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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
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
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
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
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
Transparent Thermally Tunable Microwave Absorber Prototype Based on Patterned VO2 Film Article
Zhengang Lu, Yilei Zhang, Heyan Wang, Chao Xia, Yunfei Liu, Shuliang Dou, Yao Li, Jiubin Tan
Engineering 2023, Volume 29, Issue 10, Pages 198-206 doi: 10.1016/j.eng.2022.10.005
Transparent microwave absorbers that exhibit high optical transmittance and microwave absorption capability are ideal, although having a fixed absorption performance limits their applicability. Here, a simple, transparent, and thermally tunable microwave absorber is proposed, based on a patterned vanadium dioxide (VO2) film. Numerical calculations and experiments demonstrate that the proposed VO2 absorber has a high optical transmittance of 84.9% at 620 nm; its reflection loss at 15.06 GHz can be thermally tuned from –4.257 to –60.179 dB, and near-unity absorption is achieved at 523.75 K. Adjusting only the patterned VO2 film duty cycle can change the temperature of near-unity absorption. Our VO2 absorber has a simple composition, a high optical transmittance, a thermally tunable microwave absorption performance, a large modulation depth, and an adjustable temperature tuning range, making it promising for application in tunable sensors, thermal emitters, modulators, thermal imaging, bolometers, and photovoltaic devices.
Keywords： Tunable microwave absorber VO2 film Optical transparent Near unity absorption Large modulation depth
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
Conference Date: 19 Oct 2019
Conference Place: 陕西西安
Administered by: 中国石墨烯产业技术创新战略联盟
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
Conference Date: 8 Jul 2019
Conference Place: 泰国曼谷
Administered by: 武汉博胜学术交流有限公司
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
From Terahertz Imaging to Terahertz Wireless Communications Review
Yi Huang,Yaochun Shen,Jiayou Wang
Engineering 2023, Volume 22, Issue 3, Pages 106-124 doi: 10.1016/j.eng.2022.06.023
Terahertz (THz) technology is probably best known to the public as a powerful tool for imaging, since it has been applied in security and medical scanning, resulting in numerous impressive images that would be unobtainable using other technologies. With the roll-out of 5G mobile networks, research into 6G wireless communications is heating up. It is envisioned that THz technology will be used for 6G and future wireless communications. In this paper, we review how THz technology has been employed for imaging and wireless communications, identify state-of-the-art developments in the field, and then examine and compare common devices and issues in both applications. The possibility of integrating THz imaging/sensing and wireless communications is considered, and challenges and future perspectives are presented and discussed. It is shown that THz technology is indeed a key enabling technology for both imaging and wireless communications in the future.
Keywords： Communications Imaging Terahertz technology Wireless communications
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
Graphene-based siliconmodulators
Hao-wen SHU, Ming JIN, Yuan-sheng TAO, Xing-jun WANG
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
Preparation and characterization of mixed matrix RO membrane of polyamide and GO
Lu Ying,Zhao Haiyang,Zhang Lin,Hou Li´an
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
Transparent Thermally Tunable Microwave Absorber Prototype Based on Patterned VO2 Film
Zhengang Lu, Yilei Zhang, Heyan Wang, Chao Xia, Yunfei Liu, Shuliang Dou, Yao Li, Jiubin Tan
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
2019中国国际石墨烯创新大会
19 Oct 2019
Conference Information
2019石墨烯新型纳米材料缺陷工程国际研讨会
20 Sep 2019
Conference Information
Advances in Molecular Electronics: A Brief Review
Paven Thomas Mathew, Fengzhou Fang
Journal Article
第一届石墨烯与新型纳米材料国际会议(GNN 2019)
8 Jul 2019
Conference Information
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
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