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Nonreciprocal single-photon scattering mediated by a drivenΛ-type three-level giant atom

Communications in Theoretical Physics 2024年第11期76卷 113-122页

作者： Xiaopei Zhang Haozhen Li Ran Zeng Miao Hu Mengmeng Xu Xuefang Zhou Yang Lan Xiuwen Xia Jingping Xu Yaping Yang School of Communication Engineering Hangzhou Dianzi UniversityHangzhou 310018China Zhejiang Province Key Laboratory of Quantum Technology and Device Zhejiang UniversityHangzhou 310027China Institute of Atomic and Molecular Physics and Functional Materials School of Mathematics and PhysicsJinggangshan UnivsersityJi'an 343009China Key Laboratory of Advanced Micro-Structured Materials of Ministry of Education School of Physics Science and EngineeringTongji UniversityShanghai 200092China

A waveguide-QED with giant atoms,which is capable of accessing various limits of a small one,provides a new paradigm to study photon ***,how to achieve nonreciprocal photon transmissions via such a giant atom setup is highly *** this study,the nonreciprocal single-photon scattering characteristics of a double-drivenΛ-type three-level giant atom,where one of the transition couples to a 1D waveguide at two separate points,and the other is driven by two coherent driving fields,are *** is found that a frequency-tunable single-photon diode with an ideal contrast ratio can be achieved by properly manipulating the local coupling phases between the giant atom and the waveguide,the accumulation phase between the two waveguide coupling points,the Rabi frequencies and phase difference of the two driven *** to the previous single driving schemes,on the one hand,the presence of the second driving field can provide more tunable parameters to manipulate the nonreciprocal single-photon scattering *** the other hand,here perfect nonreciprocal transmission for photons with arbitrary frequencies is achievable by tuning the driving phases while the two driving fields keep on turning,which provides an alternative way to control the nonreciprocal single-photon ***,the results reveal that both the location and width of each optimal nonreciprocal transmission window is also sensitive to the driving detuning,and a single-photon diode with wide or narrow bandwidth can be realized based on *** results may be beneficial for designing nonreciprocal single-photon devices based on a double-driven giant atom setup.

关键词： giant atom nonreciprocal single-photon scattering waveguide-QED

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Phase engineering of a donor-doped air electrode for reversible protonic ceramic electrochemical cells

Advanced Powder Materials

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advanced Powder Materials 2024年第3期3卷 77-85页

作者： Kang Xu Hua Zhang Yangsen Xu Dongliang Liu Feng Zhu Fan He Ying Liu Haobing Wang Yu Chen School of Environment and Energy South China University of TechnologyGuangzhou 510006China State Key Laboratory of Materials-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 210009China Research Institute of Renewable Energy and Advanced Materials Zijin Mining Group Co.Ltd.Xiamen 361101China South China Advanced Institute for Soft Matter Science and Technology School of Emergent Soft MatterGuangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and DevicesSouth China University of TechnologyGuangzhou 510640China

Reversible protonic ceramic electrochemical cells(R-PCECs)demonstrate great feasibility for efficient energy storage and *** critical challenge for the development of R-PCECs is the design of novel air electrodes with the characteristics of high catalytic activity and acceptable ***,we report a donor doping of Hf into the B-site of a cobalt-based double perovskite with a nominal formula of PrBa_(0.8)Ca_(0.2)Co_(1.9)Hf_(0.1)O_(5tδ)(PBCCHf_(0.1)),which is naturally reconfigured to a double perovskite PrBa_(0.8-x)Ca_(0.2)Co_(1.9)Hf_(0.1)-xO5tδ(PBCCHf_(0.1)-x)backbone and nano-sized BaHfO3(BHO)on the surface of PBCCHf_(0.1)*** air electrode demonstrates enhanced catalytic activity and durability(a stable polarization resistance of 0.269Ωcm2 for~100 h at 600℃),due likely to the fast surface exchange process and bulk diffusion *** employed as an air electrode of R-PCECs,a cell with PBCCHf_(0.1) air electrode demonstrates encouraging performances in modes of the fuel cell(FC)and electrolysis(EL)at 600℃:a peak power density of 0.998 W cm^(-2)and a current density of1.613 A cm^(-2)at 1.3 V(with acceptable Faradaic efficiencies).More importantly,the single-cell with PBCCHf_(0.1) air electrode demonstrates good cycling stability,switching back and forth from FC mode to EL mode0.5 A cm^(-2)for 200 h and 50 cycles.

关键词： Reversible protonic ceramic electrochemical cells Donor doping Air electrode In situ reconfiguration Phase engineering

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Metamaterial-inspired infrared electrochromic devices with wideband microwave absorption for multispectral camouflage

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Photonics Research 2024年第11期12卷 2435-2446页

作者： ZHEN MENG DONGQING LIU JIAFU WANG YONGQIANG PANG TIANWEN LIU YAN JIA BOHENG GUI HAIFENG CHENG Science and Technology on Advanced Ceramic Fibers and Composites Laboratory College of Aerospace Science and EngineeringNational University of Defense TechnologyChangsha 410073China Shaanxi Key Laboratory of Artificially-Structured Functional Materials and Devices Air Force Engineering UniversityXi’an 710051China Electronic Materials Research Laboratory Key Laboratory of the Ministry of EducationXi’an Jiaotong UniversityXi’an 710049China

Infrared(IR)electrochromic devices,capable of dynamically controlling thermal radiation,hold promising applications in adaptive ***,the strong microwave reflective properties inherent in the device’s electrodes present a significant challenge,rendering them susceptible to radar detection and weakening their camouflage *** by the remarkable electromagnetic control capabilities of metamaterials,the integration of frequency selective surfaces into IR electrochromic devices is proposed to address this multispectral compatibility *** designed integrated metadevices simultaneously exhibit large and reversible IR emissivity tunability(Δε≥0.55 at 3–5μm,Δε≥0.5 at 7.5–13μm)and wideband microwave absorption(reflection loss≤-10 dB at 8.5–18 GHz).Furthermore,the monolithic integrated design of the shared barium fluoride substrate offers a simple device architecture,while careful design considerations mitigate coupling between IR electrochromism and microwave wideband *** work introduces opportunities for the development of multispectral adaptive camouflage systems,offering potential advancements in concealment technology.

关键词： microwave absorption spectral

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Nano-manufacturing of Co(OH)_(2)@NC for efficient oxygen evolution/reduction reactions

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Journal of Materials science & technology 2021年第22期81卷 131-138页

作者： Guanglu Li Chang Liu Zhao Zhang Baihua Cui Yanan Chen Yida Deng Wenbin Hu School of Materials Science and Engineering Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of EducationTianjin Key Laboratory of Composite and Functional MaterialsTianjin UniversityTianjin300072China Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityFuzhou350207China

Oxygen evolution and oxygen reduction are considered as essential processes in the energy conversion *** progress of cost-effective bifunctional catalysts has become a critical issue to be ***,we report that Co(OH)_(2)@N-doped carbon(NC)was facilely synthesized through the impregnation strategy of metal-organic frameworks derived carbon and cobalt ions.N-doped carbon with porous structure and cobalt hydroxide nanosheets play a synergistic effect role,representing excellent catalytic performance toward oxygen evolution and reduction *** obtained Co(OH)_(2)@NC exhibits remarkable activity in terms of a lower overpotential of 330 mV@10 mA cm^(-2) for OER and a more positive half-wave potential(E_(1/2)=0.84 V)for ORR in alkaline medium,outperforming IrO_(2) and Pt/*** to its superior bifunctional catalytic performance,Co(OH)_(2)@NC catalyst is applied into a promising air electrode of Zn-air *** presented strategy of impregnation synthesis in this work provides a new design direction for practical electrochemical energy devices.

关键词： Co(OH)_(2) Metal-organic framework Electrocatalyst Oxygen evolution reaction Oxygen reduction reaction

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Preparation and properties of CMAS resistant bixbyite structured high-entropy oxides RE_(2)O_(3)(RE=Sm,Eu,Er,Lu,Y,and Yb):Promising environmental barrier coating materials for Al_(2)O_(3)f/Al_(2)O_(3) composites

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Journal of advanced Ceramics 2021年第3期10卷 596-613页

作者： Yanan SUN Huimin XIANG Fu-Zhi DAI Xiaohui WANG Yan XING Xiaojun ZHAO Yanchun ZHOU School of Materials Science and Engineering Central South UniversityChangsha 410083China Science and Technology on Advanced Functional Composite Laboratory Aerospace Research Institute of Materials&Processing TechnologyBeijing 100076China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China New Energy Technology Engineering Laboratory of Jiangsu Province Nanjing University of Posts and TelecommunicationsNanjing 210023China

Y_(2)O_(3) is regarded as one of the potential environmental barrier coating(EBC)materials for Al_(2)O_(3)f/Al_(2)O_(3)ceramic matrix composites owing to its high melting point and close thermal expansion coefficient to Al_(2)O_(3).However,the relatively high thermal conductivity and unsatisfactory calcium-magnesium-aluminosilicate(CMAS)resistance are the main obstacles for the practical application of Y_(2)O_(3).In order to reduce the thermal conductivity and increase the CMAS resistance,four cubic bixbyite structured high-entropy oxides RE_(2)O_(3),including(Eu_(0.2)Er_(0.2)Lu_(0.2)Y_(0.2)Yb_(0.2))2O_(3),(Sm_(0.2)Er_(0.2)Lu_(0.2)Y_(0.2)Yb_(0.2))2O_(3),(Sm_(0.2)Eu_(0.2)Er_(0.2)Y_(0.2)Yb_(0.2))2O_(3),and(Sm_(0.2)Eu_(0.2)Lu_(0.2)Y_(0.2)Yb_(0.2))2O_(3)were designed and synthesized,among which(Eu_(0.2)Er_(0.2)Lu_(0.2)Y_(0.2)Yb_(0.2))2O_(3)and(Sm_(0.2)Er_(0.2)Lu_(0.2)Y_(0.2)Yb_(0.2))2O_(3)bulks were prepared by spark plasma sintering(SPS)to investigate their mechanical and thermal properties as well as CMAS *** mechanical properties of(Eu_(0.2)Er_(0.2)Lu_(0.2)Y_(0.2)Yb_(0.2))2O_(3)and(Sm_(0.2)Er_(0.2)Lu_(0.2)Y_(0.2)Yb_(0.2))2O_(3) are close to those of Y_(2)O_(3) but become more brittle than Y_(2)O_(3).The thermal conductivities of(Eu_(0.2)Er_(0.2)Lu_(0.2)Y_(0.2)Yb_(0.2))2O_(3) and(Sm_(0.2)Er_(0.2)Lu_(0.2)Y_(0.2)Yb02)2O_(3)(5.1 and 4.6 W·m^(-1)·K^(-1))are only 23.8%and 21.5%respectively of that of Y_(2)O_(3)(21.4 W·m^(-1)·K^(-1)),while their thermal expansion coefficients are close to those of Y_(2)O_(3) and A12O_(3).Most importantly,HE RE_(2)O_(3) ceramics exhibit good CMAS *** being attacked by CMAS at 1350℃for 4 h,the HE RE_(2)O_(3) ceramics maintain their original morphologies without forming pores or cracks,making them promising as EBC materials for Al_(2)O_(3)f/Al_(2)O_(3) composites.

关键词： high-entropy ceramics rare earth oxides low thermal conductivity thermal expansion coefficient CMAS resistance

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Atomically dispersed indium and cerium sites for selectively electroreduction of CO_(2)to formate

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Nano Research 2023年第7期16卷 8757-8764页

作者： Zhong Liang Lianpeng Song Mingzi Sun Bolong Huang Yaping Du Tianjin Key Lab for Rare Earth Materials and Applications Center for Rare Earth and Inorganic Functional MaterialsHaihe Laboratory of Sustainable Chemical TransformationsSmart Sensing Interdisciplinary Science CenterSchool of Materials Science and EngineeringNational Institute for Advanced MaterialsNankai UniversityTianjin 300350China Department of Applied Biology and Chemical Technology The Hong Kong Polytechnic UniversityHong Kong 999077China

Currently,single-atom combo catalysts(SACCs)for carbon dioxide reduction reaction(CO_(2)RR)to the formation of HCOOH are still very limited,especially the lanthanide-based *** this work,the novel SACCs with atomically dispersed In and Ce active sites were successfully prepared on the nitrogen-doped carbon matrix(InCe/CN).Both aberration-corrected high-angle annular dark-field scanning transmission electron microscopy(AC-HAADF-STEM)images and the extended X-ray absorption fine structure(EXAFS)spectra proved the well-isolated In and Ce *** as-prepared InCe/CN shows a high Faradaic efficiency(FE)(77%)and current density of HCOOH formation(j_(HCOOH))at-1.35 V *** hydrogen electrode(RHE),much higher than the single atom *** calculations have indicated that the introduced Ce single atom sites not only significantly promote electron transfer but also optimize the In-5p orbitals towards higher selectivity towards the HCOOH *** work innovatively extends the design of SACCs towards the main group and Ln metals for more applications.

关键词： single-atom combo catalysts carbon dioxide reduction formate generation multi-active sites rare earth

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P-doped all-small-molecule organic solar cells with power conversion efficiency of 17.73%

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science China Chemistry 2023年第8期66卷 2371-2379页

作者： Wanying Feng Kangqiao Ma Guangkun Song Tianyin Shao Huazhe Liang Shudi Lu Yu Chen Guankui Long Chenxi Li Xiangjian Wan Zhaoyang Yao Bin Kan Yongsheng Chen State Key Laboratory and Institute of Element-Organic Chemistry The Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer MaterialsRenewable Energy Conversion and Storage Center(RECAST)College of ChemistryNankai UniversityTianjin300071China School of Materials Science and Engineering National Institute for Advanced MaterialsNankai UniversityTianjin300350China Beijing Synchrotron Radiation Facility Institute of High Energy PhysicsChinese Academy of SciencesBeijing100043China State Key Laboratory of Luminescent Materials and Devices South China University of TechnologyGuangzhou510640China

All-small organic solar cells(ASM OSCs)inherit the advantages of the distinct merits of small molecules,such as well-defined structures and less batch-to-batch *** comparison with the rapid development of polymer-based OSCs,more efforts are needed to devote to improving the performance of ASM OSCs to close the performance gap between ASM and polymer-based ***,a well-known p-dopant named fluoro-7,7,8,8-tetracyano-p-quinodimethane(FTCNQ)was introduced to a highefficiency system of HD-1:BTP-e C9,and a high power conversion efficiency(PCE)of 17.15%was achieved due to the improved electrical properties as well as better morphology of the active layer,supported by the observed higher fill factor(FF)of 79.45%and suppressed non-radiative recombination ***,combining with the further morphology optimization from solvent additive of 1-iodonaphthalene(IN)in the blend film,the HD-1:BTP-e C9-based device with the synergistic effects of both FTCNQ and IN demonstrates a remarkable PCE of 17.73%(certified as 17.49%),representing the best result of binary ASM OSCs to date.

关键词： organic solar cells all-small-molecule power conversion efficiency p-dopant

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Red-Emissive Organic Room-Temperature Phosphorescence Material for Time-Resolved Luminescence Bioimaging

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CCS Chemistry 2022年第8期4卷 2550-2559页

作者： Wenbo Dai Yahui Zhang Xinghui Wu Shuai Guo Jieran Ma Jianbing Shi Bin Tong Zhengxu Cai Haiyan Xie Yuping Dong Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081 School of Life Science Advanced Research Institute of Multidisciplinary ScienceBeijing Institute of TechnologyBeijing 100081

Organic room-temperature phosphorescence(RTP)materials have been used in high-resolution ***,the development of long-wavelength-emis sion RTP materials in aqueous solution remains a ***,we report red-emissive RTP mate... 详细信息

关键词： red-emissive nanoparticle room-temperature phosphorescence fused-ring molecules dual channel imaging time-resolved luminescence imaging

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The design of phase-modulation silicon all-dielectric coding metasurface in the S-band 2

The design of phase-modulation silicon all-dielectric coding...

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2nd International Conference on Digital Signal and Computer Communications, DSCC 2022

作者： Zhou, Zhenkang Yu, Huijuan Yuan, Xujin Li, Weiduan Beijing Key Laboratory of Lightweight Multi-functional Composite Materials and Structures Institute of Advanced Structure Technology Beijing Institute of Technology Beijing100081 China Beijing Institute of Aerospace Launch Technology Beijing100076 China

ISBN: (纸本)9781510656734

Electromagnetic coding metasurface has become a research hotspot with its modulation capability brought by coding sequence in recent years. In this paper, we achieve the reduction of monostatic Radar Cross section (RCS) by the phase-modulation silicon all-dielectric random coding metasurface. The silicon all-dielectric units are designed and used to compose the 2-bit coding metasurface. To research the influence on scattering by coding sequences, a super unit composed of M×M (M=1,2,3,5) unit cells is taken as the coding element of realizing 2-D coding sequences. The number of -10dB lobes is proposed to measure the communication capacity of metasurface and the scattering entropy is similar index. According to them, it is proved that the coding metasurface consisted by 2×2 super units with random sequence is the best simulation result among four kinds of super unit cells, which can achieve -10dB RCS reduction in a frequency from 3GHz to 5GHz. We envision that our research is expected to be the potential candidates in RCS reduction and information communication. © 2022 SPIE.

关键词： Radar cross section

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Textured Asymmetric Membrane Electrode Assemblies of Piezoelectric Phosphorene and Ti_(3)C_(2)T_(x)MXene Heterostructures for Enhanced Electrochemical Stability and Kinetics in LIBs

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Nano-Micro Letters 2024年第4期16卷 394-414页

作者： Yihui Li Juan Xie Ruofei Wang Shugang Min Zewen Xu Yangjian Ding Pengcheng Su Xingmin Zhang Liyu Wei Jing‑Feng Li Zhaoqiang Chu Jingyu Sun Cheng Huang Volta and DiPole Materials Labs College of EnergySoochow Institute for Energy and Materials InnovationS(SIEMIS)Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu ProvinceKey Laboratory of Core Technology of High Specific Energy Battery and Key Materials for Petroleum and Chemical IndustrySoochow UniversitySuzhou 215006People’s Republic of China School of Materials Science and Engineering Jiangsu UniversityZhenjiang 212013People’s Republic of China College of Underwater Acoustic Engineering Harbin Engineering UniversityHarbin 150001People’s Republic of China Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteShanghai Institute of Applied PhysicsChinese Academy of SciencesShanghai 201204People’s Republic of China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084People’s Republic of China High Density Materials Technology Center for Flexible Hybrid Electronics Suzhou Institute of Electronic Functional Materials TechnologySuzhou Industrial Technology Research InstituteSuzhou 215151People’s Republic of China Institute of Advanced Materials and Institute of Membrane Science and Technology Jiangsu National Synergistic Innovation Center for Advanced MaterialsSuzhou Laboratory and Nanjing Tech UniversityNanjing 211816People’s Republic of China

Black phosphorus with a superior theoretical capacity(2596 mAh g^(-1))and high conductivity is regarded as one of the powerful candidates for lithium-ion battery(LIB)anode materials,whereas the severe volume expansion and sluggish kinetics still impede its applications in *** contrast,the exfoliated two-dimensional phosphorene owns negligible volume variation,and its intrinsic piezoelectricity is considered to be beneficial to the Li-ion transfer kinetics,while its positive influence has not been discussed ***,a phosphorene/MXene heterostructure-textured nanopiezocomposite is proposed with even phosphorene distribution and enhanced piezo-electrochemical coupling as an applicable free-standing asymmetric membrane electrode beyond the skin effect for enhanced Li-ion *** experimental and simulation analysis reveals that the embedded phosphorene nanosheets not only provide abundant active sites for Li-ions,but also endow the nanocomposite with favorable piezoelectricity,thus promoting the Li-ion transfer kinetics by generating the piezoelectric field serving as an extra *** waltzing with the MXene framework,the optimized electrode exhibits enhanced kinetics and stability,achieving stable cycling performances for 1,000 cycles at 2 A g^(-1),and delivering a high reversible capacity of 524 m Ah g^(-1)at-20℃,indicating the positive influence of the structural merits of self-assembled nanopiezocomposites on promoting stability and kinetics.

关键词： Phosphorene Nanopiezocomposite Piezo-electrochemical coupling Membrane electrode assembly Lithium-ion storage

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