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Ultra-broadband microwave absorber and high-performance pressure sensor based on aramid nanofiber,polypyrrole and nickel porous aerogel

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International Journal of Minerals,Metallurgy and Materials 2024年第8期31卷 1912-1921页

作者： Leyi Zhang Hongyu Jin Hanxin Liao Rao Zhang Bochong Wang Jianyong Xiang congpu mu Kun Zhai Tianyu Xue Fusheng Wen State Key Laboratory of Metastable Materials Science&Technology Yanshan UniversityQinhuangdao 066004China Key Laboratory for Microstructural Material Physics of Hebei Province School of ScienceYanshan UniversityQinhuangdao 066004China

Electronic devices have become ubiquitous in our daily lives,leading to a surge in the use of microwave absorbers and wearable sensor devices across various sectors.A prime example of this trend is the aramid nanofibers/polypyrrole/nickel(APN)aerogels,which serve dual roles as both microwave absorbers and pressure *** this work,we focused on the preparation of aramid nanofibers/polypyrrole(AP15)aerogels,where the mass ratio of aramid nanofibers to pyrrole was 1:*** employed the oxidative polymerization method for the preparation *** this,nickel was thermally evaporated onto the surface of the AP15 aerogels,resulting in the creation of an ultralight(9.35 mg·cm^(-3)).This aerogel exhibited a porous *** introduction of nickel into the aerogel aimed to enhance magnetic loss and adjust impedance matching,thereby improving electromagnetic wave absorption *** minimum reflection loss value achieved was-48.7 dB,and the maximum effective absorption bandwidth spanned 8.42 GHz with a thickness of 2.9 *** impressive metrics can be attributed to the three-dimensional network porous structure of the aerogel and perfect impedance ***,the use of aramid nanofibers and a three-dimensional hole structure endowed the APN aerogels with good insulation,flame-retardant properties,and compression *** under a compression strain of 50%,the aerogel maintained its resilience over 500 *** incorporation of polypyrrole and nickel particles further enhanced the conductivity of the ***,the final APN aerogel sensor demonstrated high sensitivity(10.78 kPa-1)and thermal *** conclusion,the APN aerogels hold significant promise as ultra-broadband microwave absorbers and pressure sensors.

关键词： porous aerogel aramid nanofibers microwave absorbers pressure sensor porous structure

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Robust enhancement of valley polarization and quantum yield in composition grading lateral heterostructure of MoS2-WS2 monolayer

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Progress in Natural Science:Materials International 2024年第1期34卷 187-193页

作者： Mengke Kang Cheng Zhang congpu mu Kun Zhai Tianyu Xue Bochong Wang Fusheng Wen Yingchun Cheng Jianyong Xiang Jun-Feng Dai Anmin Nie Zhongyuan Liu Center for High Pressure Science State Key Laboratory of Metastable Materials Science and Technology Yanshan University Shenzhen Institute for Quantum Science and Engineering and Department of Physics Southern University of Science and Technology Shenzhen Key Laboratory of Quantum Science and Engineering

Valley degeneracy can be broken owing to the strong spin-orbit coupling in two-dimensional transition metal dichalcogenides（2D-TMDCs）. Valley-dependent interaction of carriers in TMDCs with different circular polarizations of light offers valley degree-of-freedom besides charge and spin to carry information. Thus, bandgap engineering of 2D-TMDCs plays a critical role in developing practical valleytronic devices. Hereby, we demonstrate a great enhancement in quantum yield as well as polarization of monolayer MoS2achieved by gradually alloying W atoms in MoS2. By appropriately setting a time offset between the evaporation of MoO3and WO3precursors during chemical vapor deposition, a compositionally graded heterostructure of MoS2-WS2monolayer can be readily grown at large scale. Raman and transmission electron microscopy measurements demonstrate that the interface possesses a steep gradient in composition, spanning from MoS2to WS2over a length ～2 μ*** to pure monolayer MoS2, the photoluminescence intensity at the compositionally graded interface of Mo1-xWxS2was observed to increase by a factor of 16 owing to the effective separation of photogenerated carriers by the built-in electric field. Particularly, a remarkably high polarization of 70% at 16 K is demonstrated for the compositionally graded interface of Mo1-xWxS2, which is ～1.4 times larger than that in MoS2and is attributed to the combined effect of the alloyed structure and graded bandgap. Such an engineering scheme with a graded bandgap offers new approach for the development of high-efficiency valleytronics devices.

关键词： Transition metal dichalcognide monolayer Compositionally graded in-plane heterostructure Chemical vapor deposition Valley polarization Quantum yield

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Composites of In/C hexagonal nanorods and graphene nanosheets for high-performance electromagnetic wave absorption

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International Journal of Minerals,Metallurgy and Materials 2023年第3期30卷 485-493页

作者： Rao Zhang congpu mu Bochong Wang Jianyong Xiang Kun Zhai Tianyu Xue Fusheng Wen State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao 066004China Hebei Key Laboratory of Microstructure Materials Physics School of ScienceYanshan UniversityQinhuangdao 066004China

In recent years,electromagnetic wave(EMW)absorption has been extensively investigated for solving EMW radiation and *** metal-organic frameworks(MOFs)have attracted attention due to their low density and unique structure,which can meet the requirements of strong reflection loss(RL)and wide absorption bandwidth of EMW absorption *** this manuscript,indium nanoparticles/porous carbon(In/C)nanorods composites were prepared via the pyrolysis of nanorods-like In-MOFs at a low temperature of450°*** nanoparticles are evenly attached and embedded on porous *** electrical conductivity of In/C nanorods is unfavorable to EMW absorption performance,which is due to the low temperature ***,graphene(Gr)nanosheets with high electrical conductivity are introduced to adjust electromagnetic parameters of In/C nanorods for enhancing EMW *** minimum RL of the In/C-Gr-4 composite is up to-43.7 dB with a thin thickness of 1.30 *** addition,when the thickness is further reduced to 1.14 mm,the minimum RL of-39.3 dB at 16.1 GHz and effective absorption bandwidth of 3.7 GHz(from 14.3 to 18.0 GHz)can be *** work indicates that In/C-Gr composites show excellent EMW absorption performance.

关键词： electromagnetic wave absorption metal-organic frameworks indium nanoparticles nanorod graphene permittivity

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Broadband light absorption and photoresponse enhancement in monolayer WSe_(2) crystal coupled to Sb_(2)O_(3) microresonators

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Nano Research 2022年第5期15卷 4653-4660页

作者： Kun Ye Lixuan Liu congpu mu Kun Zhai Shiliang Guo Bochong Wang Anmin Nie Shuhan Meng Fusheng Wen Jianyong Xiang Tianyu Xue Ming Kang Yongji Gong Yongjun Tian Zhongyuan Liu Center for High Pressure Science(CHiPS) State Key Laboratory of Metastable Materials Science&TechnologyYanshan UniversityQinhuangdao 066004China Hebei Key Laboratory of Microstructure Materials Physics School of ScienceYanshan UniversityQinhuangdao 066004China School of Materials Science and Engineering Beihang UniversityBeijing 100191China School of Electrical Engineering Yanshan UniversityQinhuangdao 066004China College of Physics and Materials Science Tianjin Normal UniversityTianjin 300387China

Monolayer(1L)transition metal dichalcogenides(TMDCs)have been attracting tremendous interest in recent years as promising candidate materials in atomic-scale optoelectronic devices due to their direct band gaps(1.5-2.2 eV)and strong light-matter ***,their practical applications are limited by low visible light absorption stemming from atomic thickness and negligible infrared ***,we report the triangular Sb_(2)O_(3) microresonators in wide thickness and lateral size distributions grown on 1L TMDCs and their created significant broadband enhancement of light adsorption and photoresponse in 1L WSe_(2) crystal via coexisting Fabry-Perot and whispering gallery type *** an example of demonstration,1L WSe_(2) crystal coupled to Sb_(2)O_(3) microresonators with widely distributed sizes exhibits the enhanced visible light absorption by up to 5 folds and the simultaneously extended near infrared(NIR)one of more than 50%.For application of 1L WSe_(2) in photodetection,incorporation of Sb2O3 microresonators leads to significantly enhanced visible light responsivity by~10^(4) order and expanded NIR one of more than 400 mA·W^(-1).Similar results have been observed in the other 1L W(Mo)dichalcogenides coupled to Sb2O3 *** work provides a new route for development of the high-performance monolayer TMDCs-based optoelectronic devices.

关键词： transition metal dichalcogenides Sb_(2)O_(3)optical microresonator photodetectors enhanced absorption broad bandwidth

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Microwave Synthesized In2S3@CNTs with Excellent Properties in Lithium-Ion Battery and Electromagnetic Wave Absorption

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Chinese Journal of Chemistry 2018年第2期36卷 157-161页

作者： Cong Wang congpu mu Jianyong Xiang Bochong Wang Can Zhang Jiefang Song Fusheng Wen State Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao Hebei 066004 China Hebei Key Laboratory of Microstructure Material Physics Yanshan University Qinhuangdao Hebei 066004 China

The three-dimensional nanoflower-like β-In2S3 composited with carbon nanotubes {CNTs） has been synthesized by a single mode micro- wave-assisted hydrothermal technique. The In2S3 and CNTs nanocomposites （In2S3@CNTs） were investigated as the anode materials of lithium batteries （LIBs） and the electromagnetic wave absorption materials. For LIBs applications, the In2S3@CNTs nanocomposite exhibited excellent cycling stability with a high reversible charge capacity of 575 mA·h·g-1 after 300 cycles at 0.S A·g^-1, In addition, the In2S3@CNTs used as electromagnetic wave absorber displayed a maximum reflection loss of-42.75 dB at 11.96 GHz with a thickness of 1.55 ram.

关键词： In2S3 carbon nanotubes lithium ion batteries electromagnetic wave absorption hydrothermal

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Broadband photodetector of high quality Sb2S3 nanowire grown by chemical vapor deposition

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Journal of Materials Science & Technology 2021年第16期75卷 14-20页

作者： Kun Ye Bochong Wang Anmin Nie Kun Zhai Fusheng Wen congpu mu Zhisheng Zhao Jianyong Xiang Yongjun Tian Zhongyuan Liu Center for High Pressure Science State Key Laboratory of Metastable Materials Science & Technology Yanshan University Key Laboratory for Microstructural Material Physics of Hebei Province School of Science Yanshan University

Low dimensional semiconductors can be used for various electronic and optoelectronic devices because of their unique structure and property. In this work, one-dimensional SbSnanowires(NWs) with high crystallinity were grown via chemical vapor deposition(CVD) technique on SiO/Si substrates. The SbSNWs exhibited needle-like structures with inclined cross-sections. The lengths of SbSnanowires changed from 7 to 13 μm. The photodetection properties of SbSnanowires were comprehensively and systematically characterized. The SbSphotodetectors show a broadband photoresponse ranging from ultraviolet(360 nm) to near-infrared(785 nm). An excellent specific detectivity of 2.1 × 101~4 Jones, high external quantum efficiency of 1.5 × 10~4%, sensitivity of 2.2 × 104 cm~2 Wand short response time of less than 100 ms was achieved for the SbSNW photodetectors. Moreover, the SbSNWs showed outstanding switch cycling stability that was beneficial to the practical applications. The high-quality SbSnanowires fabricated by CVD have great application potential in semiconductor and optoelectronic fields.

关键词： Sb 2 S 3 nanowires Photodetector Chemical Vapor Deposition

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Photoemission oscillation in epitaxially grown van derWaalsβ-In_(2)Se_(3)/WS_(2) heterobilayer bubbles

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Chinese Physics B 2021年第11期30卷 597-603页

作者：董继宇林康牟从普贾智研徐瑾聂安民王博翀向建勇温福昇翟昆薛天宇柳忠元 Center for High Pressure Science CHiPS State Key Laboratory of Metastable Materials Science&TechnologyYanshan UniversityQinhuangdao 066004China Key Laboratory of Microstructure Materials Physics of Hebei Province School of ScienceYanshan UniversityQinhuangdao 066004China

Thin films of millimeter-scale continuous monolayer WS_(2) have been grown on SiO_(2)/Si substrate,followed by the deposition ofβ-In_(2)Se_(3) crystals on monolayer WS2 to prepare In_(2)Se_(3)/WS_(2) van deWaals heterostructures by a two-step chemical vapor deposition(CVD)*** the growth of In_(2)Se_(3) at elevated temperatures,high densities of In_(2)Se_(3)/WS_(2) heterostructure bubbles with monolayer to multilayerβ-In_(2)Se_(3) crystals atop are *** of the resultantβ-In_(2)Se_(3)/WS_(2) heterostructure is greatly enhanced in intensity upon the formation of bubbles,which are evidenced by the Newton’s rings in optical image owing to constructive and destructive *** photoluminescence(PL)mapping images of monolayerβ-In_(2)Se_(3)/monolayer WS2 heterobilayer bubble,significant oscillatory behavior of emission intensity is demonstrated due to constructive and destructive ***,oscillatory behaviors of peak position are also observed and come from a local heating effect induced by an excitation laser *** oscillatory mechanism of PL is further verified by changing the exterior pressure of bubbles placed in a home-made vacuum *** addition,redshifted in peak position and broadening in peak width are observed due to strain effect during decreasing the exterior pressure of bubbles.

关键词： bubble monolayer WS2 heterostructure In_(2)Se_(3)

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Broadband photodetector of high quality SbS nanowire grown by chemical vapor deposition

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Journal of Materials Science & Technology 2021年第16期 14-20页

作者： Kun Ye Bochong Wang Anmin Nie Kun Zhai Fusheng Wen congpu mu Zhisheng Zhao Jianyong Xiang Yongjun Tian Zhongyuan Liu Center for High Pressure Science State Key Laboratory of Metastable Materials Science TechnologyYanshan UniversityQinhuangdao 066004China Key Laboratory for Microstructural Material Physics of Hebei Province School of ScienceYanshan UniversityQinhuangdao 066004China

Low dimensional semiconductors can be used for various electronic and optoelectronic devices because of their unique structure and *** this work,one-dimensional Sb2 S3 nanowires(NWs)with high crystallinity were grown via chemical vapor deposition(CVD)technique on SiO2/Si *** Sb2 S3 NWs exhibited needle-like structures with inclined *** lengths of Sb2S3 nanowires changed from 7 to 13μ*** photodetection properties of Sb2 S3 nanowires were comprehensively and systematically *** Sb2S3 photodetectors show a broadband photoresponse ranging from ultraviolet(360 nm)to near-infrared(785 nm).An excellent specific detectivity of 2.1×10^(14)Jones,high external quantum efficiency of 1.5×10^(4)%,sensitivity of 2.2×10^(4)cm^(2)W^(-1)and short response time of less than 100 ms was achieved for the Sb2 S3 NW ***,the Sb2S3 NWs showed outstanding switch cycling stability that was beneficial to the practical *** high-quality Sb2S3 nanowires fabricated by CVD have great application potential in semiconductor and optoelectronic fields.

关键词： Sb2S3 nanowires Photodetector Chemical Vapor Deposition

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多功能碳包覆的Ni@NiO纳米复合材料用于析氧反应、氧还原反应和锂离子电池电极的研究（英文）

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Science China Materials 2017年第10期60卷 947-954页

作者：徐冬阳牟从普王博翀向建勇阮文君温福昇杜夏柳忠元田永君 State Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao 066004 China Hebei Key Laboratory of Microstructure Material Physics Yanshan University Qinhuangdao 066004 China

本文成功合成了多功能的碳包覆Ni@NiO纳米复合材料,并将其用作析氧反应和氧还原反应催化剂以及锂离子电池的负极材料.扫描电镜和透射电镜照片表明Ni@NiO@C纳米复合物具有均一的球形核壳结构.将Ni@NiO@C纳米复合物用作氧还原反应的催化剂... 详细信息

本文成功合成了多功能的碳包覆Ni@NiO纳米复合材料,并将其用作析氧反应和氧还原反应催化剂以及锂离子电池的负极材料.扫描电镜和透射电镜照片表明Ni@NiO@C纳米复合物具有均一的球形核壳结构.将Ni@NiO@C纳米复合物用作氧还原反应的催化剂时,在浓度为0.1 mol L^(-1)的氢氧化钾溶液中以1600 rpm转速下连续反应15小时后,电流密度仍然可以保持在初始值的90%以上.作为析氧反应的催化剂时,在电流密度为10 mA cm^(-2)时Ni@NiO@C纳米复合物的活性电位是380 mV(***).同时线性拟合的塔菲尔斜率为55 mV dec^(-1).Ni@NiO@C纳米复合物被用作锂离子电池的负极材料时,在电流密度为200mA g^(-1)下循环400圈后,电池容量还可以达到750mA hg^(-1).结果表明,Ni@NiO@C纳米复合物用于氧还原反应、析氧反应和锂离子电池均具有优异的电化学性能.

关键词：氧还原反应锂离子电池纳米复合材料析氧反应碳包覆多功能电池电极纳米复合物

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碳包覆NiO@Ni纳米复合物微波吸收性能研究

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燕山大学学报 2018年第3期42卷 240-245页

作者：牟从普徐冬阳徐江红张灿温福昇燕山大学河北省微结构材料物理重点实验室河北秦皇岛066004 燕山大学亚稳材料制备技术与科学国家重点实验室河北秦皇岛066004

由于微波吸收材料在军事和民间的广泛应用,近年来微波吸收研究受到人们广泛地关注。本文成功合成了具有核壳结构的NiO@Ni@C纳米复合物。利用X射线衍射仪、扫描电镜、透射电镜和矢量网络分析仪研究NiO@Ni@C纳米复合物的晶体结构、形貌以... 详细信息

由于微波吸收材料在军事和民间的广泛应用,近年来微波吸收研究受到人们广泛地关注。本文成功合成了具有核壳结构的NiO@Ni@C纳米复合物。利用X射线衍射仪、扫描电镜、透射电镜和矢量网络分析仪研究NiO@Ni@C纳米复合物的晶体结构、形貌以及微波吸收性能。结果表明:碳均匀的包覆在磁性纳米颗粒NiO@Ni的表面。在微波频率在1~18 GHz范围内研究了NiO@Ni@C纳米复合物的微波吸收性能。NiO@Ni@C 2/1具有优异的微波吸收性能,微波吸收性能明显好于NiO@Ni@C 1/2和NiO@Ni@C 1/1。在微波频率为6.1 GHz,厚度为3.76 mm时,NiO@Ni@C 2/1的最小RL值可以达到-52.0 d B。在厚度为2.5 mm时,RL值低于-10 d B的吸收频宽为3.2 GHz(微波频率从8.3到11.5 GHz)。

关键词：碳基材料微波吸收纳米复合物 Ni

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