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Electrochemical Deposition of a Single-Crystalline Nanorod Polycyclic Aromatic Hydrocarbon Film with Efficient Charge and Exciton Transport

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Angewandte Chemie 2021年第13期134卷

作者： Dr. Cheng Zeng Dr. Wenhao Zheng Prof. Dr. Hong Xu Dr. Silvio Osella Dr. Wei Ma Dr. Hai I. Wang Dr. Zijie Qiu Dr. Ken-ichi Otake Prof. Dr. Wencai Ren Prof. Dr. Huiming Cheng Prof. Dr. Klaus Müllen Prof. Dr. Mischa Bonn Prof. Dr. Cheng Gu Prof. Dr. Yuguang Ma State Key Laboratory of Luminescent Materials and Devices Institute of Polymer Optoelectronic Materials and Devices South China University of Technology Guangzhou 510640 P. R. China Max Planck Institute for Polymer Research Ackermannweg 10 55122 Mainz Germany Institute of Nuclear and New Energy Technology Tsinghua University Beijing 100084 P. R. China Chemical and Biological Systems Simulation Lab Center of New Technologies University of Warsaw Banacha 2C 02-097 Warsaw Poland Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 P. R. China Institute for Integrated Cell-Material Sciences Institute for Advanced Study Kyoto University Kyoto 606-8501 Japan Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates South China University of Technology Guangzhou 510640 P. R. China

Electrochemical deposition has emerged as an efficient technique for preparing conjugated polymer films on electrodes. However, this method encounters difficulties in synthesizing crystalline products and controlling their orientation on electrodes. Here we report electrochemical film deposition of a large polycyclic aromatic hydrocarbon. The film is composed of single-crystalline nanorods, in which the molecules adopt a cofacial stacking arrangement along the π–π direction. Film thickness and crystal size can be controlled by electrochemical conditions such as scan rate and electrolyte species, while the choice of anode material determines crystal orientation. The film supports exceptionally efficient migration of both free carriers and excitons: the free carrier mobility reaches over 30 cm 2 V −1 s −1 , whereas the excitons are delocalized with a low binding energy of 118.5 meV and a remarkable exciton diffusion length of 45 nm.

关键词： carrier and exciton migration electrochemical deposition organic single crystal orientation control thin films

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Effect of thermal-cycling on the piezoelectricity of 0.5Ba(Zr 0.2 Ti 0.8 )O 3 -0.5(Ba 0.7 Ca 0.3 )TiO 3 Pb-free piezoceramic

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Journal of Alloys and Compounds 2020年 847卷

作者： Yanshuang Hao Chang Liu Liqiang He Yuanchao Ji Luo Zhao Jinghui Gao Shuai Ren Mengyao Guo Zhufeng Hou Bo Da Xiaobing Ren Frontier Institute of Science and Technology And State Key Laboratory for Mechanical Behaviour of Materials And MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter Xi’an Jiaotong University Xi’an 710049 China Center for Functional Materials National Institute for Materials Science Tsukuba 305-0047 Ibaraki Japan State Key Laboratory of Electrical Insulation and Power Equipment Xi’an Jiaotong University Xi’an 710049 China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou 350002 China Research and Services Division of Materials Data and Integrated System National Institute for Materials Science Tsukuba 305-0044 Ibaraki Japan

The reliability of piezoelectricity under thermal-cycling is an important consideration for the practical application of Pb-free piezoelectric materials. In this paper, we investigated the effect of thermal-cycling on the piezoelectricity of 0.5Ba(Zr 0.2 Ti 0.8 )O 3 -0.5(Ba 0.7 Ca 0.3 )TiO 3 (BZT-BCT) Pb-free piezoceramic. The results show that, in BZT-BCT, the tetragonal-orthorhombic (T-O) transition causes a strong piezoelectricity degradation (∼40% reduction after 60 thermal cycles between −40 °C and 50 °C), whereas the orthorhombic-rhombohedral (O-R) transition only leads to negligible degradation during the thermal-cycling test, indicating a weak depoling effect. The comparative studies made between BZT-BCT and BaTiO 3 (BT) reveal that the weak depoling effect results from the diffuseness of the O-R transition in BZT-BCT and weak domain pattern change across the transition. Our work implies that Pb-free piezoelectrics with good thermal-cycling stability can be achieved through engineering the normal ferroelectric-to-ferroelectric transition to a diffused one, which may help to design new Pb-free piezoelectric materials with good thermal-cycling stability.

关键词： Thermal cycling Phase transition Pb-free Diffuse phase transition

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Photodetectors: Ultrahigh Stability 3D TI Bi2Se3/MoO3Thin Film Heterojunction Infrared Photodetector at Optical Communication Waveband (Adv. Funct. Mater. 12/2020)

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Advanced Functional Materials 2020年第12期30卷

作者： Ming Yang Qi Han Xianchao Liu Jiayue Han Yafei Zhao Liang He Jun Gou Zhiming Wu Xinran Wang Jun Wang School of Optoelectronic Science and Engineering University of Electronic Science and Technology of China Chengdu 610054 P. R. China National Laboratory of Solid State Microstructures School of Electronic Science and Engineering Nanjing 210093 P. R. China Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing 210093 P. R. China State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of China Chengdu 610054 P. R. China

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Corrigendum to "Di-(2-ethylhexyl)-phthalate induces apoptosis via the PPARγ/PTEN/AKT pathway in differentiated human embryonic stem cells" [Food. Chem. Toxicol. 131 (2019)]

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Food and chemical toxicology : an international journal published for the British Industrial Biological Research Association 2021年 154卷 112371页

作者： Haiqin Fang Weiting Fang Hanwen Cao Sha Luo Jingdong Cong Sana Liu Feng Pan Xudong Jia China National Center for Food Safety Risk Assessment Beijing 100021 China The Key Laboratory of Environmental Pollution Monitoring and Disease Control Ministry of Education Guizhou Medical University Guiyang 550025 China. Electronic address: fanghaiqin@***. Affiliated Provincial Hospital of Anhui Medical University & the First Affiliated Hospital of USTC Division of Life Sciences and Medicine University of Science and Technology of China. Anhui 230001 China. China National Center for Food Safety Risk Assessment Beijing 100021 China. Institute of Non-Communicable Diseases Control and Prevention Tianjin Centers for Disease Control and Prevention Tianjin 300011 China. Ziguang Experimental School WEH Shandong 264411 China.

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Ready for O4 II: GRANDMA Observations of Swift GRBs during eight-weeks of Spring 2022

arXiv

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arXiv 2023年

作者： Tosta e Melo, I. Ducoin, J.-G. Vidadi, Z. Andrade, C. Rupchandani, V. Agayeva, S. Abdelhadi, J. Abe, L. Aguerre-Chariol, O. Aivazyan, V. Alishov, S. Antier, S. Bai, J.-M. Baransky, A. Bednarz, S. Bendjoya, Ph. Benkhaldoun, Z. Beradze, S. Bizouard, M.A. Bhardwaj, U. Blazek, M. Boër, M. Broens, E. Burkhonov, O. Christensen, N. Cooke, J. Corradi, W. Coughlin, M.W. Culino, T. Daigne, F. Dornic, D. Duverne, P.-A. Ehgamberdiev, S. Eymar, L. Fouad, A. Freeberg, M. Gendre, B. Guo, F. Gokuldass, P. Guessoum, N. Gurbanov, E. Hainich, R. Hasanov, E. Hello, P. Inasaridze, R. Iskandar, A. Ismailov, N. Janati, A. Jegou du Laz, T. Kann, D.A. Karpov, S. Kiendrebeogo, R.W. Klotz, A. Kneip, R. Kochiashvili, N. Kaeouach, A. Kruiswijk, K. Lamoureux, M. Leroy, N. Lin, W.L. Mao, J. Marchais, D. Mašek, M. Midavaine, T. Moller, A. Morris, D. Natsvlishvili, R. Navarete, F. Nicuesa Guelbenzu, A. Noonan, K. Noysena, K. Oksanen, A. Orange, N.B. Pellouin, C. Peloton, J. Peng, H.W. Pilloix, M. Popowicz, A. Pradier, T. Pyshna, O. Raaijmakers, G. Rajabov, Y. Rau, A. Rinner, C. Rivet, J.-P. Ryh, A.S. Sabil, M. Sadibekova, T. Sasaki, N. Serrau, M. Simon, A. Shokry, Ahmed Smith, K. Sokoliuk, O. Song, X. Takey, A. Thierry, P. Tillayev, Y. Turpin, D. de Ugarte Postigo, A. Vasylenko, V. Vernet, D. Wang, L. Vachier, F. Vignes, J.P. Wang, X.F. Zeng, X. Zhang, J. Zhu, Y. Department of Physics and Astronomy University of Catania Catania95125 Italy Sorbonne Université CNRS UMR 7095 Institut d'Astrophysique de Paris 98 bis bd Arago Paris75014 France N.Tusi Shamakhy Astrophysical Observatory Azerbaijan National Academy of Sciences settl.Y. Mammadaliyev ShamakhyAZ 5626 Azerbaijan School of Physics and Astronomy University of Minnesota MinneapolisMN55455 United States Brown University RI ProvidenceRI02912 United States Oukaimeden Observatory High Energy Physics and Astrophysics Laboratory FSSM Cadi Ayyad University Av. Prince My Abdellah MarrakeshBP 2390 Morocco Université Côte d'Azur Observatoire de la Côte d'Azur CNRS Laboratoire J.-L. Lagrange Boulevard de l'Observatoire Nice06304 France 14 rue Saint-Hubert Orry-la-VilleF-60560 France E. Kharadze Georgian National Astrophysical Observatory Mt.Kanobili Abastumani Adigeni0301 Georgia Samtskhe-Javakheti State University Rustaveli Str. 113 Akhaltsikhe0080 Georgia N.Tusi Shamakhy astrophysical Observatory Azerbaijan National Academy of Sciences settl.Mamedaliyev ShamakhyAZ 5626 Azerbaijan Université Côte d'Azur Observatoire de la Côte d'Azur CNRS Artemis Boulevard de l'Observatoire Nice06304 France Astronomical Observatory Taras Shevshenko National University of Kyiv Observatorna str. 3 Kyiv04053 Ukraine Silesian University of Technology Faculty of Automatic Control Electronics and Computer Science Akademicka 16 Gliwice44-100 Poland GRAPPA Anton Pannekoek Institute for Astronomy Institute of High-Energy Physics University of Amsterdam Science Park 904 Amsterdam1098 XH Netherlands FZU - Institute of Physics The Czech Academy of Sciences Na Slovance 1999/2 PrahaCZ-182 21 Czech Republic Vereniging or Sterrenkunde Balen-Neetlaan 18A Mol2400 Belgium Ulugh Beg Astronomical Institute Uzbekistan Academy of Sciences Astronomy str. 33 Tashkent100052 Uzbekistan Centre for Astrophysics and Supercomputing Swinburne University of Technology HawthornVIC3122

Aims. We present a campaign designed to train the GRANDMA network and its infrastructure to follow up on transient alerts and detect their early afterglows. In preparation for O4 II campaign, we focused on GRB alerts as they are expected to be an electromagnetic counterpart of gravitational-wave events. Our goal was to improve our response to the alerts and start prompt observations as soon as possible to better prepare the GRANDMA network for the fourth observational run of LIGO-Virgo-Kagra (which started at the end of May 2023), and future missions such as SM. Methods. To receive, manage and send out observational plans to our partner telescopes we set up dedicated infrastructure and a rota of follow-up adcates were organized to guarantee round-the-clock assistance to our telescope teams. To ensure a great number of observations, we focused on Swift GRBs whose localization errors were generally smaller than the GRANDMA telescopes' field of view. This allowed us to bypass the transient identification process and focus on the reaction time and efficiency of the network. Results. During'Ready for O4 II', 11 Swift/INTEGRAL GRB triggers were selected, nine fields had been observed, and three afterglows were detected (GRB 220403B, GRB 220427A, GRB 220514A), with 17 GRANDMA telescopes and 17 amateur astronomers from the citizen science project Kilonova-Catcher. Here we highlight the GRB 220427A analysis where our long-term follow-up of the host galaxy allowed us to obtain a photometric redshift of z = 0.82 ± 0.09, its lightcurve elution, fit the decay slope of the afterglows, and study the properties of the host galaxy. Conclusions. During this 8-week-long GRB follow-up campaign, we successfully fulfilled our goal of training telescope teams for O4 and the improvement of the associated technical toolkits. For seven of the GRB alerts, our network was able to start the first observations less than one hour after the GRB trigger time. We also characterized the network effic

关键词： Telescopes

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Highly enhanced Q × f value of Ca0.61Nd0.26TiO3 ceramics with SnO2 additive

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IOP Conference Series: Materials science and Engineering 2019年第1期479卷

作者： Z Xiong B Tang C T Yang S R Zhang National Engineering Research Center of Electromagnetic Radiation Control Materials University of Electronic Science and Technology of China Chengdu 611731 China State Key Laboratory of Electronic Thin Films and Integrated Devices University of Electronic Science and Technology of China Chengdu 611731 Sichuan China

The microstructure and microwave dielectric properties of Ca0.61Nd0.26TiO3 + x mol SnO2 (0 ≤ x ≤ 0.05) ceramics (CNTSx) were investigated by Field Emission Scanning Electron Microscope, Hakki-Coleman dielectric resonator, network analyser and X-ray Diffractometer. The XRD results indicated that all CNTSx samples were formed as orthorhombic-perovskite-structured CaTiO3 phase. There were second phase Ti0.7Sn0.3O2 in range of 0.02 ≤ x ≤ 0.05. The SnO2 additive promoted the grain size of CNT ceramic, which was conducive to the promotion of Q × f value. Although the r value declined as contents of SnO2 increased, the SnO2 additive had a little of amelioration for τf value. Finally, the CNTS0.01 ceramic sintered at 1400 °C had stable comprehensive dielectric characteristic: r ~ 105.2, Q × f ~ 14,369 GHz, τf ~ +262.3 ppm/ºC.

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Memory Devices: MoS2/Polymer Heterostructures Enabling Stable Resistive Switching and Multistate Randomness (Adv. Mater. 42/2020)

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Advanced Materials 2020年第42期32卷

作者： Jianwei Chai Shiwun Tong Changjian Li Carlos Manzano Bing Li Yanpeng Liu Ming Lin Laimun Wong Jianwei Cheng Jing Wu Aaron Lau Qidong Xie Stephen J. Pennycook Henry Medina Ming Yang Shijie Wang Dongzhi Chi Institute of Materials Research and Engineering Agency for Science Technology and Research (A*STAR) Innovis 2 Fusionopolis Way Singapore 138634 Singapore Department of Materials Science and Engineering National University of Singapore 9 Engineering Drive 1 Singapore 117575 Singapore State Key Laboratory of Mechanics and Control of Mechanical Structures MOE Key Laboratory for Intelligent Nano Materials and Devices and Institute of Nano Science Nanjing University of Aeronautics and Astronautics Nanjing 210016 China

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Suppressing Intentional Electromagnetic Interference (IEMI) in Wireless Communication System Using Complex Signal Spectrum Shifting Technique

Suppressing Intentional Electromagnetic Interference (IEMI) ...

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IEEE Symposium on Electromagnetic Compatibility, Signal Integrity and Power Integrity (EMC, SI & PI)

作者： Jing-Gao Wang Hao Xie Kai-Qi Xiao Ya-Zhou Chen Ji-Xin Chen Yan-Yan Zhang Wen-Yan Yin Innovative Institute of Electromagnetic Information and Electronic Integration Zhejiang University Hangzhou China Science and Technology on Electronic Information control Laboratory Chengdu China National Key Lab of Science and Technology on Electromagnetic Environment Effects Shijia Zhuang China

It is well known that (non)intentional electromagnetic interference (IEMI) can cause the performance degradation and the rise of bit error rate (BER) of wireless communication system. This paper presents the study on suppressing intentional electromagnetic interference in communication system using complex signal spectrum shifting technique. The anti-IEMI techniques are at first introduced, and further, modeling process and simulated results of bit error rate (BER) are given for different signal to noise ratio (SNR) and signal to interference ratio (SIR).

关键词： Frequency shift keying White noise Electromagnetic interference Wireless communication

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Design of reducing mutual coupling in between two closely spaced dual-frequency antennas based on combined electromagnetic soft surfaces

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Applied Physics A: Materials science and Processing 2018年第12期124卷 811-811页

作者： Chen, Haiyan Li, Guanya Han, Liandi Zhou, Yang Zhou, Zhipeng Li, Xiaoqiu Weng, Xiaolong Zhang, Li Liang, Difei Xie, Jianliang Deng, Longjiang National Engineering Research Center of Electromagnetic Radiation Control Materials State Key Laboratory of Electronic Thin Film and Integrated Devices University of Electronic Science and Technology of China Chengdu 610054 China National Key Laboratory of Antenna and Microwave Technology Nanjing Research Institute of Electronics Technology Nanjing 210013 China Chengdu Jia Chi Electronic Technology Co. Ltd Chengdu 610041 China

In this paper, two closely spaced dual-frequency antennas are developed using the combined electromagnetic soft surfaces loading techniques for reducing their mutual coupling. The dual-frequencies antenna is designed and its return loss is less than − 10 dB at 4.1 GHz and 5.65 GHz. The electromagnetic soft surfaces are realized by metal strips with C-shaped slots, which have variable working frequency with unit size changing. The dual-band electromagnetic bandgap can be obtained by combined with two electromagnetic soft surfaces with various cell sizes. Experimental results are presented and compared to numerical simulations, and they demonstrated that the proposed electromagnetic soft surfaces loading advance excellent suppression of electromagnetic coupling and the coupling decrease about 16 dB and 19 dB near the working frequencies, respectively. Furthermore, the return loss of the dual-frequencies antennas with this technique is further reduced at its working frequency bands. Measured data show a reasonably good agreement between the simulation and experimental results. © 2018, Springer-Verlag GmbH Germany, part of Springer Nature.

关键词： working frequency RETURN LOSS Photonic band gap Electromagnetic coupling ELECTROMAGNETIC Mutual coupling technology

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Enhanced terahertz electromagnetically induced transparency metamaterials via inconsistent thickness of the resonators

Enhanced terahertz electromagnetically induced transparency ...

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International Conference on Infrared, Millinmeter, and Terahertz Waves

作者： Lan Wang Yaxin Zhang Shixiong Liang Zongjun Shi Ziqiang Yang Terahertz Science Cooperative Innovation Center University of Electronic Science and Technology of China Chengdu China National Key Laboratory of Application Specific Integrated Circuit Hebei Semiconductor Research Institute Shijiazhuang China

We demonstrate a classical analogue of electromagnetically induced transparency (EIT) in a planar terahertz metamaterial comprised of uneven ring resonators. Here we present control of EIT through tuning of thickness ... 详细信息

关键词： Couplings Metamaterials Resonators Optical ring resonators Substrates Electric fields Magnetic resonance

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