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Understand the Temperature Sensing Behavior of Solid-state Polymerized PEDOT Hybrid Based on X-ray Scattering Studies

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Chinese Journal of Polymer Science 2024年第1期42卷 105-112,I0010页

作者： Zhen-Hang He guang-Feng liu Ze-Kun zhou Zhen liu Yi-Shu Zeng Peng Zhang School of Materials Science and Engineering Key Laboratory for Polymeric Composite and Functional Materials of Ministry of EducationSun Yat-sen UniversityGuangzhou 510275China Shanghai Advanced Research Institute(Zhangjiang Laboratory) Chinese Academy of SciencesShanghai 201204China

Poly(3,4-ethylenedioxythiophene)(PEDOT) is one of the most successful conductive polymers that recently has been used in wearable sensors for human health monitoring. In this work, we prepared a series of PEDOT hybrids consisting of PEDOT, sodium poly(styrene sulfonate)(PSSNa) and polyethylene oxide(PEO), and their preparation could be scaled-up via an adapted solid-state polymerization process. The resistance of the as-prepared PEDOT:PSS/PEO hybrid shows clear temperature response, i.e., it decreases almost linearly with the temperature increase. To understand this phenomenon, the in situ synchrotron radiation wide-and small-angle X-ray scattering(WAXS/SAXS) characterizations were undertaken to study the temperature-dependent microstructure change of the PEDOT:PSS/PEO hybrid. It demonstrated that PEDOT formed conductive paths in the hybrids, which were not destroyed by the PEO crystallization. As temperature increased, the PEO crystals' melting and the accompanying reorganization of PEDOT chains endowed the hybrid sample temperature responsiveness. Based on these fundamental knowledges, the hybrid materials were used to fabricate flexible wearable sensor that showing temperature sensing performance with an accuracy of 1 ℃. These findings shed lights on the scalable manufacturing of wearable sensors for body temperature monitoring.

关键词： Solid-state polymerization PEDOT hybrid Structure-property correlation X-ray scattering

Singlet pairing gaps of neutrons and protons in hyperonic neutron stars

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Research in Astronomy and Astrophysics 2015年第5期15卷 725-732页

作者： Yan Xu Cheng-Zhi liu Cun-Bo Fan Xing-Wei Han Xiao-Jun Zhang Ming-Feng Zhu Hong-Yan Wang guang-zhou liu Changchun Observatory National Astronomical Observatories Chinese Academy of Sciences College of Physics Jilin University College of Physics Beihua University

The ^1 S0 nucleonic superfluids are investigated within the relativistic meanfield model and Bardeen-Cooper-Schrieffer theory in hyperonic neutron stars. The ^1 S0 pairing gaps of neutrons and protons are calculated based on the Reid soft-core interaction as the nucleon-nucleon interaction. In particular, we have studied the influence of degrees of freedom for hyperons on the ^1 S0 nucleonic pairing gap in neutron star matter. It is found that the appearance of hyperons has little impact on the baryonic density range and the size of the ^1S0 neutronic pairing gap; the ^1S0 protonic pairing gap also decreases slightly in this region where ρB = 0.0-0.393 fm^-3. However, if baryonic density becomes greater than 0.393 fm^-3, the ^1S0 protonic pairing gap obviously increases. In addition, the possible range for a protonic superfluid is obviously enlarged due to the presence of hyperons. In our results, the hyperons change the 1 So protonic pairing gap, which must change the cooling properties of neutron stars.

关键词： dense matter -- (stars) pulsars general --equation of state

Numerical investigation on compressible flow around a cylinder in proximity to the heated wall

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Journal of Hydrodynamics 2024年第3期36卷 519-533页

作者： Yu-lu liu Jun-wang Qu Yi-zhou Tao Yong-guang Lyu Xiang Qiu Shanghai Institute of Technology School of ScienceShanghai201418China Shanghai Key Laboratory of Mechanics in Energy Engineering Shanghai Institute of Applied Mathematics and MechanicsSchool of Mechanics and Engineering ScienceShanghai UniversityShanghai200072China

In this study,direct numerical simulations were conducted to investigate the compressible flow around a circular cylinder near a heated wall at a Reynolds number(Re)of 500 and a Mach number(Ma)of *** heating ratio T^(*)ranging from 1.0 to 1.6 represents the different situations of a heated wall,whereas the gap ratio ranges from 0.3 to *** study analyzed the impact of heating effect and wall proximity on flow characteristics and aerodynamic *** results indicated that the stability of the flow was enhanced as the gap ratio decreased or the heating ratio *** the calculation of enstrophy,it was found that the strength of shedding vortices weakens with a decrease in gap ratio or an increase in heating ***,the mean drag coefficient decreases as the heating ratio increases or the gap ratio *** contrast,the mean lift coefficient initially decreases and then increases as the gap ratio ***,the drag reduction mechanism was analyzed by examining the pressure distribution on the surface of the cylinder.

关键词： Compressible flow wall proximity heating effect stability enstrophy

Synthesis-temperature-dependent phase composition manipulation toward high thermoelectric performance in tetrahedrites

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Journal of Materials Science & Technology 2024年第1期168卷 124-130页

作者： Yiqing Wei Jiaqi liu Zien Cheng Pengfei Jiang Zizhen zhou Bin Zhang Guoyu Wang guang Han Xu Lu Xiaoyuan zhou Center of Quantum Materials and Devices College of PhysicsChongqing UniversityChongqing 401331China College of Materials Science and Engineering Chongqing UniversityChongqing 400044China College of Chemistry and Chemical Engineering Chongqing UniversityChongqing 401331China Analytical and Testing Center Chongqing UniversityChongqing 401331China

Tetrahedrite,an Earth-abundant natural mineral,has attracted extensive research interest because of its excellent thermoelectric ***,tetrahedrite samples comprising Cu-poor Cu_(12)Sb_(4)S_(13)and Cu-rich Cu_(14)Sb_(4)S_(13)phases have been synthesized using a colloidal method,in which the ratio of two phases is manipulated by controlling the synthesis temperature to improve the thermoelectric *** is found that an ultralow total thermal conductivity of∼0.3 W m^(−1)K^(−1)at 723 K is realized in the sample with a Cu-rich phase fraction of∼50%,which can be attributed to maximized phonon scattering by phase *** a result,combined with a decent power factor,this sample obtains an optimal zT of 1.15,which is about 85%higher than that of the sample with a Cu-rich phase fraction of∼64%and comparable to zT values of other eco-friendly,abundant Cu-based thermoelectric *** work demonstrates an effective synthesis-temperature-dependent phase composition manipulation strategy toward enhanced thermoelectric performance in tetrahedrites.

关键词： Tetrahedrite Thermoelectric Colloidal method Phase manipulation Thermal conductivity

Relativistic Correction on Neutrino Emission from Neutron Stars in Various Parameter Sets

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Communications in Theoretical Physics 2016年第10期65卷 474-478页

作者： Wen-Bo Ding Zhan-Qiang Qi Jia-Wei Hou Geng Mi Tmurbagan Bao Zi Yu guang-zhou liu En-guang Zhao College of Mathematics and Physics Bohai University Jinzhou 121000 China College of Chemistry Chemical Engineering and Food Safety Bohai University Jinzhou 121000 China College of Physics And Electronic Information Inner Mongolia University For The Nationalities Tongliao 028043 China College of Science Nanjing Forestry University Nanjing 210037 China Center for Theoretical Physics Jilin University Changchun 130023 China 6Institute of Theoretical Physics Chinese Academy of Sciences Beijing 100190 China

In the relativistic mean field theory and cooling theories,relativistic correction on neutrino emission from neutron stars in four typical nuclear parameter sets,GM1,GL85,GPS250 and GPS300 is *** show that relativistic effect makes the neutrino emissivity,neutrino luminosity and cooling rate lower,compared with the nonrelativistic *** the influence of relativistic effect grows with the mass of the neutron ***300 set leads to the biggest fall in neutrino emissivity,whereas GM1 set leads to the largest disparity in cooling rate caused by relativistic effect.

关键词： neutron star neutrino emission relativistic correction parameter set

Direct Urca processes involving hyperons in neutron star matter

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Chinese Science Bulletin 2014年第3期59卷 273-278页

作者： Yan Xu guang-zhou liu Cheng-Zhi liu Cun-Bo Fan Xing-Wei Han Xiao-Jun Zhang Hong-Yan Wang Ming-Feng Zhu Yu Meng Changchun Observatory National Astroomical ObservatoriesChinese Academy of Sciences Center for Theoretical Physics Jilin University College of Physics Beihua University College of Optical and Electronical Information Changchun University of Science and Technology

The presence of the isovector scalar interaction in neutron star matter is considered by exchangingδmeson;we study the effects ofδmesons on the direct Urca processes involving *** calculation is based on the framework of the relativistic mean field *** our analysis,the hyperon direct Urca processes under beta equilibrium are open at lower densities due toδmesons,which create a larger energy gap between two baryons in the ***δmeson leads to an obvious enhancement of the neutrino emissivity for the hyperon direct Urca *** particular,the relativistic neutrino emissivity is found to be substantially larger than predicted in the nonrelativistic approach whetherδmesons appear in an neutron star or *** our results,δmesons not only change the baryons properties,but also result in more rapid cooling rate of neutron stars by hyperon direct Urca processes.

关键词：中子星物质超子相对论平均场理论同位旋矢量相互作用非相对论中微子发射率

Counterion-Mediated Hydrogen Bonding Making Strong Polyelectrolytes pH-Responsive:Current Understanding and Perspectives

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Chinese Journal of Polymer Science 2024年第9期42卷 1270-1277,I0005页

作者： Yue Huang guang-Tao Mei Zan Hua guang-Ming liu Hefei National Research Center for Physical Sciences at the Microscale Department of Chemical PhysicsKey Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education InstitutesUniversity of Science and Technology of ChinaHefei230026China The Key Laboratory of Functional Molecular Solids Ministry of Educationand Department of Materials ChemistrySchool of Chemistry and Materials ScienceAnhui Normal UniversityWuhu214002China

The counterion-mediated hydrogen bonding(CMHB)is related to the hydrogen bonding between bound counterions and polyelectrolyte chains in polyelectrolyte systems,where the counterions can both electrostatically bind to the charged groups of polyelectrolyte chains and act as hydrogen bond donors or acceptors to form hydrogen bonds with the hydrogen bond sites associated with polyelectrolyte chains simultaneously.A large number of literatures illustrate that strong polyelectrolytes(SPs)are insensitive to pH,which severely limmits the applications of SPs as smart ***,our studies have demonstrated that the CMHB makes SPs *** perspective discusses the mechanism of pH responsiveness of SPs and the pH-tunable properties of SPs,based on the pH-controlled CMHB *** future research directions on the pH responsiveness of SPs are also discussed *** is anticipated that the study of the pH responsiveness of SPs not only will provide a new understanding of the fundamental properties of SPs,but also will greatly expand the applications of SPs in the field of smart materials.

关键词： Counterion binding Hydrogen bond Polyelectrolyte brush Polyelectrolyte complexation

Characterization of serum proteomic and inflammatory profiling at early stage of iron deficiency in weaned piglets

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Animal Nutrition 2024年第3期18卷 380-389页

作者： guang liu Lan Li Shuan liu Zhenglin Dong Jian zhou Chengyan Gong Yulong Yin Wenjie Tang Dan Wan Laboratory of Animal Nutritional Physiology and Metabolic Process Key Laboratory of Agro-Ecological Processes in Subtropical RegionInstitute of Subtropical AgricultureChinese Academy of SciencesChangsha 410125China Hubei Hongshan Laboratory College of Animal Science and TechnologyHuazhong Agricultural UniversityWuhan 430070China Beijing Dabeinong Technology Group Co. Ltd.Beijing 100080China University of Chinese Academy of Sciences Beijing 101408China Animal Breeding and Genetics Key Laboratory of Sichuan Province Sichuan Animal Science AcademyChengdu 610066China Livestock and Poultry Biological Products Key Laboratory of Sichuan Province Sichuan Animtech Feed Co.Ltd.Chengdu 610066China

The objective of this study was to examine the early serum proteomic and inflammatory profiles of weaned piglets subjected to iron *** healthy piglets(Duroc×Landrace×Large Yorkshire,body weight:4.96±0.05 kg)were weaned at 21 days of ***,these animals were randomly allocated to one of two groups,with six replicates in each group(maintaining a male-to-female ratio of 1:1),the control group(administered 100 mg/kg Fe as FeSO_(4)·H_(2)O)and L-Fe group(no additional Fe supplementation).The results showed that 42 days after initiating,compared with control group,routine blood analysis revealed a reduction in serum iron content,red blood cell(RBC)count,hemoglobin(HGB)content,hematocrit(HCT),and mean corpuscular volume(MCV)(P 0.05).During the early stages of iron deficiency,piglets exhibited increased villus height(VH)and the ratio of VH to crypt depth(CD)in the duodenum(P<0.05)and increased expression levels of iron transporters,including duodenal cytochrome(Cybrd),divalent metal transport 1(DMT1),and ferritin light chain(FTL)(P<0.05).Subsequently,isobaric tags for relative and absolute quantitation(iTRAQ)were used to identify serum *** Ontology(GO)analysis of the differentially abundant proteins(DAP)revealed that 24 of the 30 DAP were involved in platelet function,immune response,cellular metabolism,transcription,and protein ***,prothrombin,asporin(ASPN),and Rac family small GTPase 3(RAC3)expression was induced,whereas glycoprotein Ib platelet subunit alpha(GPIbA)expression was *** was accompanied by a substantial reduction in serum complement 3(C3)and complement 4(C4)contents(P<0.05),with elevated the contents of interleukin-1β(IL-1β),interleukin-4(IL-4),interleukin-6(IL-6),transforming growth factor-β1(TGF-β1),and tumor necrosis factor-α(TNF-α)(P<0.05).Our findings underscore the essential role of dietary iron supplementation in maintaining iron homeostasis and modulating inflammatory responses in piglets.

关键词： Piglet Iron deficiency Proteomics Inflammatory Cytokine Immune response

Derivatives of Intersection Local Time for Two Independent Symmetricα-stable Processes

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Acta Mathematica Sinica,English Series 2024年第5期40卷 1273-1292页

作者： Huan zhou guang Jun SHEN Qian YU Department of Mathematics Anhui Normal UniversityWuhu 241002P.R.China Department of Mathematics Nanjing University of Aeronautics and AstronauticsNanjing 211106P.R.China Key Laboratory of Mathematical Modelling and High Performance Computing of Air Vehicles(NUAA) MIITNanjing 211106P.R.China

In this paper,we consider the derivatives of intersection local time for two independent d-dimensional symmetricα-stable processes X^(α) and X^(α)with respective indices α and α.We first study the sufficient condition for the existence of the derivatives,which makes us obtain the exponential integrability and H?lder *** we show that this condition is also necessary for the existence of derivatives of intersection local time at the ***,we also study the power variation of the derivatives.

关键词： Symmetric stable processes intersection local time exponential integrability power variation