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Nonvolatile chirality switching in terahertz chalcogenide metasurfaces

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Microsystems & Nanoengineering 2022年第5期8卷 197-205页

作者： Jiaxin Bao Xieyu Chen Kuan Liu Yu Zhan Haiyang Li shoujun Zhang Yihan xu Zhen Tian Tun Cao School of Optoelectronic Engineering and Instrumentation Science Dalian University of TechnologyDalian 116024P.R.China Center for Terahertz waves and College of Precision Instrument and Optoelectronics Engineering Tianjin Universityand the Key Laboratory of Optoelectronics Information and Technology(Ministry of Education)Tianjin 300072P.R.China

Actively controlling the polarization states of terahertz(THz)waves is essential for polarization-sensitive spectroscopy,which has various applications in anisotropy imaging,noncontact Hall measurement,and vibrational circular *** the THz regime,the lack of a polarization modulator hinders the development of this *** theoretically and experimentally demonstrate that conjugated bilayer chiral metamaterials(CMMs)integrated with Ge_(2)Sb_(2)Te_(5)(GST225)active components can achieve nonvolatile and continuously tunable optical activity in the THz region.A THz time-domain spectroscopic system was used to characterize the device,showing a tunable ellipticity(from‒36°to 0°)and rotation of the plane polarization(from 32°to 0°)at approximately 0.73 THz by varying the GST225 state from amorphous(AM)to crystalline(CR).Moreover,a continuously tunable chiroptical response was experimentally observed by partially crystallizing the GST225,which can create intermediate states,having regions of both AM and CR *** that the GST225 has an advantage of nonvolatility over the other active elements and does not require any energy to retain its structural *** work allows the development of THz metadevices capable of actively manipulating the polarization of THz waves and may find applications for dynamically tunable THz circular polarizers and polarization modulators for THz emissions.

关键词： polarization tunable modulator

Thermal-annealing-regulated plasmonic enhanced fluorescence platform enables accurate detection of antigen/antibody against infectious diseases

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Nano Research 2023年第2期16卷 3215-3223页

作者： Ying Yue Jingjie Nan Yuanyuan Che Hongqin xu Weihong Sun Feiran Zhang Lei Wang Wei xu Junqi Niu shoujun Zhu Junhu Zhang Bai Yang State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun 130012China Joint Laboratory of Opto-Functional Theranostics in Medicine and Chemistry The First Hospital of Jilin UniversityChangchun 130021China Department of Laboratory Medicine The First Hospital of Jilin UniversityChangchun 130021China Department of Hepatology Center of Infectious Diseases and Pathogen BiologyThe First Hospital of Jilin UniversityChangchun 130021China

Plasmonic enhanced fluorescence(PEF)technology is a powerful strategy to improve the sensitivity of immunofluorescence microarrays(IFMA),however,current approaches to constructing PEF platforms are either expensive/time-consuming or reliant on specialized ***,we develop a completely alternative approach relying on a two-step protocol that includes the self-assembly of gold nanoparticles(GNPs)at the water–oil interface and subsequent annealing-assisted regulation of gold *** optimized thermal-annealing GNPs(TA-GNP)platform generates adequate hot spots,and thus produces high-density electromagnetic coupling,eventually enabling 240-fold fluorescence enhancement of probed dyes in the near-infrared *** clinical detection of human samples,TA-GNP provides super-high sensitivity and low detection limits for both hepatitis B surface antigen and SARS-CoV-2 binding antibody,coupled with a much-improved detection dynamic range up to six orders of *** fast detection,high sensitivity,and low detection limit,TA-GNP could not only substantially improve the outcomes of IFMA-based precision medicine but also find applications in fields of proteomic research and clinical pathology.

关键词： plasmonic enhanced fluorescence electromagnetic coupling SARS-CoV-2 antibodies hepatitis B surface antigen immunofluorescence microarrays

New Exact Solutions to the Nonlinear Zoomeron Equation with Local Conformable Time-Fractional Derivative

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Journal of Mathematical Research with Applications 2020年第3期40卷 287-296页

作者： Chunlei HE shoujun HUANG Chunping XIA Yangyang xu School of Mathematics and Statistics Anhui Normal University

In this paper, we are concerned with the nonlinear Zoomeron equation with local conformable time-fractional derivative. The concept of local conformable fractional derivative was newly proposed by R. Khalil et al. The bifurcation and phase portrait analysis of traveling wave solutions of the nonlinear Zoomeron equation are investigated. Moreover, by utilizing the exp(-?(ε))-expansion method and the first integral method, we obtained various exact analytical traveling wave solutions to the Zoomeron equation such as solitary wave, breaking wave and periodic wave.

关键词： conformable fractional derivative Zoomeron equation traveling wave solution bifurcation

肥料与密度互作对蒙啤麦5号抗氧化酶活性的影响

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延边大学农学学报 2020年第2期42卷 58-64页

作者：刘志萍王君巴图马宇尚学燕姜晓平沈秋云徐寿军内蒙古农牧业科学研究院作物所内蒙古呼和浩特010000 内蒙古乌海市农牧业机械化服务管理中心内蒙古乌海016000 巴彦淖尔市磴口县农牧业技术推广中心内蒙古巴彦高勒015200 内蒙古民族大学农学院内蒙古通辽028043

运用正交回归试验设计,研究了肥料和密度互作下蒙啤麦5号灌浆期叶片抗氧化酶活性的变化。结果表明:在氮肥64.5~97.5kg/hm^2,磷肥79.05~135.00kg/hm^2,钾肥26.55~60.00kg/hm^2,种植密度458.00~528.00万株/hm^2范围内,增加氮、磷、钾施用... 详细信息

运用正交回归试验设计,研究了肥料和密度互作下蒙啤麦5号灌浆期叶片抗氧化酶活性的变化。结果表明:在氮肥64.5~97.5kg/hm^2,磷肥79.05~135.00kg/hm^2,钾肥26.55~60.00kg/hm^2,种植密度458.00~528.00万株/hm^2范围内,增加氮、磷、钾施用量和种植密度均可提高灌浆期蒙啤麦5号叶片超氧化物歧化酶(SOD)、过氧化物酶(POD)和过氧化氢酶(CAT)活性,超过此范围,则其活性下降。从4个因素的偏回归系数看,其对SOD、POD、CAT活性的影响表现为磷肥>钾肥>氮肥>种植密度,说明灌浆期增施磷肥对蒙啤麦5号抗氧化酶活性的促进作用最明显。在该试验条件下,蒙啤麦5号灌浆期SOD活性最高理论值为241.65U/g,POD活性最高理论值为1077.92U/g·min,CAT活性最高理论值为44.83U/g·min。达到叶片抗氧化酶活性理论最高值的最佳施肥和密度为氮肥(N)102.10~114.30kg/hm^2,磷肥(P2O5)95.27~129.98kg/hm^2,钾肥(K2O)19.52~86.53kg/hm^2,密度447.50~621.93万株/hm^2。

关键词：大麦肥料种植密度抗氧化酶

Heteroatomic Modification of Solid-Waste-Based Mesoporous Carbon for Volatile Organic Compound Adsorption

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China Petroleum Processing & Petrochemical Technology 2023年第1期25卷 66-78页

作者： Liu Jun Li Zhi xu Ke Zhang Xinyang Li Yunpeng Wang Ya Zhang Yongfa Yang Song Liu shoujun Li Junhua College of Chemistry Taiyuan University of TechnologyTaiyuan 030024 State Key Joint Laboratory of Environment Simulation and Pollution Control National Engineering Laboratory for Multi Flue Gas Pollution Control Technology and EquipmentSchool of EnvironmentTsinghua UniversityBeijing 100084 State Key Laboratory of Clean and Efficient Coal Utilization College of Chemical Engineering and TechnologyTaiyuan University of TechnologyTaiyuan 030024 Shandong Pengda Ecological Technology Co. Ltd.ZiboShandong 255420 Taiyuan Green Coke Energy Co. Ltd.Taiyuan 030006

Solid-waste-based activated carbon(AC)was utilized as a carbon source to synthesize a series of carbon-based functional material RAC-X(X=P and S,where P and S denote phosphoric and sulfuric acids,respectively).The toluene adsorption capacities of the regeneration AC(RAC)samples can be significantly improved by adopting the heteroatomic modification ***-P and RAC-S have the same specific surface area(1156 m^(2)/g)and similar porous ***,they have different toluene adsorption capacities,with 316.22 mg/g for RAC-P and 460.12 mg/g for RAC-S,which are 1.6 and 2.4 times greater than that for *** X-ray photoelectron spectroscopy measurements showed that the increase in the amount ofπ–π^(2)chemical bond over the AC surface results in the improvement of the toluene adsorption *** density functional theory results showed that the S-containing functional groups loaded near the defect sites of RAC-S promote toluene ***,reusability tests showed that RAC-S still retains 86%of its adsorption activity after four consecutive adsorption–desorption *** indicates that the heteroatomic modification method affords excellent toluene adsorption performance and recycling practicability,which not only is beneficial for achieving the rational utilization of solid waste resources but also provides a practical method for the efficient elimination of volatile organic compounds.

关键词： waste activated carbon toluene adsorption heteroatomic modification functional groups DFT analysis

Flexible electronics for cardiovascular healthcare monitoring

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The Innovation 2023年第5期4卷 124-138页

作者： Tianqi Zhang Ning Liu Jing xu Zeye Liu Yunlei Zhou Yicheng Yang shoujun Li Yuan Huang Shan Jiang Hangzhou Ins itute of Technology Xidian UniversityHangzhou 311200China Department of Gastrointestinal Surgery Hainan General HospitalHainan ffliated Hospital of Hainan Medical UniversityHaikou 570311China State Key Laboratory of Cardiovascular Disease Fuwai HospitalNational Center for Cardiovascular DiseasesChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100037China Department of Structural Heart Disease National Center for Cardiovascular DiseaseChina&Fuwai HospitalChinese Academy of Medical Sciences&Peking Union Medical CollegeBejing 100037China State Key Laboratory of Cardiovascular Disease Fuwai HospitalNational Center for Cardiovascular DiseasesPediatric Cardiac Surgery CenterFuwai HospitalChinese Academy ofMedical Sciencesand Peking Union Medical CollegeBejing 100037China

Cardiovascular diseases(CVDs)are one of the most urgent threats to humans worldwide,which are responsible for almost one-third of global *** the last decade,research on flexible electronics for monitoring and treatment of CVDs has attracted tremendous *** contrast to conventional medical instruments in hospitals that are usually bulky,hard to move,monofunctional,and time-consuming,flexible electronics are capable of continuous,noninvasive,real-time,and portable *** progress has been made in this emerging field,and thus a number of significant achievements and concomitant research prospects deserve attention for practical ***,we comprehensively review the latest progress of flexible electronics for CVDs,focusing on new functions provided by flexible ***,the characteristics of CVDs and flexible electronics and the foundation of their combination are briefly ***,four representative applications of flexible electronics for CVDs are elaborated:blood pressure(BP)monitoring,electrocardiogram(ECG)monitoring,echocardiogram monitoring,and direct epicardium *** operational principles,progress,merits and demerits,and future efforts are ***,the remaining challenges and opportunities for flexible electronics for cardiovascular healthcare are outlined.

关键词： electronics monitoring consuming

二棱大麦种质资源产量相关性状的遗传多样性分析及综合评价

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内蒙古民族大学学报（自然科学版） 2023年第5期38卷 428-437页

作者：宋俊良李建波刘志萍孙浩毛文跃巴图吕二锁马宇杜慧婷徐寿军内蒙古民族大学农学院内蒙古通辽028043 内蒙古饲用作物工程技术研究中心内蒙古通辽028000 内蒙古自治区农牧业科学院作物育种与栽培研究所内蒙古呼和浩特010000

为筛选综合性状优异的二棱大麦种质,以216份大麦种质资源为试验材料,通过相关分析、主成分分析、聚类分析等方法进行综合评价。结果表明:单株粒质量、单株粒数、分蘖数、主穗长等性状变异系数较高,千粒质量、株高、主穗粒数、主穗粒质... 详细信息

为筛选综合性状优异的二棱大麦种质,以216份大麦种质资源为试验材料,通过相关分析、主成分分析、聚类分析等方法进行综合评价。结果表明:单株粒质量、单株粒数、分蘖数、主穗长等性状变异系数较高,千粒质量、株高、主穗粒数、主穗粒质量等性状变异系数较低,总体变异系数在7.91%~22.04%之间,多样性指数在1.90~2.08之间,千粒质量、穗下节间长、株高等性状遗传多样性较高;相关分析结果表明,多个性状间具有相互作用,主穗长与主穗粒数、主穗粒质量显著正相关,单株穗数与单株粒数、单株粒质量显著正相关,主穗粒质量与单株粒质量显著正相关。基于主成分分析的综合评价和聚类分析,将216份二棱大麦分为4类,第Ⅰ类表现为高秆、穗粒数多,第Ⅱ类高秆、穗长、分蘖力强,第Ⅲ类矮秆、穗粒数、粒质量较低,第Ⅳ类矮秆但穗下节间较长,其余性状较低。

关键词：大麦多样性指数相关分析聚类分析

Biocompatible Chemically Fueled Transient Polymer Nanoparticles for Temporally Programmable in Vivo Imaging

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CCS Chemistry 2023年第3期5卷 669-681页

作者： Chunyu Pan Jiajun xu Liang Wang Yiyang Jia Jiahui Li Guancheng Liu shoujun Zhu Bai Yang Yunfeng Li State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun 130012

Chemically fueled dissipative self-assembly paves the way for innovative materials with lifelike properties and *** of nonequilibrium systems with biocompatibility and biofunctions remains an important and challenging ***,we present biocompatible chemically fueled transient polymer nanoparticles and their applications in temporally programmable in vivo *** lifetime of the transient polymer nanoparticles can be tuned by varying the concentration of polymer,adenosine triphosphate,and ***,the transient assembly of polymer nanoparticles can be paused for storage and then subsequently *** transient polymer nanoparticles exhibit good ***,we implement in vivo imaging in a temporally programmable fashion by using an autonomous fluorescence modulator of transient nanoparticles assembled from polymers with a fluorescence *** results in this work provide a valuable way to achieve nonequilibrium self-assembly of synthetic systems with good biocompatibility and programmable biofunctions,accelerating innovative developments of nonequilibrium soft biomaterials.

关键词： polymer self-assembly nonequilibrium self-assembly polymer nanoparticles biocompatibility programmable bioimaging

Nonvolatile reconfigurable dynamic Janus metasurfaces in the terahertz regime

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Photonics Research 2022年第7期10卷 1731-1743页

作者： shoujun ZHANG XIEYU CHEN KUAN LIU HAIYANG LI YUEHONG xu XIAOHAN JIANG YIHAN xu QINGWEI WANG TUN CAO ZHEN TIAN Center for Terahertz Waves and College of Precision Instrument and Optoelectronics Engineering Key Laboratory of Optoelectronic Information Technology(Ministry of Education of China)Tianjin UniversityTianjin 300072China School of Optoelectronic Engineering and Instrumentation Science Dalian University of TechnologyDalian 116024China Georgia Tech Shenzhen Institute(GTSI) Tianjin UniversityShenzhen 518067China

Metasurfaces,especially tunable ones,have played a major role in controlling the amplitude,phase,and polarization of electromagnetic waves and attracted growing interest,with a view toward a new generation of miniaturized ***,to date,most existing reconfigurable devices are bounded in volatile nature with sustained external energy to maintain and single functionality,which restrict their further ***,we demonstrate for the first time,to our knowledge,nonvolatile,reconfigurable,and dynamic Janus metasurfaces by incorporating phase-change material Ge_(2)Se_(2)Te_(5)(GST)in the terahertz(THz)***,we experimentally show the reversible switching characteristic of GST on large areas by applying a single nanosecond laser pulse,which exhibits excellent contrast of THz properties in both ***,we present a multiplex metasurface *** each metasurface,three sets of structures are adopted,in which two sets integrate *** effective structures can be reversely modulated by the amorphization and crystallization of *** a proof of concept,the dynamic beam splitter,bifocal metalens,dual-mode focusing optical vortex generators,and switchable metalens/focusing optical vortex generators are designed,fabricated,and experimentally characterized,and can be switched reversibly and repeatedly with the help of optical and thermal *** scheme will pave the way toward the development of multifunctional and compact THz devices and may find use for applications in THz imaging,sensing,and communications.

关键词： reconfigurable polarization switched