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Chinese Journal of Chemistry 2020年第9期38卷 935-940页

作者： Lan Xie Chen yang Ruimin Zhou zhen Wang Jianqi Zhang kun Lu Zhixiang Wei CAS Key Laboratory of Nanosystem and Hiearchical Fabrication CAS Center for Exelence in NonoscienceNational Center for Nonoscience ond Technology Beijing 100190China University of Chinese Academy of Sciences Bejing 100049China Sino-Danish College University of Chinese Academy of SciencesBeijing 100190China

Summary of main observation and conclusion The ternary blend structure has been demonstrated as an effective approach to increase the power conversion efficiency of organic solar *** effective approach to enhance the power conversion efficiency of ternary solar cells is based on two non-fullerene acceptors with complimentary absorption range and balanced *** this work,we have introduced a high crystallinity small-molecule acceptor,named C8IDTT-4CI with appropriate alkyl side chains into a low crystalline blend of conjugated polymer donor PBDT-TPD and fused-ring electron acceptor ITIC-4F.A ternary device based on the blend PBDT-TPD:1TIC-4F:C81DTT-4CI exhibits a best power conversion efficiency of 9.51%with a simultaneous improvement of the short-circuit current density to 18.76 mA-cm^-2 and the fill factor up to 67.53%.The absorption onset for C8IDTT-4CI is located at 900 nm,so that the well complementary light absorption is beneficial to the *** addition,the existence of high crystallinity C8IDTT-4CI in the ternary device is found helpful to modulate crystallinity,improve heterojunction morphologies and stacking structure,therefore to realize higher charge mobility and better performance.

关键词： ternary absorption acceptor

Different oxidation routes for lattice oxygen recovery of double-perovskite type oxides LaSrFeCoO6 as oxygen carriers for chemical looping steam methane reforming

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Journal of Energy Chemistry 2017年第3期26卷 501-509页

作者： kun Zhao yang Shen zhen Huang Fang He Guoqiang Wei Anqing zheng Haibin Li Zengli Zhao Key Laboratory of Renewable Energy Guangzhou Institute of Energy ConversionChinese Academy of SciencesGuangzhou 510640GuangdongChina Guangdong Key Laboratory of New and Renewable Energy Research and Development Guangzhou Institute of Energy ConversionChinese Academy of SciencesGuangzhou 510640GuangdongChina University of Chinese Academy of Sciences Beijing 100049China

Double-perovskite type oxide LaSrFeCoO（LSFCO） was used as oxygen carrier for chemical looping steam methane reforming（CL-SMR） due to its unique structure and reactivity. Two different oxidation routes,steam-oxidation and steam-air-stepwise-oxidation, were applied to investigate the recovery behaviors of the lattice oxygen in the oxygen carrier. The characterizations of the oxide were determined by X-ray diffraction（XRD）, X-ray photoelectron spectroscopy（XPS）, hydrogen temperature-programmed reduction（H-TPR） and scanning electron microscopy（SEM）. The fresh sample LSFCO exhibits a monocrystalline perovskite structure with cubic symmetry and high crystallinity, except for a little impurity phase due to the antisite defect of Fe/Co disorder. The deconvolution distribution of XPS patterns indicated that Co,and Fe are predominantly in an oxidized state(Feand Fe) and(Coand Co), while O 1s exists at three species of lattice oxygen, chemisorbed oxygen and physical adsorbed oxygen. The double perovskite structure and chemical composition recover to the original state after the steam and air oxidation, while the Co ion cannot incorporate into the double perovskite structure and thus form the CoO just via individual steam oxidation. In comparison to the two different oxidation routes, the sample obtained by steam-oxidation exhibits even higher CHconversion, CO and Hselectivity and stronger hydrogen generation capacity.

关键词： Double-perovskite Chemical looping Lattice oxygen Oxidizing agent Redox

Coherent control of dressed images of four-wave mixing

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Frontiers of physics 2013年第2期8卷 228-235页

作者： zhen-kun Wu Yi-Qi Zhang Tai-kun Liu Zhao-yang Zhang Cheng Li Yan-Peng Zhang Min Xiao Key Laboratory for Physical Electronics and Devices of the Ministry of Education & Shaanxi Key Lab of Information Photonic Technique Xi ' an Jiaotong UniversityChina Xi 'an 710049 Department of Physics University of Arkansas FayettevilleUSA Arkansas 72701 National Laboratory of Solid State Microstructures and Department of Physics Nanjing UniversityChina Nanjing 210093

In two-level as well as V-type three-level atomic systems, we study probe transmission, four-wave mixing （FWM） and fluorescence signals with dressing effect experimentally and theoretically. We find both the hyperfine structure （at the same energy level） and the transition dipole moment （at different energy levels） can affect the dressing effect. We also experimentally investigate that angle- control dynamics in the nonlinear propagation of the images of the probe and generated FWM in two-level atomic systems, and find that the focusing and defocusing of probe beam and FWM signals can be greatly affected by the angles between dressing fields.

关键词： four-wave mixing fluorescence dressing effect Kerr effect

A Photosensitivity Insecticide, 5-Aminolevulinic Acid, Exerts EffectiveToxicity to Oxya chinensis (Orthoptera: Acridoidea)

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Agricultural Sciences in China 2011年第7期10卷 1056-1063页

作者： yang Mei-ling YIN kun GUO Ya-ping MA En-bo ZHANG Jian-zhen Research Institute of Applied Biology Shanxi University Taiyuan 030006 P.R.China Environmental Monitoring of China Beijing 100012 P.R.China School of Life Science and Technology Shanxi University Taiyuan 030006 P.R.China

5-Aminolevulinic acid （ALA）, a major photosensitivity insecticide, has attracted increasing attention as a new type of highly efficient, environmental friendly pesticide to be used to control the pest. To examine whether or not ALA acts effectively to grasshopper, Oxya chinensis and elucidate the detoxification mechanism of ALA, the susceptibility to ALA was assessed in O. chinensis and two major metabolic detoxification enzymes including glutathione S-transferases （GSTs） and general esterases （ESTs）-specific activities were compared in different development stages and different body sections of O. chinensis treated by ALA and the control. The results showed that the ALA exhibited obvious toxicity to the grasshopper in different development stages. In the low-dose treatment （0.0597 mmol L-1）, the mortalities of O. chinensis reached a significant level （55.5% in the 1st instar nymphs, 61.4% in the 2nd instar nymphs, 71.4% in the 3rd instar nymphs, and 64.4% in the 4th instar nymphs. But, there was no dose-dependent toxic effect. Thereby, we proposed that ALA has the potential for acting as photosensitivity insecticide for controlling O. chinensis. GSTs activity assays using CDNB and DCNB as substrates indicated that the thorax and abdomen of the different instar nymphs treated by ALA showed 1.52-5.56 fold significantly increased GSTs activities compared with the control. However, for the ESTs-specific activity assay, there was no significant difference between O. chinensis treated by ALA and the control within different instar nymphs, when a-NA, a-NB and b-NA were used as substrates. Therefore, GSTs-mediated metabolic detoxification as evidenced by significantly increased GSTs activities might contribute to protect against oxidative damage and oxidative stress by ALA in O. chinensis.

关键词： 5-aminolevulinic acid toxicity glutathione S-transferases general esterases Oxya chinensis

Fluorination-substitution effect on all-small-molecule organic solar cells

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Science China Chemistry 2019年第7期62卷 837-844页

作者： Qiong Wu Dan Deng Jianqi Zhang Wenjun Zou yang yang zhen Wang Huan Li Ruimin Zhou kun Lu Zhixiang Wei CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology Beijing 100190 China University of Chinese Academy of Sciences Beijing 100049 China Sino-Danish College University of Chinese Academy of Sciences Beijing 100190 China

Due to the strong crystallinity and anisotropy of small molecules, matched molecular photoelectric properties and morphologies between small molecules and non-fullerene acceptors are especially important in all-small-molecule organic solar cells(OSCs).Introducing fluorine atoms has been proved as an effective strategy to achieve a high device performance through tuning molecular energy levels, absorption and assembly properties. Herein, we designed a novel benzodithiophene-based small molecule donor BDTF-CA with deep highest occupied molecular orbital(HOMO) energy level. All-small-molecule OSCs were fabricated by combing non-fullerene acceptor IDIC with different fluorine-atom numbers. Two or four fluorine atoms were introduced to the end-capped acceptor of IDIC, which are named as IDIC-2 F and IDIC-4 F, respectively. With the increase of fluorination from IDIC to IDIC-4 F, the open circuit voltage(Voc) of the devices decreased, while hole and electron mobilities of the active layers increased by one order of magnitude. Contributed to the most balanced Voc, short-circuit current(Jsc) and fill factor(FF), the device based on BDTF-CA/IDIC-2 F achieved the highest power conversion efficiency of 9.11%.

关键词： organic solar cells all-small-molecule fluorination blend morphology energy levels

Exploiting ultra-large linear elasticity over a wide temperature range in nanocrystalline NiTi alloy

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Journal of Materials Science & Technology 2020年第22期54卷 197-203页

作者： zhen Sun Shijie Hao Genfa Kang yang Ren Junpeng Liu Ying yang Xiangguang Kong Bo Feng Cheng Wang kun Zhao Lishan Cui State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing 102249China Beijing Key Laboratory of Failure Corrosionand Protection of Oil/Gas FacilitiesChina University of Petroleum BeijingBeijing 102249China X-ray Science Division Argonne National LaboratoryArgonneIL 60439USA State Key Laboratory of Nonlinear Mechanics Institute of MechanicsChinese Academy of SciencesBeijing 100190China

Many shape memory alloys can support large recoverable strains of a few percent by reversible stressinduced martensite transformation,yet they behave non-linear within a narrow operating temperature ra *** the bulk metallic materials with ultra-large linear elasticity over a wide tempe rature range has proven to be *** this work,a material design concept was proposed,that is true elastic deformation and reversible twinning-detwinning deformation run in parallel to overcome this challe *** engineering the residual internal stress to realize the concurrency of true elastic deformation and twinning-detwinning deformation,a bulk nanocrystalline NiTi that possesses an ultra-large linear elastic strain up to 5.1 % and a high yield stress of 2.16 GPa over a wide temperature range of 270℃ was *** study offers a new avenue for developing the metallic materials with ultra-large linear elasticity over a wide temperature range of 270℃(from 70℃ to-197℃).

关键词： NiTi Nanocrystalline Linear-elasticity Wide temperature range Twinning

Gold Nanoparticle-based Colorimetric Assay for Determination of Lead(Ⅱ) in Aqueous Media

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Chemical Research in Chinese Universities 2010年第2期26卷 194-197页

作者： LI Xiao-kun WANG zhen-xin State Key Laboratory of Electroanalytical Chemistry Changehun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 R R. China Graduate School of the Chinese Academy ofScienees Beoing 100049 P. R. China

The authors presented a simple colorimetric assay for the detection of toxic heavy metal lead（Ⅱ） ion（Pb2＋） Pentapeptide, cysteine-alanine-leacine-asparagine-asparagine（CALNN）, functionalized gold nanoparticles（GNPs） were aggregated in the presence of the divalent metal ion in solution by an ion-templated chelation process, which caused an easily measurable change in the absorption spectrum of the particles. Typically, mono-dispersing GNPs exhibit an absorption band at 522 nm, corresponding to a red color solution, while aggregated GNPs have it at longer wavelengths, corresponding to a purple or blue color solution. The chelation/aggregation process is reversible via the addition of a strong metal ion chelator such as EDTA. Highly selective and sensitive detection of Pb^2＋ in aqueous solution is thus provided. A detection limit of 0.1 μmol/L of Pb^2＋ was demonstrated.

关键词： Gold nanoparticle Peptide Colorimetric assay Lead(Ⅱ)

Automatic Carrier Landing Control for Unmanned Aerial Vehicles Based on Preview Control

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Transactions of Nanjing University of Aeronautics and Astronautics 2017年第4期34卷 413-419页

作者： zhen Ziyang Ma kun Bhatia Ajeet Kumar College of Automation Engineering Nanjing University of Aeronautics and Astronautics Jiangsu Key Laboratory of Internet of Things and Control Technologies

For carrier-based unmanned aerial vehicles(UAVs),one of the important problems is the design of an automatic carrier landing system(ACLS)that would enable the UAVs to accomplish autolanding on the aircraft ***,due to the movements of the flight deck with six degree-of-freedom,the autolanding becomes *** solve this problem,an accurate and effective ACLS is developed,which is composed of an optimal preview control based flight control system and a Kalman filter based deck motion *** preview control fuses the future information of the reference glide slope to improve landing *** reference glide slope is normally a straight ***,the deck motion will change the position of the ideal landing point,and tracking the ideal straight glide slope may cause landing ***,the predictive deck motion information from the deck motion predictor is used to correct the reference glide slope,which decreases the dispersion around the desired landing ***,simulations are carried out to verify the performance of the designed ACLS based on a nonlinear UAV model.

关键词： carrier-based unmanned aerial vehicles optimal preview control automatic carrier landing system deck motion predictor

A large congenital and solitary intrahepatic arterioportal fistula in an old woman

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World Journal of Gastroenterology 2009年第13期15卷 1656-1659页

作者： zhen-Ya Lu Jian-yang Ao Tian-An Jiang Zhi-Yi Peng Zhan-kun Wang Department of InternalMedicine First Affiliated Hospital Medical College ZhejiangUniversity Hangzhou 310003 Zhejiang Province China Department of Ultrasound First Affiliated Hospital Medical College Zhejiang UniversityHangzhou 310003 Zhejiang Province China Department of Radiology First Affiliated HospitalMedical College Zhejiang University Hangzhou 310003Zhejiang Province China

Arterioportal fistula(APF)is a rare cause of portal hypertension and may lead to *** can be congenital,post-traumatic,iatrogenic(transhepatic intervention or biopsy)or related to ruptured hepatic artery *** APF is a rare condition even in *** this case report,we describe a 73-year-old woman diagnosed as APF by ultrasonography,computed tomography,and hepatic artery selective *** fistula was embolized twice but failed,and she still suffered from alimentary tract ***,selective arteriography of the hepatic artery was performed again and venae coronaria ventriculi and short gastric vein were *** the 2-year follow-up,the patient remained *** therefore argue that embolization of venae coronaria ventriculi and short gastric vein may be an effective treatment modality for intrahepatic APF with severe upper gastrointestinal bleeding.

关键词： Congenital intrahepatic arterioportal fistula Liver Embolization Portal hypertension Angiography

Effect of Electric Field on the Electron-Surface Optical Phonon Scattering Rates in Quantum Wires

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Chinese Physics Letters 1996年第4期13卷 297-300页

作者： CHANG Kai WANG Ruo-zhen MA Ben-kun Department of Physics Beijing Normal UniversityBeijing 100875

By using the variational method and the dielectric continuum model,we investigate the effect of electric Held on the intrasubband scattering rates of electron-surface optical *** results show that the scattering rates tend to increase with the electric field *** scattering rates become significant for wide quantum well wire and sufficiently high fields.

关键词： strength. Electron variational