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The Monitoring of Anisotropic Tracer Nanoparticles by Depolarized Dynamic Light Scattering for Micro-rheology with Improved Contrast and Accuracy 认领 引用 被引量：1
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作者 Bing-Hui Xue Yuan Liu Pan-Chao Yin 《Chinese Journal of Polymer Science》 SCIE EI CAS CSCD 2026年第6期1760-1766,I0013,共7页
Compared to mechanical rheology,micro-rheology(µR)can probe the viscoelasticity of soft matter non-invasively with spatial resolution and broad temporal coverage;however,the measurement quality is undermined by i... Compared to mechanical rheology,micro-rheology(µR)can probe the viscoelasticity of soft matter non-invasively with spatial resolution and broad temporal coverage;however,the measurement quality is undermined by interference from the structural and dynamic inhomogeneity of the tested media.Herein,gold nanorods are dispersed in tested media as tracer particles,and their diffusive dynamics are monitored by depolarized dynamic light scattering for the analysis of the rheological properties of the tested media,as the rotationalranslational dynamics of tracers can be converted to shear modulus via the generalized Stokes-Einstein relation.Because of their strong optical scattering to the laser and the polarization of incident light,the contrast in the dynamics of gold nanorods over the media can be enhanced,rendering the fast and accurate measurement of rheological properties.The method was verified for applications in broad types of substrates,including ergodic systems such as polymer solutions,silica suspensions,non-ergodic gel systems,and biological fluids such as plasma.The critical experimental parameters,for example,tracer size and scattering angle range,are studied for their impact on the measurement quality,and they can be systematically optimized for feasible and practical applications of the developedµR method. 展开更多
关键词 Depolarized dynamic light scattering Micro-rheology Nanorod Gels Rotational dynamics
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Rigid ligand confined rapid synthesis of dual single-atomic sites on carbon black for enhanced oxygen depolarized cathodes 认领 引用 被引量：1
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作者 Chengbin Wang Mengke Li +6 位作者 Ping Li Kaicai Fan Porun Liu Tianrong Zhan Bin Li Lingbo Zong Lei Wang 《Nano Research》 SCIE EI CSCD 2026年第1期206-215,共10页
Oxygen reduction reaction(ORR)is crucial for Znair batteries,while also serves as a core electrochemical process in oxygen depolarized cathodes(ODCs)for chlor-alkali electrolysis.The lack of cost-effective,highly acti... Oxygen reduction reaction(ORR)is crucial for Znair batteries,while also serves as a core electrochemical process in oxygen depolarized cathodes(ODCs)for chlor-alkali electrolysis.The lack of cost-effective,highly active ORR electrocatalysts with superior kinetics hinders progress in this field.Herein,we report the Fe/Ni dual single-atomic sites anchored by commercial carbon black(Fe/Ni-N/CB)using rigid ligand confined and high-temperature shock(HTS)strategy in less than 0.5 s.Theoretical calculation reveals that singleatomic Fe is the real active site.Single-atomic Fe and Ni species in Fe/Ni-N/CB synergistically accelerate the kinetics of ORR by reducing the energy barrier of the rate-determining step.A large half-wave potential(E1/2)of 0.907 V is achieved in 0.1 M KOH aqueous solution.The assembled aqueous Zn-air battery(A-ZAB)with Fe/Ni-N/CB cathode presents remarkable charge-discharge cycling stability for over 650 h without voltage gap degradation.The quasi-solid-state Zn-air battery(QSS-ZAB)exhibits excellent reversibility over a 150-h operation at 0.5 mA·cm-2 with negligible energy conversion efficiency recession.Impressively,Fe/Ni-N/CB||RuO2chloralkali flow cell exhibits a low cell voltage of 1.60 V at a large current density of 300 mA·cm-2 at 80℃,and demonstrates exceptional durability with 7% current density decay over 150 h of continuous operation at 100 mA·cm-2.Fe/Ni-N/CB||RuO2achieves near-ideal caustic current efficiency(~97.2%)at the current density of 300 mA·cm-2.This work provides a rapid and economical synthesis technique for the synthesis of catalysts at the atomic scale while demonstrating significant potential for application in energy-saving chlor-alkali electrolyzer. 展开更多
关键词 rigid ligand high-temperature shock dual single-atomic sites oxygen depolarized cathode chlor-alkali electrolysis Zn-air battery
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Ultrathin van der Waals ferroelectric oxides for scalable low-power memory 认领 引用
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作者 Xiaokun Qin Bowen Zhong +1 位作者 Zheng Lou Lili Wang 《Journal of Semiconductors》 EI CAS CSCD 2026年第4期9-12,共4页
With the continuous scaling of ferroelectric memories to below 5 nm,material and integration challenges that were previously manageable are now becoming increasingly prominent[1].At atomic thicknesses,conventional fer... With the continuous scaling of ferroelectric memories to below 5 nm,material and integration challenges that were previously manageable are now becoming increasingly prominent[1].At atomic thicknesses,conventional ferroelectric oxides suffer from depolarization fields,interfacial charge trapping and structural non-uniformity,leading to rapid performance degradation and poor device-to-device consistency[2].These issues have become a critical bottleneck for ferroelectric field-effect transistors(FeFETs),which are widely regarded as promising building blocks for low-power embedded non-volatile memory and computing-in-memory architectures[3-5]. 展开更多
关键词 depolarization fields scalable low power memory ferroelectric memories depolarization fieldsinterfacial charge trapping ferroelectric oxides ultrathin integration challenges van der waals
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Enhanced characterization of depolarizing samples using indices of polarization purity and polarizance–reflection–transformation spaces 认领 引用 被引量：2
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作者 Dekui Li Ivan Montes +5 位作者 Mónica Canabal-Carbia Irene Estévez Octavi Lopez-Coronado Zhongyi Guo Juan Campos Ángel Lizana 《Advanced Photonics Nexus》 CSCD 2025年第1期77-92,共16页
Depolarizing behavior is commonly observed in most natural samples.For this reason,optical tools measuring the differences in depolarization response among spatially separated structures are highly useful in a wide ra... Depolarizing behavior is commonly observed in most natural samples.For this reason,optical tools measuring the differences in depolarization response among spatially separated structures are highly useful in a wide range of imaging applications for enhanced visualization of structures,target identification,etc.One commonly used tool for depolarizing discrimination is the so-called depolarizing spaces.In this article,we exploit the combined use of two depolarizing spaces,the indices of polarization purity(IPP)and polarizance–reflection–transformation(PRT)spaces,to improve the capability of optical systems to identify polarization–anisotropy depolarizers.The potential of these spaces to discriminate among different depolarizers is first studied from a series of simulations by incoherently adding diattenuations or retarders,with some control parameters emulating samples in nature.The simulated results demonstrate that the proposed methods are capable of increasing differences among depolarizers beyond other well-known techniques.Experimentally,validation is provided by conducting diverse phantom experiments of easy interpretation and mimicking the stated simulations.As a useful application of our approach,we developed a model able to retrieve intrinsic microscopic information of samples from macroscopic polarimetric measurements.The proposed methods enable non-invasive,straightforward,macroscopic characterization of depolarizing samples,and may be of interest for enhanced visualization of samples in multiple imaging scenarios. 展开更多
关键词 depolarizer retarder diattenuator polarization space.
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Phase waves of local depolarization in biological tissues object speckle fields.Fundamental and applied aspects 认领 引用
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作者 Yurii Ushenko Alexander Ushenko +9 位作者 Alexander Dubolazov Mykhaylo Gorsky Irina Soltys Olexandra Litvinenko Victor Bachinsky Ivan Mikirin Olexander Salega Ivan Garasim Jun Zheng Lin Bin 《Journal of Innovative Optical Health Sciences》 SCIE EI CSCD 2025年第5期113-133,共21页
Our gosl was to develop and experimentally validate a polarization-interferene method for phsae scanning of laser speckle fields generated by diffuse layers of birefringent biological tissues.This method isolates and ... Our gosl was to develop and experimentally validate a polarization-interferene method for phsae scanning of laser speckle fields generated by diffuse layers of birefringent biological tissues.This method isolates and uses new diagnostic parameters related to the"phsse WAvEs of local depolarization".We combined polarization-interferenæregistration with phase scanning of complex amplitude distributions in diffuse Laser speckle fields to detect phase waves of local depolarization in birefringent fibrillar networks of biological tisue and messure their modulation depth.This eppгоsch led to the discovery of new criteria for differentiating verious necrotic changes in diffuse histological samples of myocardial tisue from decmsed individuals with"ischemic heart disase(IHD)--cute coronary insufficiency(ACT)",even in the presænce of a high level of depolarized bckground.To evaluate the degree of necrotic changes in the optical anisotropy of difuse myocardial Layers,a new quantitative parameter--modulation depth of local depolarization wave fluctustions-has been proposed.Using this approsch,for the first time,differentiation of diffuse myocardial samples from decessed individuals with IHD and ACI was achieved witha very good 90.45%and outstanding aocuracy of 95.2%. 展开更多
关键词 olarization depolarization interference phase scanning optical anisotropy birefringence biological tissue myocardium.
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Direct measurement and optimization of the polarization-dependent modulation depth in super-resolution structured illumination microscopy 认领 引用
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作者 Linbo Wang Simin Li +4 位作者 Xiaohu Chen Xin Jin Jie Zhang Hui Li Gang Wen 《Journal of Innovative Optical Health Sciences》 SCIE EI CSCD 2025年第4期121-131,共11页
Maintaining the s-polarization state of laser beams is important to achieve high modulation depth in a laser-interference-based super-resolution structured illumination microscope(SR-SIM).However,the imperfect optical... Maintaining the s-polarization state of laser beams is important to achieve high modulation depth in a laser-interference-based super-resolution structured illumination microscope(SR-SIM).However,the imperfect optical components can depolarize the laser beams hence degenerating the modulation depth.Here,we first presented a direct measurement method designed to estimate the modulation depth more precisely by shifting illumination patterns with equal phase steps.This measurement method greatly reduces the dependence of modulation depths on the samples,and then developed a polarization optimization method to achieve high modulation depth at all orientations by actively and quantitatively compensating for the additional phase difference using a combination of waveplate and a liquid crystal variable retarder(LCVR).Experimental results demonstrate that our method can achieve illumination patterns with modulation depth higher than 0.94 at three orientations with only one LCVR voltage,which enables isotropic resolution improvement. 展开更多
关键词 Structured illumination microscopy depolarization modulation depth phase compensation
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Mitigating pseudo-depolarization in constant-step rotating Mueller matrix polarimetry:An optimized self-registration method 认领 引用
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作者 Kaisha Deng Nan Zeng +7 位作者 Liangyu Deng Qiaoqi Tang Chunyan Chen Hongtao Li Zhiyan Liu Hui Ma Chao He Honghui He 《Journal of Innovative Optical Health Sciences》 SCIE EI CSCD 2025年第5期57-68,共12页
Asan emerging poserful tool to provide structural informstion af tissue specimens label-freely,Mueller matrix(MM)polarimetry has garnered extensive attention in biomedical studies and pathological diagnois.However,for... Asan emerging poserful tool to provide structural informstion af tissue specimens label-freely,Mueller matrix(MM)polarimetry has garnered extensive attention in biomedical studies and pathological diagnois.However,for the commonly used constant-step rotating MM polarimetricsystem,beam drift induæd by the rotation of polarization eements can lead to distortions in messurement results,severely affect ing MM imaging accuracy.Here,based on our previous study,we prоровe an optimizad self-registration method to mitigate the psæudo-depolarization effects introduced by image artifacts in constant-step rotatin g MM polarimetry.By addresing the prevalent issue of beam drift and image distortions in such polarimetric imaging systems,the effectivenes of the proposed method is experimentally validated using tissue samples.The result.s demonstrate a significant enhanæment in the accuIrsсy of depolarization parameter estimation after applying the optimized self-registration method.Furthermore,the method enhances the coarseness and contrsst of MM-derived parameters images,thereby bolstering their capacity to characterize tissuestructures.The optimized self-registration method proposed in this study can provide an innovstive spproach for quantitative tissue polarimetry bssæd on constant-step ro tating MM messurement,and contribute to the advanæment of polarimetric imaging technology in biomedical applications. 展开更多
关键词 Mueller matrix self-registration depolarization tissue polarization imaging.
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Electrochemical extraction of strontium from molten salts using reactive zincand aluminum electrodes 认领 引用
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作者 Yongcheng Zhang Taiqi Yin +5 位作者 Lei Zhang Xiaochen Zhang Tao Bo Xiaoli Tan Mei Li Wei Han 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2025年第4期892-901,共10页
Herein, the electrochemical behaviors of Sr on inert W electrode and reactive Zn/Al electrodes were systematically investig-ated in LiCl–KCl–SrCl2molten salts at 773 K using various electrochemical methods. The chem... Herein, the electrochemical behaviors of Sr on inert W electrode and reactive Zn/Al electrodes were systematically investig-ated in LiCl–KCl–SrCl2molten salts at 773 K using various electrochemical methods. The chemical reaction potentials of Li and Sr on re-active Zn/Al electrodes were determined. We observed that Sr could be extracted by decreasing the activity of the deposited metal Sr onthe reactive electrode, although the standard reduction potential of Sr(II)/Sr was more negative than that of Li(I)/Li. The electrochemicalextraction products of Sr on reactive Zn and Al electrodes were Zn13Sr and Al4Sr, respectively, with no codeposition of Li observed.Based on the density functional theory calculations, both Zn13Sr and Al4Sr were identified as stable intermetallic compounds with Zn-/Al-rich phases. In LiCl–KCl molten salt containing 3wt% SrCl2, the coulombic efficiency of Sr in the Zn electrode was ~54%. The depolar-ization values for Sr on Zn and Al electrodes were 0.864 and 0.485 V, respectively, exhibiting a stronger chemical interaction between Znand Sr than between Al and Sr. This study suggests that using reactive electrodes can facilitate extraction of Sr accumulated while elec-trorefining molten salts, thereby enabling the purification and reuse of the salt and decreasing the volume of the nuclear waste. 展开更多
关键词 strontium reductive extraction molten salt depolarization effect reactive electrode
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Protective Effects of Hyperpolarizing Cardioplegia with Pinacidil on Myocardium in Rats 认领 引用
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作者 胡志伟 张凯伦 汪文东 《Journal of Huazhong University of Science and Technology(Medical Sciences)》 2002年第1期31-33,共3页
Whether the ATP sensitive potassium channel opener pinacidil can provide myocardial protective effects in prolonged isolated global ischemic rat heart was investigated. On modified isolated rat working heart model, 40... Whether the ATP sensitive potassium channel opener pinacidil can provide myocardial protective effects in prolonged isolated global ischemic rat heart was investigated. On modified isolated rat working heart model, 40 hearts were divided into four groups randomly: Hyperpolarized arrest H K solution containing pinacidil (50 μmol/L) (P1 and P2) and depolarized arrest St. Thomas' solution (S1 and S2) subjected to 15 ℃ hypothermia, 60 min (P1 and S1) or 120 min (P1 and S2) of ischemia and 30 min reperfusion. The experimental indices included cardioplegic efficiency, cardiac function, coronary blood flow, myocardial enzyme release, myocardial water and ATP content. Hyperpolarized arrest provided significantly better recovery of cardiac function than depolarized arrest. Postischemic coronary flow and myocardial ATP content were higher. The arrest time of electro mechanical activities were longer than depolarized arrest. There were no differences among the groups in myocardial water contents. The hyperpolarized arrest solution containing pinacidil can provide a marked myocardial protective effect during prolonged hypothermic myocardial ischemia. 展开更多
关键词 myocardial protection hyperpolarized cardioplegia depolarized cardioplegia pinacidil
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Selective extraction of titanium from Ti-bearing slag via the enhanced depolarization effect of liquid copper cathode 认领 引用 被引量：10
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作者 Zhenghao Pu Handong Jiao +2 位作者 Zhishan Mi Mingyong Wang Shuqiang Jiao 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2020年第3期43-48,共6页
Ti-bearing slag(TiO2>20 wt%)is a valuable titanium secondary resource.The extraction of titanium from the slag is difficult due to the complex composition and structure.Although molten oxide electrolysis is conside... Ti-bearing slag(TiO2>20 wt%)is a valuable titanium secondary resource.The extraction of titanium from the slag is difficult due to the complex composition and structure.Although molten oxide electrolysis is considered as a promising method,silicon will be preferentially electroreduced compared to titanium due to low theoretical decomposition voltage.In this work,a liquid copper cathode is used to selectively extract titanium from molten Al2O3-MgO-CaO-TiO2-SiO2 electrolyte.It is found that comparing to silicon,titanium can be preferentially reduced by one-step electron transfer due to the enhanced depolarization effect on a liquid copper cathode.So,Ti-Cu alloys are firstly obtained from molten Ti-bearing slag,and then Ti-Si alloys are co-electrodeposited in the molten oxide electrolyte with low TiO2 content.It may be ascribed to the larger binding force between titanium and copper than that between silicon and copper.It provides an effective strategy for the separation of titanium from of Ti-bearing slag. 展开更多
关键词 Titanium alloys Molten oxides electrolysis Liquid cathode Selective depolarization
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Cortical spreading depression-induced preconditioning in the brain 认领 引用 被引量：4
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作者 Ping-ping Shen Shuai Hou +6 位作者 Di Ma Ming-ming Zhao Ming-qin Zhu Jing-dian Zhang Liang-shu Feng Li Cui Jia-chun Feng 《Neural Regeneration Research》 SCIE CAS CSCD 2016年第11期1857-1864,共8页
Cortical spreading depression is a technique used to depolarize neurons. During focal or global ischemia, cortical spreading depression-induced preconditioning can enhance tolerance of further injury. However, the und... Cortical spreading depression is a technique used to depolarize neurons. During focal or global ischemia, cortical spreading depression-induced preconditioning can enhance tolerance of further injury. However, the underlying mechanism for this phenomenon remains relatively unclear. To date, numerous issues exist regarding the experimental model used to precondition the brain with cortical spreading depression, such as the administration route, concentration of potassium chloride, induction time, duration of the protection provided by the treatment, the regional distribution of the protective effect, and the types of neurons responsible for the greater tolerance. In this review, we focus on the mechanisms underlying cor- tical spreading depression-induced tolerance in the brain, considering excitatory neurotransmission and metabolism, nitric oxide, genomic reprogramming, inflammation, neurotropic factors, and cellular stress response. Specifically, we clarify the procedures and detailed information regarding cortical spreading depression-induced preconditioning and build a foundation for more comprehensive investigations in the field of neural regeneration and clinical application in the future. 展开更多
关键词 nerve regeneration cortical spreading depression neuronal depolarization ischemic tolerance peri-infarct depolarization excitatory neurotransmission nitric oxide genomic reprogramming inflammation neurotropic factors cellular stress response neural regeneration
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mTORC1 induces plasma membrane depolarization and promotes preosteoblast senescence by regulating the sodium channel Scn1a 认领 引用 被引量：5
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作者 Ajuan Chen Jian Jin +12 位作者 Shasha Cheng Zezheng Liu Cheng Yang Qingjing Chen Wenquan Liang Kai Li Dawei Kang Zhicong Ouyang Chenfeng Yao Xiaochun Bai Qingchu Li Dadi Jin Bin Huang 《Bone Research》 SCIE CAS CSCD 2022年第2期394-408,共15页
Senescence impairs preosteoblast expansion and differentiation into functional osteoblasts,blunts their responses to bone formation-stimulating factors and stimulates their secretion of osteoclast-activating factors.D... Senescence impairs preosteoblast expansion and differentiation into functional osteoblasts,blunts their responses to bone formation-stimulating factors and stimulates their secretion of osteoclast-activating factors.Due to these adverse effects,preosteoblast senescence is a crucial target for the treatment of age-related bone loss;however,the underlying mechanism remains unclear.We found that mTORC1 accelerated preosteoblast senescence in vitro and in a mouse model.Mechanistically,mTORC1 induced a change in the membrane potential from polarization to depolarization,thus promoting cell senescence by increasing Ca2+influx and activating downstream NFAT/ATF3/p53 signaling.We further identified the sodium channel Scn1a as a mediator of membrane depolarization in senescent preosteoblasts.Scn1a expression was found to be positively regulated by mTORC1 upstream of C/EBPα,whereas its permeability to Na+was found to be gated by protein kinase A(PKA)-induced phosphorylation.Prosenescent stresses increased the permeability of Scn1a to Na+by suppressing PKA activity and induced depolarization in preosteoblasts.Together,our findings identify a novel pathway involving mTORC1,Scn1a expression and gating,plasma membrane depolarization,increased Ca2+influx and NFAT/ATF3/p53 signaling in the regulation of preosteoblast senescence.Pharmaceutical studies of the related pathways and agents might lead to novel potential treatments for agerelated bone loss. 展开更多
关键词 depolarization mTORC1 treatment
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Electrochemical behavior and underpotential deposition of Sm on reactive electrodes(Al,Ni,Cu and Zn)in a LiCl-KCl melt 认领 引用 被引量：4
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作者 Tai-qi Yin Lang Chen +7 位作者 Yun Xue Yang-hai Zheng Xue-peng Wang Yong-de Yan Mi-lin Zhang Gui-ling Wang Fan Gao Min Qiu 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2020年第12期1657-1665,共9页
Sm extraction from a LiCl-KCl melt was carried out by forming alloys on various electrodes,including Al,Ni,Cu,and liquid Zn,and the electrochemical behaviors of the resultant metal products were investigated using dif... Sm extraction from a LiCl-KCl melt was carried out by forming alloys on various electrodes,including Al,Ni,Cu,and liquid Zn,and the electrochemical behaviors of the resultant metal products were investigated using different electrochemical techniques.While Sm metal deposition via the conventional two-step reaction process was not noted on the inert electrode,underpotential deposition was observed on the reactive electrodes because of the latter's depolarization effect.The depolarization effects of the reactive electrodes on Sm showed the order Zn>Al>Ni>Cu.Sm-M(M=Al,Ni,Cu,Zn)alloys were deposited by galvanostatic and potentiostatic electrolysis.The products were fully characterized by X-ray diffractometry(XRD)and scanning electron microscopy(SEM)-energy dispersive spectrometry(EDS),and the stability of the obtained M-rich compounds was determined.Finally,the relationship between the electrode potential and type of Sm-M intermetallic compounds formed was assessed on the basis of the observed electrochemical properties and electrodeposits. 展开更多
关键词 electrodeposits depolarization effect reactive electrodes samarium alloys
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Gabapentinoids for the treatment of stroke 认领 引用 被引量：3
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作者 Ying Zhang Chenyu Zhang +3 位作者 Xiaoli Yi Qi Wang Tiejun Zhang Yuwen Li 《Neural Regeneration Research》 SCIE CAS CSCD 2024年第7期1509-1516,共8页
Gabapentinoid drugs(pregabalin and gabapentin) have been successfully used in the treatment of neuro pathic pain and in focal seizure prevention.Recent research has demonstrated their potent activities in modulating n... Gabapentinoid drugs(pregabalin and gabapentin) have been successfully used in the treatment of neuro pathic pain and in focal seizure prevention.Recent research has demonstrated their potent activities in modulating neurotransmitter release in neuronal tissue,oxidative stress,and inflammation,which matches the mechanism of action via voltage-gated calcium channels.In this review,we briefly elaborate on the medicinal history and ligand-binding sites of gabapentinoids.We systematically summarize the preclinical and clinical research on gabapentinoids in stroke,including ischemic stro ke,intracerebral hemorrhage,subarachnoid hemorrhage,seizures after stro ke,cortical spreading depolarization after stroke,pain after stroke,and nerve regeneration after stro ke.This review also discusses the potential to rgets of gabapentinoids in stroke;however,the existing results are still unce rtain regarding the effect of gabapentinoids on stroke and related diseases.Further preclinical and clinical trials are needed to test the therapeutic potential of gabapentinoids in stroke.Therefore,gabapentinoids have both opportunities and challenges in the treatment of stroke. 展开更多
关键词 cortical spreading depolarization gabapentinoid intracerebral hemorrhage pain after stroke stroke subarachnoid hemorrhage
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Enhanced piezoelectric properties and depolarization temperature in textured(Bi0.5Na0.5)TiO3-based ceramics via homoepitaxial templated grain growth 认领 引用 被引量：3
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作者 Yaqing Ma Linjing Liu +6 位作者 Hang Xie Zerui Zhang Qiangwei Kou Rui Lv Bin Yang Yunfei Chang Fei Li 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2024年第9期91-98,共8页
Enhanced piezoelectric response was usually achieved in(Bi0.5 Na0.5)TiO3(BNT)-based ceramics with sacrifice of depolarization temperature Td,seriously limiting their usage range in electromechanical applic... Enhanced piezoelectric response was usually achieved in(Bi0.5 Na0.5)TiO3(BNT)-based ceramics with sacrifice of depolarization temperature Td,seriously limiting their usage range in electromechanical applications.In this work,we propose to explore piezoelectric anisotropy and domain engineering in composition&microstructure-controlled textured ceramics to resolve this issue.[001]c-textured 0.94(Bi0.5 Na0.5)TiO3–0.06BaTiO3(0.94BNT-0.06BT)ceramics with Lotgering factor F001-91% were fabricated through homoepitaxial templated grain growth(TGG)via using 0.94BNT-0.06BT microplatelet templates.The textured samples exhibited more ordered domains with facilitated domain switching behavior,being consistent with saturated high polarization achieved at lower electric fields.Increasing F001 to above 60%enables rapid enhancement of piezoelectric response.Notably,compared to non-textured counterpart,the maximally textured ceramics exhibited-236%enhanced piezoelectric coefficient(d33-302 pC/N)and-280% enhanced piezoelectric voltage coefficient(g33-49.8×10−3Vm/N),together with slightly increased depolarization temperature(Td-106℃).Moreover,those values are approaching or even higher than the single-crystal values.This work not only provides important guidelines for design and synthesis of novel textured ceramics with improved comprehensive electrical properties,but also can expand application fields of BNT-based ceramics. 展开更多
关键词 Lead-free ceramics Templated grain growth Piezoelectric coefficient Depolarization temperature Domain dynamics
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Determination of action potential wavelength restitution in Scn5a^+/- mouse hearts modelling human Brugada syndrome 认领 引用 被引量：2
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作者 Gary Tse Sheung Ting Wong +1 位作者 Vivian Tse Jie Ming Yeo 《Journal of Geriatric Cardiology》 SCIE CAS CSCD 2017年第9期595-596,共2页
Brugada syndrome is a primary electrical disorder of theheart, predisposing affected individuals to potentially lethal,ventricular tachy-arrhythmias. A number of mechanismshave been identified as being important incre... Brugada syndrome is a primary electrical disorder of theheart, predisposing affected individuals to potentially lethal,ventricular tachy-arrhythmias. A number of mechanismshave been identified as being important increasing the riskof these rhythms. Wavelength （γ） restitution has beensuggested to predict the onset of action potential duration（APD） alternans in mouse Scn5a^＋/- hearts modelling Bru-gada syndrome. 展开更多
关键词 Action potential duration Conduction Depolarization Restitution Repolarization Wavelength
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Recent advances in the magnetic reconnection,dipolarization,and auroral processes at giant planets from the perspective of comparative planetology 认领 引用 被引量：2
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作者 ZhongHua Yao RuiLong Guo +5 位作者 Yong Wei Bertrand Bonfond Denis Grodent BinZheng Zhang William R.Dunn ZuYin Pu 《Earth and Planetary Physics》 EI CAS CSCD 2024年第5期659-672,共14页
Magnetic reconnection and dipolarization are crucial processes driving magnetospheric dynamics,including particle energization,mass circulation,and auroral processes,among others.Recent studies have revealed that thes... Magnetic reconnection and dipolarization are crucial processes driving magnetospheric dynamics,including particle energization,mass circulation,and auroral processes,among others.Recent studies have revealed that these processes at Saturn and Jupiter are fundamentally different from the ones at Earth.The reconnection and dipolarization processes are far more important than previously expected in the dayside magnetodisc of Saturn and potentially Jupiter.Dayside magnetodisc reconnection was directly identified by using Cassini measurements(Guo RL et al.,2018b)and was found to be drizzle-like and rotating in the magnetosphere of Saturn(Delamere et al.,2015b;Yao ZH et al.,2017a;Guo RL et al.,2019).Moreover,magnetic dipolarization could also exist at Saturn’s dayside(Yao ZH et al.,2018),which is fundamentally different from the terrestrial situation.These new results significantly improve our understanding of giant planetary magnetospheric dynamics and provide key insights revealing the physics of planetary aurorae.Here,we briefly review these recent advances and their potential implications for future investigations. 展开更多
关键词 magnetosphere magnetic reconnection magnetic depolarization
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The effect of monosaccharides on self-assembly of benzenetricarboxamides 认领 引用
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作者 Jue Wang Wenjing Qi Guosong Chen 《Chinese Chemical Letters》 SCIE CAS CSCD 2019年第3期587-591,共5页
The interaction between monosaccharides exhibits an important role in the assembly of monosaccharide-containing molecules. In this work, three common monosaccharides, glucose, galactose and mannose, are employed to in... The interaction between monosaccharides exhibits an important role in the assembly of monosaccharide-containing molecules. In this work, three common monosaccharides, glucose, galactose and mannose, are employed to investigate the effect of monosaccharide on the self-assembly of benzenetricarboxamide(BTA) core-containing molecules. In the presence of monosaccharides, three benzenetricarboxamide derivatives aggregate into different ordered structures. When alanine linkers are introduced to these molecules between the core and the monosacchride, morphologies of three types of monosaccharide BTAs turned to disordered, meanwhile their structures become similar with the increase of the length of alanine linkers, indicating the disappearance of the monosaccharide effects. 展开更多
关键词 Monosaccharide Self-assembly Benzenetricarboxamide Dynamic light scatting (DLS) Depolarized dynamic light scatting (DDLS)
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Comprehensive optimization of piezoelectric coefficient and depolarization temperature in Mn-doped Bi0.5Na0.5TiO3-Bi0.5K0.5TiO3-BaTiO3lead-free piezoceramics 认领 引用 被引量：1
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作者 Huashan Zheng Enwei Sun +6 位作者 Huajie Luo Xiaoyu Zhang Yixiao Yang Bin Yang Rui Zhang Shantao Zhang Wenwu Cao 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2024年第5期255-263,共9页
Lead-free Bi_(0.5)Na_(0.5)TiO3(BNT)piezoelectric ceramics have the advantages of large coercive fields and high Curie temperatures.But the improvement of piezoelectric coefficient(d 33)is usually accompanied ... Lead-free Bi_(0.5)Na_(0.5)TiO3(BNT)piezoelectric ceramics have the advantages of large coercive fields and high Curie temperatures.But the improvement of piezoelectric coefficient(d 33)is usually accompanied by a huge sacrifice of depolarization temperature(T d).In this work,a well-balanced performance of d 33 and T d is achieved in MnO2-doped 0.79(Bi_(0.5)Na_(0.5)TiO3)-0.14(Bi0.5K0.5TiO3)-0.07BaTiO3ternary ceramics.The in-corporation of 0.25 mol%MnO2enhances the d 33 by more than 40%,while T d remains almost unchanged(i.e.,d 33=181 pC/N,T d=184℃).X-ray diffraction(XRD)shows that an appropriate fraction of the small axis-ratio ferroelectric phase(pseudo-cubic,P c)coexists with the long-range ferroelectric phase(tetrag-onal,T)under this MnO2doping.Piezoelectric force microscopy(PFM)has revealed a special domain configuration,namely large striped and layered macro domains embedded with small nanodomains.This study provides a distinctive avenue to design BNT-based piezoelectric ceramics with high piezoelectric performance and temperature stability. 展开更多
关键词 BNT-BKT-BT ceramics Mn doping Piezoelectric Depolarization temperature Phase structure
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Retrieval of the Single Scattering Albedo of Asian Dust Mixed with Pollutants Using Lidar Observations 认领 引用 被引量：1
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作者 Sungkyun SHIN Young Min NOH +5 位作者 Kwonho LEE Hanlim LEE Detlef MLLER Y.J.KIM Kwanchul KIM Dongho SHIN 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 2014年第6期1417-1426,共10页
The vertical distribution of single scattering albedos （SSAs） of Asian dust mixed with pollutants was derived using the multi-wavelength Raman lidar observation system at Gwangju （35.10°N,126.53°E）.Verti... The vertical distribution of single scattering albedos （SSAs） of Asian dust mixed with pollutants was derived using the multi-wavelength Raman lidar observation system at Gwangju （35.10°N,126.53°E）.Vertical profiles of both backscatter and extinction coefficients for dust and non-dust aerosols were extracted from a mixed Asian dust plume using the depolarization ratio from lidar observations.Vertical profiles of backscatter and extinction coefficients of non-dust particles were input into an inversion algorithm to retrieve the SSAs of non-dust aerosols.Atmospheric aerosol layers at different heights had different light-absorbing characteristics.The SSAs of non-dust particles at each height varied with aerosol type,which was either urban/industrial pollutants from China transported over long distances at high altitude,or regional/local pollutants from the Korean peninsula.Taking advantage of independent profiles of SSAs of non-dust particles,vertical profiles of SSAs of Asian dust mixed with pollutants were estimated for the first time,with a new approach suggested in this study using an empirical determination of the SSA of pure dust.The SSAs of the Asian dust-pollutants mixture within the planetary boundary layer （PBL） were in the range 0.88-0.91,while the values above the PBL were in the range 0.76-0.87,with a very low mean value of 0.76 ± 0.05.The total mixed dust plume SSAs in each aerosol layer were integrated over height for comparison with results from the Aerosol Robotics Network （AERONET） measurements.Values of SSA retrieved from lidar observations of 0.92 ± 0.01 were in good agreement with the results from AERONET measurements. 展开更多
关键词 lidar Asian dust depolarization ratio microphysical properties single scattering albedo
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