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光电效应与光电子能谱分析技术

物理教学 2023年第5期45卷 2-7页

作者：王伟杨金彭 Xianjie Liu 保秦烨扬州大学物理科学与技术学院江苏225009 瑞典林雪平大学有机电子实验室北雪平60174 华东师范大学物理与电子科学学院上海200241

本文介绍光电效应现象及其实验验证的重要性,从光电效应的原理出发介绍光电子能谱分析仪的构建、发展及其应用,如何利用光电子能谱分析技术手段来开展对各种材料表面进行物理特性的研究,最后对光电子能谱的运用发展进行展望。

关键词：光电效应电子结构光电子能谱能带色散

Influence of backfilling rate on the stability of the"backfilling bodyimmediate roof"cooperative bearing structure

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International Journal of Mining Science and Technology 2022年第6期32卷 1197-1206页

作者： xianjie Du Guorui Feng Min Zhang Zehua Wang Wenhao liu College of Mining Engineering Taiyuan University of TechnologyTaiyuan 030024China Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering Taiyuan 030024China Key Laboratory of Shanxi Province for Mine Rock Strata Control and Disaster Prevention Taiyuan 030024China State Key Laboratory for GeoMechanics and Deep Underground Engineering China University of Mining and TechnologyXuzhou 221116China Zhengzhou Coal Industry(Group)Co LtdZhengzhou 450007China College of Civil Engineering Taiyuan University of TechnologyTaiyuan 030024China

To reduce the cost of backfilling coal mining and utilize the underground space of coal mines,a new backfilling mining method with low backfilling rate called constructional backfilling coal mining(CBCM)is proposed.The "backfilling body-immediate roof" cooperative bearing structure of CBCM is analyzed by establishing the model of the medium thick plate on an elastic foundation.The influence of the backfilling rate on the stability of overlying strata is analyzed by the numerical simulation experiment.The control effect of CBCM is verified by a physic similar simulation test.The economic benefit of CBCM is analyzed.The conclusions are:the deformation characteristics of the immediate roof and critical backfilling spacing in CBCM can be analyzed based on the Hu Haichang’s theory.Exerting the bearing capacity of the immediate roof is beneficial to the stability of the overlying strata.The CBCM has a good control effect on the overburden in Xinyang Mine when the backfilling rate is lower than 25%.The backfilling cost of per ton coal is 37.39 yuan/t when the backfilling rate is 13.7%,with a decrease rate of 56.63%than the full-filling.The research results can provide theoretical support for the application of CBCM in coal mining.

关键词： Constructional backfilling coal mining Immediate roof Cooperative bearing structure Medium thick plate on elastic foundation Backfilling rate Overlying strata

Pinning energies of organic semiconductors in high-efficiency organic solar cells

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Journal of Semiconductors 2023年第3期44卷 52-61页

作者： Xian’e Li Qilun Zhang Xianjie Liu Mats Fahlman Laboratory of Organic Electronics Department of Science and Technology(ITN)Linköping UniversitySE-60174NorrköpingSweden Wallenberg Wood Science Center Department of Science and Technology(ITN)Linköping UniversitySE-60174NorrköpingSweden

With the emergence of new materials for high-efficiency organic solar cells(OSCs),understanding and finetuning the interface energetics become increasingly important.Precise determination of the so-called pinning energies,one of the critical characteristics of the material to predict the energy level alignment(ELA)at either electrode/organic or organic/organic interfaces,are urgently needed for the new materials.Here,pinning energies of a wide variety of newly developed donors and nonfullerene acceptors(NFAs)are measured through ultraviolet photoelectron spectroscopy.The positive pinning energies of the studied donors and the negative pinning energies of NFAs are in the same energy range of 4.3−4.6 eV,which follows the design rules developed for fullerene-based OSCs.The ELA for metal/organic and inorganic/organic interfaces follows the predicted behavior for all of the materials studied.For organic-organic heterojunctions where both the donor and the NFA feature strong intramolecular charge transfer,the pinning energies often underestimate the experimentally obtained interface vacuum level shift,which has consequences for OSC device performance.

关键词： organic semiconductors organic solar cells pinning energies integer charge transfer interface dipoles

A progressive approach to predict shot peening process parameters for forming integral panel of Al7050-T7451

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Chinese Journal of Aeronautics 2021年第5期34卷 617-627页

作者： Chuang liu Zhiyong ZHAO xianjie ZHANG Junbiao WANG School of Mechanical Engineering Northwestern Poly technical UniversityXi'an 710072China

In this paper,a progressive approach to predict the multiple shot peening process parameters for complex integral panel is proposed.Firstly,the invariable parameters in the forming process including shot size,mass flow,peening distance and peening angle are determined according to the empirical and machine type.Then,the optimal value of air pressure for the whole shot peening is selected by the experimental data.Finally,the feeding speed for every shot peening path is predicted by regression equation.The integral panel part with thickness from 2 mm to 5 mm and curvature radius from 3200 mm to 16000 mm is taken as a research object,and four experiments are conducted.In order to design specimens for acquiring the forming data,one experiment is conducted to compare the curvature radius of the plate and stringer-structural specimens,which were peened along the middle of the two stringers.The most striking finding of this experiment is that the outer shape error range is below 3.9%,so the plate specimens can be used in predicting feeding speed of the integral panel.The second experiment is performed and results show that when the coverage reaches the limit of 80%,the minimum feeding speed is 50 mm/s.By this feeding speed,the forming curvature radius of the specimens with different thickness from the third experiment is measured and compared with the research object,and the optimal air pressure is 0.15 MPa.Then,the plate specimens with thickness from 2 mm to 5 mm are peened in the fourth experiment,and the measured curvature radius data are used to calculate the feeding speed of different shot peening path by regressive analysis method.The algorithm is validated by forming a test part and the average deviation is 0.496 mm.It is shown that the approach can realize the forming of the integral panel precisely.

关键词： Curvature radius measure Integral panel Process parameters prediction Regressive analysis method Shot peening process

Conformance control by a microgel in a multi-layered heterogeneous reservoir during CO_(2) enhanced oil recovery process

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Chinese Journal of Chemical Engineering 2022年第3期35卷 324-334页

作者： Zheyu liu Jian Zhang xianjie Li Chunming Xu Xin Chen Bo Zhang Guang Zhao Han Zhang Yiqiang Li State Key Laboratory of Heavy Oil Processing China University of Petroleum(Beijing)Beijing 102249China College of Petroleum Engineering China University of Petroleum(Beijing)Beijing 102249China China National Offshore Oil Corporation Research Institute CNOOCBeijing 100028China School of Petroleum Engineering China University of Petroleum(East China)QingdaoShandong 266580China

Injecting CO_(2)into the underground for oil displacement and shortage is an important technique for carbon capture,utilization and storage(CCUS).One of the main problems during the CO_(2)injection is the channeling plugging.Finding an effective method for the gas channeling plugging is a critical issue in the CO_(2)EOR process.In this work,an acid-resistance microgel named dispersed particle gel(DPG)was characterized and its stability was tested in the CO_(2)environment.The microgel size selection strategies for the homogeneous and heterogeneous reservoirs were respectively investigated using the single core flooding and three parallel core flooding experiments.Moreover,the comparison of microgel alternate CO_(2)(MAC)injection and water alternate CO_(2)(WAC)injection in the dual core flooding experiments were presented for the investigation of the role of microgel on the conformance control in CO_(2)flooding process.The results have shown that the microgel featured with ANH and CAN groups can keep its morphology after aging 7 days in the CO_(2)environment.Where,the small microgel with unobstructed migration and large microgel with good plugging efficiency for the high permeability zone were respectively featured with the higher recovery factor in homogeneous and heterogeneous conditions,which indicate they are preferred used for the oil displacement and conformance control.Compared to WAC injection,MAC injection had a higher incremental recovery factor of 12.4%.It suggests the acid-resistance microgel would be a good candidate for the conformance control during CO_(2)flooding process.

关键词： Carbon dioxide Microgels Enhanced oil recovery Conformance control Porous media

One-dimensional constrained inversion of electrical source transient electromagnetic method

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Earthquake Research Advances 2021年第S01期1卷 41-44页

作者： Guoru Nai Zhuoliang Xie xianjie Chen Wei liu School of Geophysics Chengdu University of TechnologyChengduSichuanChina

The damped least squares inversion principle is applied to the transient electromagnetic one-dimensional inversion of electrical sources,and a new model is obtained by continuously iterating the initial model,thereby fitting the observed transient electromagnetic response,and performing one-dimensional inversion through induced electromotive force play.In this paper,in the damped least squares inversion,constraints are added to the Jacobian matrix,and simultaneous constraint equations and conventional inversion equations are solved.By weighting the constraint parameters,the difference between adjacent resistivities and layer thicknesses is minimized.Finally,K-type and H-type theoretical models were used to verify the reliability of the algorithm,and compared with the conventional transient electromagnetic damping least squares inversion.

关键词： Transient electromagnetic method Damped least squares Constrained inversion

Magnetic Array Assisted Triboelectric Nanogenerator Sensor for Real‑Time Gesture Interaction

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Nano-Micro Letters 2021年第3期13卷 168-176页

作者： Ken Qin Chen Chen xianjie Pu Qian Tang Wencong He Yike liu Qixuan Zeng Guanlin liu Hengyu Guo Chenguo Hu Department of Applied Physics State Key Laboratory of Power Transmission Equipment&System Security and New TechnologyChongqing Key Laboratory of Soft Condensed Matter Physics and Smart MaterialsChongqing UniversityChongqing 400044People’s Republic of China Center On Nanoenergy Research School of Physical Science and TechnologyGuangxi UniversityNanningGuangxi 530004People’s Republic of China

In human-machine interaction,robotic hands are useful in many scenarios.To operate robotic hands via gestures instead of handles will greatly improve the convenience and intuition of human-machine interaction.Here,we present a magnetic array assisted sliding triboelectric sensor for achieving a real-time gesture interaction between a human hand and robotic hand.With a finger’s traction movement of flexion or extension,the sensor can induce positive/negative pulse signals.Through counting the pulses in unit time,the degree,speed,and direction of finger motion can be judged in realtime.The magnetic array plays an important role in generating the quantifiable pulses.The designed two parts of magnetic array can transform sliding motion into contact-separation and constrain the sliding pathway,respectively,thus improve the durability,low speed signal amplitude,and stability of the system.This direct quantization approach and optimization of wearable gesture sensor provide a new strategy for achieving a natural,intuitive,and real-time human-robotic interaction.

关键词： Sliding triboelectric sensor Magnetic array Gesture Real-time Human-machine interaction

Effect of Loss-of-function of the Herpes Simplex Virus-1 microRNA H6-5p on Virus Replication

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Virologica Sinica 2019年第4期34卷 386-396页

作者： Rongquan Huang Xusha Zhou Shuqi Ren Xianjie Liu Zhiyuan Han Grace Guoying Zhou School of Basic Medical Sciences Guangzhou Medical UniversityGuangzhou 511436China Shenzhen International Institute for Biomedical Research Shenzhen 518116China

To date, 29 distinct microRNAs(miRNAs) have been reported to be expressed during herpes simplex virus infections.Sequence analysis of mature herpes simplex virus-1(HSV-1) miRNAs revealed five sets of miRNAs that are complementary to each other: miR-H6-5p/H1-3p, miR-H6-3p/H1-5p, H2-5p/H14-3p, miR-H2-3p/H14-5p, and miR-H7/H27.However, the roles of individual miRNAs and consequences of this complementarity remain unclear. Here, we focus on two of these complementary miRNAs, miR-H6-5p and miR-H1-3p, using loss-of-function experiments in vitro and in a mouse model of infection using an miRNA sponge approach, including tandem multiplex artificial miRNA-binding sequences that do not match perfectly to the target miRNA inserted downstream of a green fluorescent protein reporter gene. Infection with recombinant virus expressing the miR-H6-5p sponge reduced viral protein levels and virus yield.Decreased accumulation of viral proteins was also observed at early stages of infection in the presence of both an miR-H6-5p inhibitor and plasmid-expressed miR-H1-3p. Moreover, establishment of latency and reactivation did not differ between the recombinant virus expressing the miR-H6-5p sponge and wild-type HSV-1. Taken together, these data suggest that miR-H6-5p has an as-yet-unidentified role in the early stages of viral infection, and its complement miR-H1-3p suppresses this role in later stages of infection. This report extends understanding of the roles of miRNAs in infection by herpes simplex viruses, supporting a model of infection in which the production of virus and its virulent effects are tightly controlled to maximize persistence in the host and population.

关键词： miR-H6-5p miR-H1-3p Sponge Replication Herpes simplex virus-1(HSV-1)

Defect passivation by nontoxic biomaterial yields 21% efficiency perovskite solar cells

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Journal of Energy Chemistry 2021年第4期30卷 265-271页

作者： Shaobing Xiong Tianyu Hao Yuyun Sun Jianming Yang Ruru Ma Jiulong Wang Shijing Gong Xianjie Liu Liming Ding Mats Fahlman Qinye Bao Key Laboratory of Polar Materials and Devices Department of Electronic ScienceSchool of Physics and Electronic ScienceEast China Normal UniversityShanghai 200241China School of Chemistry and Chemical Engineering Shanghai Jiao Tong UniversityShanghai 200025China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006ShanxiChina Laboratory of Organic Electronics ITNLinköping UniversitySE-60174 NorrköpingSweden Wallenberg Wood Science Center Linköping UniversitySE-60174 NorrköpingSweden Center for Excellence in Nanoscience(CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication(CAS)National Center for Nanoscience and TechnologyBeijing 100190China

Defect passivation is one of the most important strategies to boost both the efficiency and stability of perovskite solar cells(PSCs).Here,nontoxic and sustainable forest-based biomaterial,betulin,is first introduced into perovskites.The experiments and calculations reveal that betulin can effectively passivate the uncoordinated lead ions in perovskites via sharing the lone pair electrons of hydroxyl group,promoting charge transport.As a result,the power conversion efficiencies of the p-i-n planar PSCs remarkably increase from 19.14%to 21.15%,with the improvement of other parameters.The hydrogen bonds of betulin lock methylamine and halogen ions along the grain boundaries and on the film surface and thus suppress ion migration,further stabilizing perovskite crystal structures.These positive effects enable the PSCs to maintain 90%of the initial efficiency after 30 days in ambient air with 60%±5%relative humidity,75%after 300 h aging at 85℃,and 55%after 250 h light soaking,respectively.This work opens a new pathway for using nontoxic and low-cost biomaterials from forest to make highly efficient and stable PSCs.

关键词： Perovskite solar cells Defect passivation Nontoxic biomaterial Efficiency