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Surface-induced Microstructure and Performance Changes in P3HT Ultrathin Films

Chinese Journal of Polymer Science 2024年第6期42卷 805-814页

作者： Hong-Tao Shan Jia-Xin He Bing-Yan Zhu Xue-Ting Cao Ying-Ying Yan jian-jun zhou Hong Huo Beijing Key Laboratory of Energy Conversion and Storage Materials College of ChemistryBeijing Normal UniversityBeijing100875China

In this work,poly(3-hexylthiophene)(P3HT)ultrathin films(P3HT-T)were prepared by spin-coating a dilute P3HT solution(in a toluene:o-dichlorobenzene(Tol:ODCB)blend with a volume ratio of 80:20)with ultrasonication and the addition of the nucleating agent bicycle[2.2.1]heptane-2,3-dicarboxylic acid disodium salt(HPN-68L)on glass,Si wafers and indium tin oxide(ITO)*** electrical and mechanical properties of the P3HT-T ultrathin films were investigated,and it was found that the conductivity and crack onset strain(COS)were simultaneously improved in comparison with those of the corresponding pristine P3HT film(P3HT-0,without ultrasonication and nucleating agent)on the same substrate,regardless of what substrate was ***,the conductivity of P3HT-T ultrathin films on different substrates was similar(varying from 3.7 S·cm^(-1)to 4.4 S·cm^(-1)),yet the COS increased from 97%to 138%by varying the substrate from a Si wafer to *** grazing-incidence wide-angle X-ray diffraction(GIXRD),UV-visible(UV-Vis)spectroscopy and atomic force microscopy(AFM),we found that the solid order and crystallinity of the P3HT-T ultrathin film on the Si wafer are highest,followed by those on glass,and much lower on ***,the surface energy and roughness of three substrates were investigated,and it was found that the polar component of the surface energyγp plays a critical role in determining the crystalline microstructures of P3HT ultrathin films on different *** work indicates that the P3HT ultrathin film can obviously improve the stretchability and simultaneously retain similar electrical performance when a suitable substrate is *** findings offer a new direction for research on stretchable CP ultrathin films to facilitate future practical applications.

关键词： P3HT ultrathin film Substrate Crystalline microstructures Polar component of the surface energy Electrical and stretchable performances

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CO Clouds around SNR G21.8-0.6 and G32.8-0.1

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Chinese Journal of Astronomy and Astrophysics 2007年第5期7卷 705-711页

作者： jian-jun zhou Xi-Zheng Zhang Hong-Bo Zhang Jarken Esimbek Ju-Yong Zhang Bing-Gang Ju National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 National Astronomical Observatories / Urumqi Observatory Chinese Academy of Sciences Urumqi 830011 Graduate School of Chinese Academy of Sciences Beijing 100049 Qinghai Station of Purple Mountain Observatory Chinese Academy of Sciences Delingha 817000

We made the first CO（1-0） mapping to SNR G21.8-0.6 and SNR G32.8-0.1, both associated with OH 1720MHz maser. Based on the morphological correspondence and velocity and position agreement between the radio remnant an... 详细信息

关键词： ISM clouds -- ISM individual (G21.8-0.6, G32.8-0.1 ) -- ISM molecules -- masers -- supernova remnants

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An H2O Maser survey towards BGPS sources in the Outer Galaxy

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Research in Astronomy and Astrophysics 2016年第6期16卷 29-46页

作者： Hong-Wei Xi jian-jun zhou Jarken Esimbek Gang Wu Yu-Xin He Wei-Guang Ji Xiao-Ke Tang Ye Yuan Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China University of Chinese Academy of Sciences Beijing 100049China Key Laboratory of Radio Astronomy Chinese Academy of SciencesUrumqi 830011China

We performed an H20 maser survey towards 274 Bolocam Galactic Plane Survey （BGPS） sources with 85° 〈 1 〈 193° using the Nanshan 25 m radio telescope. We detected 25 H2O masers, and five of them are new detections. The detection rate of H2O masers in our sample is 9% which is very low. The detection rate of H2O masers increases as the 1.1 mm flux density of BGPS sources increases, and both the peak flux density and luminosity of H2O masers increase as the sources evolve. The detection rate of H2O masers toward BGPS sources without HCO＋ emission is low. The BGPS sources associated with both H2O and CH3OH masers seem to be more compact than those only associated with H2O masers. This indicates that the sources with both masers may be in a relatively later evolutionary stage. The strongest H2O maser source G133.715＋01.217, also well known as W3 IRS 5 which has a flux density of 2.9 × 103 Jy, was detected at eight different nearby positions. By measuring the correlation between the flux densities of these H2O masers and their angular distance from the true source location, we get the influence radius r = 1/0.8 1og（F0/3rms）. For our observations, strong sources can be detected anywhere within this radius. It is helpful to determine whether or not a weak maser nearby the strong maser is a true detection.

关键词： masers -- radio lines: ISM -- stars: formation

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Design of Variable Structure Control by Using the L_2 Gain Method

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International Journal of Plant Engineering and Management 2010年第2期15卷 97-102页

作者： GUO jian-guo zhou jun Institute of Precision Guidance and Control Northwestern Polytechnical University Xi'an 710072 P. R. China

The robust stabilization problem for a family of nonlinear plants with mismatch uncertainties is addressed, and a solution is presented based on variable structure control theory and H∞ control theory. A kind of boundary layer is built near the ideal switch surface which can eliminate chattering in the switch surface. The proposed control method with L2 gain can guarantee exponential stability of a system state with no parameter uncertainty and exter- nal disturbance, while it can guarantee state ultimate boundness if parameter uncertainty and external disturbance exist. In the proposed design method, stability of the closed-loop system is analyzed by adopting the Lyapurtov func- tion approach. Finally the numerical simulation results show that the proposed smooth variable structure controller has good pelformance without chattering in the switch surface.

关键词： variable structure control boundary layer Lyapunov methods stability, nonlinear system

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Influence of fin architectures on linearity characteristics of AlGaN/GaNFinFETs

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Chinese Physics B 2018年第4期27卷 432-436页

作者： Ting-Ting Liu Kai Zhang Guang-Run Zhu jian-jun zhou Yue-Chan Kong Xin-Xin Yu Tang-Sheng Chen Research Institution China Electronic Equipment ＆ System Engineering Company Beijing 100039 China Science and Technology on Monolithic Integrated Circuits and Modules Laboratory Nanjing Electronic Devices Institute Nanjing 210016 China

We investigate the influence of fin architecture on linearity characteristics of AlGaN/*** is found that the Fin FET with scaled fin dimensions exhibits much flatter Gm characteristics than the one with long fins as well as planar *** to the comparative study,we provide direct proof that source resistance rather than tri-gate structure itself dominates the Gm ***,power measurements show that the optimized FinFET is capable of delivering a much higher output power density along with significant improvement in linearity characteristics than conventional planar *** study also highlights the importance of fin design in GaN-based FinFET for microwave power application,especially high-linearity applications.

关键词： AlGaN/GaNFinFETs output power density linearity characteristics

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The OH Maser Line Receiving System for the Urumqi 25m Radio Telescope

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Chinese Journal of Astronomy and Astrophysics 2005年第5期5卷 557-562页

作者： Hong-Bo Zhang Jarken Esimbek jian-jun zhou Xing-Wu Zhen Xi-Zhen Zhang Wen-Jie Yang National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 Urumqi Astronomical Observatory National Astronomical Observatories Chinese Academyof Sciences Urumqi 830011 Department of Astronomy Nanjing University 210093 Beijing Institute of Tracking and Telecommunication Technology Beijing 100094

A maser spectral line system is newly implemented on the Urumqi 25m Radio Telescope. The system consists mainly of a cooling receiver and a 4096 channels digital correlation spectrometer. The frequency resolution of the spectrometer at the maximum signal bandwidth of 80MHz is 19.5kHz. After careful calibrations observation at the 1665 MHz OH maser emission was made towards a number of sources, including W49N and W75N. The observed results demonstrate that the digital correlation spectrometer is suitable for astronomical spectral line observations.

关键词： instrumentation: spectrometer - OH maser

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High performance RE–Fe–B sintered magnets with high-content misch metal by double main phase process

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Chinese Physics B 2020年第10期29卷 494-500页

作者： Yan-Li Liu Qiang Ma Xin Wang jian-jun zhou Tong-Yun Zhao Feng-Xia Hu Ji-Rong Sun Bao-Gen Shen State Key Laboratory of Magnetism Institute of PhysicsChinese Academy of SciencesBeijing 100190China School of Science Inner Mongolia University of Science and TechnologyBaotou 014010China University of Chinese Academy of Sciences Beijing 100049China

Double main phase process is applied to fabricate [(Pr, Nd)1 – xMMx]13.8FebalM1.5B5.9 (x = 0.5 and 0.7;M = Cu, Al, Co, and Nb) sintered magnets with high misch metal (MM) content. In comparison to the magnets by single main phase process, the enhanced magnetic properties have been achieved. For magnets of x = 0.7, Hcj increases to 371.9 kA/m by 60.5%, and (BH)max is significantly enhanced to 253.3 kJ/m3 by 56.9%, compared with those of the single main phase magnets of the same nominal composition. In combination with minor loops and magnetic recoil curves, the property improvement of magnets with double main phase method is well explained. As a result, it is demonstrated that double main phase technology is an effective approach to improve the permanent magnetic properties of MM based sintered magnets.

关键词： misch maetal double main phase process magnetic properties coercivity

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Acute Fornix Deep Brain Stimulation Improves Hippocampal Glucose Metabolism in Aged Mice

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Chinese Medical Journal 2018年第5期131卷 594-599页

作者： Xiu Wang Wen-Hart HU Kai Zhang jun-jian zhou De-Feng Liu Mei-Yu Zhang jian-Guo Zhang Department of Neurosurgery Beijing Tian Tan Hospital Capital Medical University Beijing 100050 China Stereotactic and Functional Neurosurgery Laboratory Beijing Neurosurgical Institute Capital Medical University Beijing 100050 China Beijing Key Laboratory of Neurostimulation Beijing 100050 China Experimental Research Center China Academy of Traditional Chinese Medicine Beijing 100700 China

Background： A beneficial memory effect of acute formix deep brain stimulation （DBS） has been reported in clinical studies. The aim of this study was to investigate the acute changes in glucose metabolism induced by fornix DBS. Methods： First, the Morris water maze test and novel object recognition memory test were used to confirm declined memory in aged mice （C57BL/6, 20-22 months old）. Then, four groups of mice were used as follows： aged mice with stimulation （n = 12）, aged mice with sham-stimulation （n = 8）, adult mice （3-4 months old） with stimulation （n = 12）, and adult mice with sham-stimulation （n = 8）. lpsilateral hippocampal glucose metabolism and glutamate levels were measured in vivo by microdialysis before, during, and after fornix DBS treatment. Histological staining was used to verify the localization of electrodes and mice with inaccurate placement were excluded from subsequent analyses. The effects of fornix DBS on extracellular glucose, lactate, pyruvate, and glutamate levels over time were analyzed by repeated-measures analysis of variance followed by Fisher＇s least significant difference post hoc test. Results： The aged mice had a higher basal lactate/pyruvate ratio （LPR） and lactate/glucose ratio （LGR） than the adult mice （LPR： 0.34 ± 0.04 vs. 0.13 ± 0.02, t = 4.626, P 〈 0.0001 ; LGR： 6.06± 0.59 vs. 4.14 ± 0.36, t = 2.823, P 〈 0.01 ）. Fomix DBS decreased the ipsilateral hippocampal pyruvate and lactate levels （P 〈 0.05）, but the glucose levels were not obviously changed in aged mice. Similarly, the LGR and LPR also decreased in aged mice after fornix DBS treatment （P 〈 0.05）. Glucose metabolism in adult mice was not significantly influenced by tbrnix DBS. In addition, fornix DBS significantly decreased the ipsilateral hippocampal extracellular levels of glutamate in aged mice （P 〈 0.05）, while significant alterations were not found in the adult mice. Conclusions： The present study provides experimental evidence that fornix DBS could significantly

关键词： Deep Brain Stimulation Fornix Glucose Metabolism Memory Decline

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Enhanced interface properties of diamond MOSFETs with Al2O3 gate dielectric deposited via ALD at a high temperature

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Chinese Physics B 2021年第5期30卷 661-666页

作者： Yu Fu Rui-Min Xu Xin-Xin Yu jian-jun zhou Yue-Chan Kong Tang-Sheng Chen Bo Yan Yan-Rong Li Zheng-Qiang Ma Yue-Hang Xu University of Electronic Science and Technology of China Chengdu 611731China Nanjing Electronic Devices Institute Nanjing 210016China Sichuan University Chengdu 610041China University of Wisconsin-Madison MadisonWI 53705USA

The interface state of hydrogen-terminated(C-H)diamond metal-oxide-semiconductor field-effect transistor(MOSFET)is critical for device *** this paper,we investigate the fixed charges and interface trap states in C-H diamond MOSFETs by using different gate dielectric *** devices use Al_(2)O_(3) as gate dielectrics that are deposited via atomic layer deposition(ALD)at 80℃and 300℃,respectively,and their C-V and I-V characteristics are comparatively ***-Schottky plots(1/C2-VG)suggest that positive and negative fixed charges with low density of about 10^(11)cm^(-2) are located in the 80-℃-and 300-℃deposition Al2O3 films,*** analyses of direct current(DC)/pulsed I-V and frequency-dependent conductance show that the shallow interface traps(0.46 eV-0.52 eV and 0.53 eV-0.56 eV above the valence band of diamond for the 80-℃and 300-℃deposition conditions,respectively)with distinct density(7.8×10^(13)eV^(-1)·cm^(-2)-8.5×10^(13)eV^(-1)·cm^(-2) and 2.2×10^(13)eV^(-1)·cm^(-2)-5.1×10^(13)eV^(-1)·cm^(-2) for the 80-℃-and 300-℃-deposition conditions,respectively)are present at the Al2O3/C-H diamond *** pulsed I-V and capacitance dispersion results indicate that the ALD Al_(2)O_(3) technique with 300-℃deposition temperature has higher stability for C-H diamond MOSFETs.

关键词： diamond MOSFET ALD temperature pulsed I-V interface trap conductance method

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CONTROLLING LAMELLAR ORIENTATION TO PREPARE LITHIUM BATTERY SEPARATOR

CONTROLLING LAMELLAR ORIENTATION TO PREPARE LITHIUM BATTERY ...

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2012年全国高分子材料科学与工程研讨会

作者： jian jun zhou,Lin LI College of Chemistry,Beijing Normal University,Beijing,P.R.China

During the fabrication of lithium battery separator,the controlling the lamellar orientation in the polymer film is very ***,we use the poly（ethylene oxide）（PEO） single crystal as a model system to study the influence of substrates on the lamellar *** recrystallization behavior of PEO on four amorphous substrates,including poly（vinyl alcohol）（PVA）,lysozyme（LYSO）,poly（vinylpyrrolidone）（PVPY） and poly（acrylic acid）（PAA） thin films, was investigated using atomic force microscopy（AFM） and transmission electron microscopy （TEM）.The obtained results show that both the degree of supercooling and PEO/substrate interactions have had pronounced influence on the growth habit of the PEO crystals.A thermodynamic model has been proposed accordingly,in which the lamellar orientation is associated with the favorite primary *** predict the dependence of the lamellar orientation on the degree of supercooling and the surface free energy of *** transition of lamellar orientation from edge-on to flat-on is determined by a critical surface free energy of the substrate which is equal to the surface tension of the polymer melt,and decreases with temperature.

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