupling energy transfer by etching fractal patterns in the shielding metals
Qing-feng LI,Shao-bo CHEN,Wei-ming WANG,Hong-wei HAO,Lu-ming LI
Journal Article
Advances in Molecular Electronics: A Brief Review
Paven Thomas Mathew, Fengzhou Fang
Journal Article
Nitrogen-Doped Graphene Foam as a Metal-Free Catalyst for Reduction Reactions under a High Gravity Field
Zhiyong Wang, Zhijian Zhao, Jesse Baucom, Dan Wang, Liming Dai, Jian-Feng Chen
Journal Article
Galerkin approximationwith Legendre polynomials for a continuous-time nonlinear optimal control problem
Xue-song CHEN
Journal Article
Study of the Relationship Between Fractal Model Parameters and Roughness Parameter Ra
Pan Yuliang,Wu Liqun,Zhang Yundian
Journal Article
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