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Biopolymer passivation for high-performance perovskite solar cells by blade coating

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Journal of Energy Chemistry 2021年第3期30卷 45-52页

作者： Shudi Qiu Xin Xu Linxiang Zeng Zhen Wang Yijun Chen Culling Zhang Chaohui Li Jinlong Hu Tingting Shi Yaohua Mai fei guo Institute of New Energy Technology College of Information Science and TechnologyJinan UniversityGuangzhou 510632GuangdongChina Siyuan Laboratory Guangzhou Key Laboratory of Vacuum Coating Technologies and New Energy Materials Department of Physics Jinan UniversityGuangzhou 510632GuangdongChina College of Chemistry Environmental Engineering Datong University.Datong 037009ShanxiChina National Engineering Research Center for Advanced Polymer Processing Technology Zhengzhou UniversityZhengzhou 450002HenanChina

Thin films of perovskite deposited from solution inevitably introduce large number of defects,which serve as recombination centers and are detrimental for solar cell *** many small molecules and polymers have been delicately designed to migrate defects of perovskite films,exploiting credible passivation agents based on natural materials would offer an alternative ***,an ecofriendly and cost-effective biomaterial,ploy-L-lysine(PLL),is identified to effectively passivate the defects of perovskite films prepared by *** is found that incorporation of a small amount(2.5 mg mL^(-1))of PLL significantly boosts the performance of printed devices,yielding a high efficiency of 19.45% with an increase in open-circuit voltage by up to 100 *** functional theory calculations combined with X-ray photoelectron spectroscopy reveal that the functional groups(-NH2,-COOH)of PLL effectively migrate the Pb-I antisite defects via Pb-N coordination and suppress the formation of metallic Pb in the blade-coated perovskite *** work suggests a viable avenue to exploit passivation agents from natural materials for preparation of high-quality perovskite layers for optoelectronic applications.

关键词： Perovskite solar cells Blade coating Biopolymer passivation Density functional theory

The role of oxygen vacancies in the high cycling endurance and quantum conductance in BiVO4-based resistive switching memory

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InfoMat 2020年第5期2卷 960-967页

作者： Mengting Zhao Xiaobing Yan Long Ren Mengliu Zhao fei guo Jincheng Zhuang Yi Du Weichang Hao School of Physics and BUAA-UOW Joint Research Centre Beihang UniversityBeijingChina College of Electronic and Information Engineering Hebei UniversityBaodingChina Institute for Superconducting and Electronic Materials University of WollongongWollongongNew South WalesAustralia

Resistive random access memory(RRAM)has emerged as a new discipline promoting the development of new materials and devices toward a broad range of electronic and energy ***,we realized a memristive device with weak dependence on the top electrodes and demonstrated the quantized conductance(QC)nature in BiVO4 *** electronic properties have been investigated by the measurements of I-V curves,where the resistive switching(RS)phenomenon with stable switching ratio and excellent longterm retention capabilities are *** more inert materials,TiN and Pd,are applied as the top electrodes to exclude the influence of electrodes on the RS states and QC *** X-ray photoelectron spectroscopy results and transport measurements reveal that the conductive filament(CF)is composed by elemental *** naturally existed oxygen vacancies in BiVO4 matrix plays as the role of catalyst in the formation and dissolution of CF in BiVO4-based RRAM device,which is the primary cause for the observed weak dependence of switching performance in this device on the type of top *** results clearly illustrate that BiVO4 could be a new idea platform to realize the high scalability,high cycling endurance,and multilevel storage RRAM devices.

关键词： Bi nanowires BiVO4 quantum conductance RRAM

The CREB Regulated Transcription Coactivator 2 Suppresses HIV-1 Transcription by Preventing RNA PolⅡfrom Binding to HIV-1 LTR

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Virologica Sinica 2021年第4期36卷 796-809页

作者： Ling Ma Shumin Chen Zhen Wang Saisai guo Jianyuan Zhao Dongrong Yi Quanjie Li Zhenlong Liu fei guo Xiaoyu Li Pingping Jia Jiwei Ding Chen Liang Shan Cen Institute of Medicinal Biotechnology Chinese Academy of Medical Sciences and Peking Union Medical SchoolBeijing 100050China Department of Blood Transfusion The Affiliated Hospital of Qingdao UniversityQingdao 266000China Lady Davis Institute Jewish General HospitalMcGill UniversityMontrealQC H3T 1E2Canada Institute of Pathogen Biology Chinese Academy of Medical Sciences and Peking Union Medical SchoolBeijing 100176China Beijing Shijitan Hospital Capital Medical UniversityBeijing 100038China CAMS Key Laboratory of Antiviral Drug Research Peking Union Medical CollegeChinese Academy of Medical SciencesBeijing 100050China Beijing Friendship Hospital Capital Medical UniversityBeijing 100029China

The CREB-regulated transcriptional co-activators(CRTCs),including CRTC1,CRTC2 and CRTC3,enhance transcription of CREB-targeted *** addition to regulating host gene expression in response to cAMP,CRTCs also increase the infection of several *** human immunodeficiency virus type 1(HIV-1)long terminal repeat(LTR)promoter harbors a cAMP response element and activation of the cAMP pathway promotes HIV-1 transcription,it remains unknown whether CRTCs have any effect on HIV-1 transcription and HIV-1 ***,we reported that CRTC2 expression was induced by HIV-1 infection,but CRTC2 suppressed HIV-1 infection and diminished viral RNA *** studies revealed that CRTC2 inhibited transcription from HIV-1 LTR and diminished RNA PolⅡoccupancy at the LTR independent of its association with ***,CRTC2 inhibits the activation of latent ***,these data suggest that in response to HIV-1 infection,cells increase the expression of CRTC2 which inhibits HIV-1 gene expression and may play a role in driving HIV-1 into latency.

关键词： Human immunodeficiency virus(HIV) RNA polymeraseⅡ(RNA PolⅡ) Viral transcription Infection Virology CREB regulated transcription coactivator 2(CRTC2) Long terminal repeat(LTR) Latency

The Role of Neutrophils in Cancer Development

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Journal of Nutritional Oncology 2019年第2期4卷 85-90页

作者： fei fei guo Jiu Wei Cui Cancer Center of The First Hospital of Jilin University Changchun Jilin 130021 China

In recent years, the numerous roles of neutrophils have gained increasing attention. Beyond their traditional role in infection control, research on neutrophils has expanded to their roles in tumor regulation. It has been found that neutrophils present in the tumor microenvironment, tumor-associated neutrophils (TANs), exert complex and apparently opposing effects by reducing and promoting tumor growth and progression in response to various factors in the tumor microenvironment. In addition, recent studies have reported the heterogeneity and complex tumor regulation of circulating neutrophils. The present paper provides a summary of the related research progress.

关键词： Tumor microenvironment Circulating neutrophils Tumor-associated neutrophils Cancer therapy

A possible probe to neutron-skin thickness by fragment parallel momentum distribution in projectile fragmentation reactions

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Nuclear Science and Techniques 2024年第6期35卷 114-119页

作者： Chun-Wang Ma Yi-Jie Duan Ya-fei guo Chun-Yuan Qiao Yu-Ting Wang Jie Pu Kai-Xuan Cheng Hui-Ling Wei College of Physics Henan Normal UniversityXinxiang 453007China Institute of Nuclear Science and Technology Henan Academy of SciencesZhengzhou 450015China

Neutron-skin thickness is a key parameter for a neutron-rich nucleus;however,it is difficult to *** the framework of the Lanzhou Quantum Molecular Dynamics(LQMD)model,a possible probe for the neutron-skin thickness(δ_(np))of neutron-rich ^(48)Ca was studied in the 140A MeV ^(48)Ca+^(9)Be projectile fragmentation reaction based on the parallel momentum distribution(p∥)of the residual fragments.A Fermi-type density distribution was employed to initiate the neutron density distributions in the LQMD simulations.A combined Gaussian function with different width parameters for the left side(Γ_(L))and the right side(Γ_(R))in the distribution was used to describe the p∥of the residual *** neutron-rich sulfur isotopes as examples,Γ_(L) shows a sensitive correlation withδ_(np) of ^(48)Ca,and is proposed as a probe for determining the neutron skin thickness of the projectile nucleus.

关键词： Neutron-skin thickness Projectile fragmentation Parallel momentum distribution Neutron-rich nucleus Quantum molecular dynamics model

TRAF3 activates STING-mediated suppression of EV-A71 and target of viral evasion

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Signal Transduction and Targeted Therapy 2023年第3期8卷 1296-1309页

作者： Wenwen Zheng Zhenbang Zhou Yajuan Rui Runxin Ye Fengyan Xia fei guo Xiaoman Liu Jiaming Su Meng Lou Xiao-Fang Yu Cancer Institute(Key Laboratory of Cancer Prevention and Intervention China National Ministry of Education)The Second Affiliated HospitalZhejiang University School of MedicineHangzhouZhejiang 310009China National Health Commission of the People’s Republic of China Key Laboratory of Systems Biology of Pathogens Institute of Pathogen Biology and Center for AIDS ResearchChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100730China Cancer Center Zhejiang UniversityHangzhouZhejiang 310058China

Innate immunity represents one of the main host responses to viral infection.1,2,3 STING(Stimulator of interferon genes),a crucial immune adapter functioning in host cells,mediates cGAS(Cyclic GMP-AMP Synthase)sensing of exogenous and endogenous DNA fragments and generates innate immune responses.4 Whether STING activation was involved in infection and replication of enterovirus remains largely *** the present study,we discovered that human enterovirus A71(EV-A71)infection triggered STING activation in a cGAS dependent ***-A71 infection caused mitochondrial damage and the discharge of mitochondrial DNA into the cytosol of infected ***,during EV-A71 infection,cGAS-STING activation was ***-A71 ^(pro)teins were screened and the viral ^(pro)tease 2A^(pro) had the greatest capacity to inhibit cGAS-STING *** identified TRAF3 as an important factor during STING activation and as a target of 2A^(pro).Supplement of TRAF3 rescued cGAS-STING activation suppression by 2A^(pro).TRAF3 supported STING activation mediated TBK1 ***,we found that 2A^(pro) ^(pro)tease activity was essential for inhibiting STING ***,EV-D68 and CV-A16 infection also triggered STING *** viral ^(pro)tease 2A^(pro) from EV-D68 and CV-A16 also had the ability to inhibit STING *** STING activation prior to EV-A71 infection generated cellular resistance to EV-A71 replication,blocking EV-A71-mediated STING suppression represents a new anti-viral target.

关键词： mediated TRAF3 immunity

Initial detections and spread of invasive Spodoptera frugiperda in China and comparisons with other noctuid larvae in cornfields using molecular techniques

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Insect Science 2020年第4期27卷 780-790页

作者： Da-Peng Jing Jing-fei guo Yu-Ying Jiang Jian-Zhou Zhao Amit Sethi Kang-Lai He Zhen-Ying Wang State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijingChina China National AgroTech Extension and Service Center BeijingChina Corteva Agriscience JohnstonIAUSA

The fall armyworm,Spodoptera frugiperda,is a species native to the Americas and has spread to many countries in Africa and Asia in recent *** actions for potential invasion of *** to China coordinated by government agencies and agricultural extension systems resulted in timely detection in January 2019 in Yunnan province neighboring onto *** extensive monitoring in southern provinces of China since February 2019 resulted in dynamic tracking of *** spreading to 13 provincial regions in China within 4 months by May 10,2019,which is crucial for timely management actions in the *** first detections of ***(corn strain)in China were confirmed using cytochrome oxidase subunit 1(COl)and triosephosphate isomerase(Tpi)genes molecular marker *** addition to ***,larvae of three other noctuid species with similar morphological appearance(***,*** and Mythimna separata)can occur simultaneously and cause similar damage in cornfields in southern ***,we can use both morphological and molecular marker methods to compare larval stages of four noctuid ***,we discuss the risk of potential spread of invasive *** to other regions and impact on corn production in China.

关键词： com molecular identification Mythimna separata,Spodoptera exigua Spodoptera frugiperda',Spodoptera litura

输尿管镜钬激光碎石术与体外冲击波碎石术治疗输尿管上段1 cm以上结石的疗效比较

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实用医院临床杂志 2019年第1期16卷 18-20页

作者：飞国庆攀钢集团总医院泌尿外科四川攀枝花617000

目的探讨输尿管镜钬激光碎石术与体外冲击波碎石术(ESWL)治疗输尿管上段1 cm以上结石的疗效。方法2016年1月至2017年6月入院的300例输尿管上段1 cm以上结石患者,按随机数字表法分为两组各150例,钬激光组采用输尿管镜钬激光碎石术,ESWL... 详细信息

目的探讨输尿管镜钬激光碎石术与体外冲击波碎石术(ESWL)治疗输尿管上段1 cm以上结石的疗效。方法2016年1月至2017年6月入院的300例输尿管上段1 cm以上结石患者,按随机数字表法分为两组各150例,钬激光组采用输尿管镜钬激光碎石术,ESWL组采用ESWL术,比较两组围手术期指标、并发症、炎性应激与远期预后。结果钬激光组手术时间、止痛药使用率、术后血尿时间、住院时间、总体并发症率及术后白细胞计数、白介素-6水平均低于ESWL组,总有效率及术后6个月生理功能、角色限制、身体疼痛、总体健康评分均高于ESWL组(P <0. 05)。结论输尿管镜钬激光碎石术治疗输尿管上段1 cm以上结石的疗效更为显著,安全性更高,具有推广意义。

关键词：输尿管镜钬激光碎石术 ESWL 输尿管结石并发症

Interpenetrating structure for efficient Sb_(2)Se_(3) nanorod array solar cells loaded with CuInSe_(2) QDs sensitizer

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Journal of Energy Chemistry 2022年第5期31卷 521-528页

作者： Cong Liu Zhenxiao Pan Kai Shen Jianzha Zheng Xiaoyang Liang Hongbing Zhu fei guo Zhiqiang Li Ruud E.I.Schropp Yaohua Mai Institute of New Energy Technology College of Information Science and TechnologyJinan UniversityGuangzhou 510632GuangdongChina Key Laboratory for Biobased Materials and Energy of Ministry of Education College of Materials and EnergySouth China Agricultural UniversityGuangzhou 510642GuangdongChina National-Local Joint Engineering Laboratory of New Energy Photoelectric Devices College of Physics Science and TechnologyHebei UniversityBaoding 071002HebeiChina

The strong anisotropic electrical properties of one-dimensional(1 D) nanostructure semiconductors,especially the anisotropic carrier transport, have a negative and significant influence on the performance of solar cells if the nanostructures have random orientation. Considering the advantages of nanorod solar cells in carrier transport, we have achieved growth of vertically aligned Sb_(2)Se_(3) nanorod array with highly(hk1) orientation on Cd S substrate, and constructed superstrate nanorod solar cells for the first time. The Sb_(2)Se_(3) nanorod array solar cells exhibit the more efficient and long-range carrier transport in vertical direction. Furthermore, in order to suppress interface recombination, a CuInSe_(2) quantum dots(QDs) sensitizer has been applied to fill the volume between the nanorods completely, thus forming an interpenetrating nanocomposite structure. The CuInSe_(2) QDs can harvest additional light by absorption of visible light and contribute photocurrent. Meantime, the QDs function as a hole transport material and thus reduce the dependence of lateral transport. Consequently, the interpenetrating nanocomposite CuInSe_(2) / Sb_(2)Se_(3) solar cells display a power conversion efficiency of 7.54% with significant enhancements in the short-circuit current density and open-circuit voltage over pure Sb_(2)Se_(3) nanorod cells. This is the highest efficiency for superstrate solar cells based on Sb_(2)Se_(3) nanorod arrays.

关键词： Superstrate solar cells Sb_(2)Se_(3)nanorod arrays Carrier transport Interpenetrating structure CuInSe_(2)QDs