检索结果-内蒙古大学图书馆

Superlubricity achieved by polyvinylpyrrolidone at Si₃N₄/sapphire interfaces

Friction 2025年第6期13卷 112-121页

作者： Hongdong Wang Zhen Luo Kunpeng Wang Yuhong Liu Jianhua Zhang 2State Key Laboratory of Tribology in Advanced Equipment Tsinghua University Beijing 100084 China 1School of Mechatronic Engineering and Automation and Key Laboratory of Advanced Display and System Application Ministry of Education Shanghai University Shanghai 200444 China

Polymers have complex molecular structures that often lead to interchain friction and hinder movement, making it difficult to achieve superlubricity. However, in the field of hydration lubrication, the electronegative interface of ceramics readily adsorbs water molecules, creating a protective water film that covers the frictional interface and effectively reduces friction. To achieve hydration lubrication, it is essential to create a continuous lubricating film by selectively enriching specific functional groups of adsorbed water molecules from the polymer solution onto the ceramic surface. By adsorbing a hydrophilic layer composed of polyvinylpyrrolidone with pyrrolidone groups onto a negatively charged Si 3 N 4 /sapphire interface, we formed a continuous lubricating film. Research has shown that the interaction between the polymer chain structure of polyvinylpyrrolidone molecules (such as PVP10000) in solution and water molecules could result in excellent superlubricity. When the contact pressure exceeds 198 MPa, the coefficients of friction (COF) can be reduced to 0.004–0.007. Through detailed surface analyses and sophisticated simulations, we uncovered the underlying mechanism involved. The pyrrolidone moieties of polyvinyl pyrrolidone (PVP) formed hydrogen bonds with the Si 3 N 4 surface, transforming the initially difficult frictional interface into a PVP/sapphire interface with significantly reduced sliding energy barriers. These findings highlight the vital role of PVP in superlubricity and hydration lubrication and provide a theoretical and experimental basis for the design of materials and lubricants with exceptional lubricating properties.

关键词： superlubricity polyvinyl pyrrolidone (PVP) hydration lubrication molecular simulation

来源：评论

学校读者我要写书评

暂无评论

Chlorine-Substituent Regulation in Dopant-Free Small-Molecule Hole-Transport Materials Improves the Effi ciency and Stability of Inverted Perovskite Solar Cells

引用

Transactions of Tianjin University 2024年第4期30卷 314-323页

作者： Xinyi Liu Xiaoye Zhang Zhanfeng Li Jinbo Chen Yanting Tian Baoyou Liu Changfeng Si Gang Yue Hua Dong Zhaoxin Wu Key Laboratory of Advanced Transducers and Intelligent Control System Ministry of Education and Shanxi ProvinceTaiyuan University of TechnologyTaiyuan 030024China School of Electrical Engineering University of South ChinaHengyang 421001China College of Physics and Optoelectronics Taiyuan University of TechnologyTaiyuan 030024China Ningxia Hui Autonomous Region Screen Display Organic Materials Engineering Technology Research Center Ningxia Sinostar Display Material Co.Ltd.Yinchuan 750003China Organic Semiconductor Centre EaStCHEM School of ChemistryUniversity of St AndrewsFife KY169STUK Key Laboratory of Photonics Technology for Information School of Electronic and Information Engineering Xi’an Jiaotong UniversityXi’an 710049China

Although doped hole-transport materials(HTMs)off er an effi ciency benefi t for perovskite solar cells(PSCs),they inevi-tably diminish the ***,we describe the use of various chlorinated small molecules,specifi cally fl uorenone-triphenylamine(FO-TPA)-x-Cl[x=para,meta,and ortho(p,m,and o)],with diff erent chlorine-substituent positions,as dopant-free HTMs for *** chlorinated molecules feature a symmetrical donor-acceptor-donor structure and ideal intramolecular charge transfer properties,allowing for self-doping and the establishment of built-in potentials for improving charge *** effi cient hole-transfer interfaces are constructed between perovskites and these HTMs by strategi-cally modifying the chlorine ***,the chlorinated HTM-derived inverted PSCs exhibited superior effi ciencies and air ***,the dopant-free HTM FO-TPA-o-Cl not only attains a power conversion effi ciency of 20.82% but also demonstrates exceptional stability,retaining 93.8%of its initial effi ciency even after a 30-day aging test conducted under ambient air conditions in PSCs without *** fi ndings underscore the critical role of chlorine-substituent regulation in HTMs in ensuring the formation and maintenance of effi cient and stable PSCs.

关键词： Hole-transport materials Inverted perovskite solar cells Chlorinated small molecules Donor–acceptor–donor structure

来源：评论

学校读者我要写书评

暂无评论

Organic Memristor Based on High Planar Cyanostilbene/Polymer Composite Films

引用

Chemical Research in Chinese Universities 2023年第1期39卷 121-126页

作者： ZHAO Jinjin LI Wei WANG Xuechen WEI Xiao ZHU Huiwen QU Wenshan MEN Dandan GAO Zhixiang WEI Bin GAO Hanfei WU Yuchen Department of Physics Shanxi Datong UniversityDatong037009P.R.China Key Laboratory of Bio-inspired Materials and Interfacial Science Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing100190P.R.China Ji Hua Laboratory Foshan528000P.R.China Shanxi Province Key Laboratory of Microstructure Electromagnetic Functional Materials Institute of Solid State PhysicsShanxi Datong UniversityDatong037009P.R.China School of Chemistry and Chemical Engineering Shanxi Datong UniversityDatong037009P.R.China Key Laboratory of Advanced Display and System Applications Ministry of EducationSchool of Mechatronic Engineering and AutomationShanghai UniversityShanghai200072P.R.China

Organic memristors with low power consumption,fast write/erasure speed,and complementary metal-oxide-semiconductor(CMOS)compatibility have attracted tremendous attention to mimic biological synapses to realize neuromorphic computation in recent *** this paper,organic resistive switching memory(ORSM)based on(Z)-3-(naphthalen-2-yl)-2-(4-nitrophenyl)acrylonitrile(NNA)and polymer poly(N-vinylcarbazole)(PVK)composite film was prepared by spin-coating *** performance based on NNA:PVK composite films with different mass fractions of NNA were systematically *** ORSM based on PVK:40%(mass fraction)NNA composite film exhibited non-volatile and bipolar memory properties with a switching ratio(Ion/Ioff)of 24.1,endurance of 68 times and retention time of 104 s,a“SET”voltage(Vset)of−0.55 V and a“RESET”voltage(Vreset)of 2.35 *** resistive switching was ascribed to the filling and vacant process of the charge traps induced by NNA and the inherent traps in PVK *** holes trapping and de-trapping process occurred when the device was applied with a negative or positive bias,which caused the transforming of the conductive way of charges,that is the resistive behaviors in the *** study provides a promising platform for the fabrication of ORSM with high performance.

关键词： Organic memristor Resistive switching Polymer/molecule composite film

来源：评论

学校读者我要写书评

暂无评论

High-Performance Spiro Bifluoren-Based Charge Generation Layer for the Efficient and Thermal-Stability Organic Light-Emitting Diodes

SSRN

引用

SSRN 2025年

作者： Xu, Yachen Zhou, Qi Li, Chunya Wu, Ranghui Shi, Wei Lin, Yang Lan, Weixia Wei, Bin School of Mechatronic Engineering and Automation Shanghai University Shanghai200444 China Shanghai Engineering Research Center for Integrated Circuits and Advanced Display Materials Shanghai University Shanghai200072 China Key Laboratory of Advanced Display and System Applications Ministry of Education Shanghai University Shanghai200072 China

We have designed and synthesized 2-(9,9'-spirobi[fluoren]-2-yl)-1,10-phenanthroline (SBFPA) and investigated its optoelectrical and thermal characteristics to apply it as a charge generation layer (CGL). The SBFPA-engaged CGL in tandem organic light-emitting diodes (OLEDs) could efficiently generate and balance the injection of carriers. The current efficiency of the tandem red phosphorous OLED reached 31.2 cd/A at a luminance of 10,000 cd/m², which is 2.7 times that of the single OLED (11.6 cd/A). The decomposition temperature of SBFPA was as high as 342 ℃, which guaranteed the thermal stability of the tandem OLED. Moreover, the T95 lifetime (time to 95% of the initial luminance) of the tandem OLED reached 229 h. The charge generation ability of CGL was confirmed through a p-i-n-CGL-structured OLED, where CGL was inserted between the electron injection layer and the cathode to work as the source of electron generation. The maximum power efficiency of the OLED increased 30.9% to 10.46 lm/W, and the maximum luminescence enhanced 41.5% to 23925 cd/m2 compared to the OLED without CGL. The results highlight the promising application of the developed CGL in tandem OLED, offering new possibilities for development of reliable electronics. © 2025, The Authors. All rights reserved.

关键词： Organic light emitting diodes (OLED)

来源：评论

学校读者我要写书评

暂无评论

Analysis and Research Based on Electrohydrodynamic Inkjet Printing

Analysis and Research Based on Electrohydrodynamic Inkjet Pr...

引用

China International Forum o Solid State Lighting: International Forum on Wide Bandgap Semiconductors China (SSLChina: IFWS)

作者： Zhaoyu Chen Xinyi Wang Luqiao Yin Jianhua Zhang School of Microelectronics Shanghai University Shanghai China Key Laboratory of Advanced Display and System Applications Shanghai University Ministry of Education Shanghai China School of Microelectronics Shanghai Key Laboratory of Chips and Systems for Intelligent Connected Vehicle Shanghai University China

ISBN: (数字)9798331541149

ISBN: (纸本)9798331541156

Electrohydrodynamic (EHD) inkjet printing has the advantages of high precision and high automation, and its forming mechanism is complex. In this paper, the stress of Taylor cone and its influencing factors were analyzed systematically, and explored the influence of different process parameters on the printing process and effect. The results showed that the larger the voltage, the larger the droplet; the longer the cycle and voltage duration, the larger the droplet; the droplet size was linear with voltage and period. The influence of the printing height on the droplet size was very obvious. Excessive voltage made the printing process very unstable and inaccurate, and the droplet size gap was large and the droplet printing position deviated. Hope to provide some ideas for related research.

关键词： Automation Photonic band gap Voltage Ink jet printing Electrostatics Electrohydrodynamics Stress

来源：评论

学校读者我要写书评

暂无评论

Eco-friendly and degradable red phosphorus nanoparticles for rapid microbial sterilization under visible light

引用

Journal of Materials Science & Technology 2021年第8期67卷 70-79页

作者： Qian Wu Xiangmei Liu Bo Li Lei Tan Yong Han Zhaoyang Li Yanqin Liang Zhenduo Cui Shengli Zhu Shuilin Wu Yufeng Zheng Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials Hubei Key Laboratory of Polymer MaterialsSchool of Materials Science&EngineeringHubei UniversityWuhan 430062China State Key Laboratory for Mechanical Behavior of Materials School of Materials Science and Engineering.Xi'an Jiaotong UniversityXi'an710049China School of Materials Science&Engineering the Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of ChinaTianjin UniversityTianjin 300072China State Key Laboratory for Turbulence and Complex System and Department of Materials Science and Engineering College of EngineeringPeking UniversityBeijing 100871China

Pathogens pose a serious challenge to environmental sanitation and a threat to public *** frequent use of chemicals for sterilization in recent years has not only caused secondary damage to the environment but also increased pathogen resistance to drugs,which further threatens public *** address this issue,the use of non-chemical antibacterial means has become a new trend for environmental *** this study,we developed red phosphorus nanoparticles(RPNPs),a safe and degradable photosensitive material with good photocatalytic and photothermal *** red phosphorus nanoparticles were prepared using a template method and *** the irradiation of simulated sunlight for 20 min,the RPNPs exhibited an efficiency of 99.98%in killing Staphylococcus aureus due to their excellent photocatalytic and photothermal *** electron microscopy and ultraviolet–visible spectroscopy revealed that the RPNPs exhibited degradability within eight *** the RPNPs and their degradation products were nontoxic to fibroblast ***,such RPNPs are expected to be used as a new type of low-cost,efficient,degradable,biocompatible,and eco-friendly photosensitive material for environmental disinfection.

关键词： Antibacterial Photocatalytic Photothermal Red phosphorus Photosensitive Nanoparticles

来源：评论

学校读者我要写书评

暂无评论

Photoresponses Improvement of ZnO Thin Film Transistor by Using a HfO2-Al2O3Double Dielectrics 21

Photoresponses Improvement of ZnO Thin Film Transistor by Us...

引用

21st International Conference on Electronic Packaging Technology, ICEPT 2020

作者： Che, Bowen Zhang, Yongpeng DIng, Xingwei Key Laboratory of Advanced Display and System Application Ministry of Education School of Mechatronics and Automation Shanghai University Shanghai China

ISBN: (纸本)9781728168265

In this work, we have fabricated two bottom-gate zinc oxide thin film transistors (TFTs) with single-layer HfO2 and double-layer HfO2-Al2O3 dielectrics by atomic layer deposition (ALD). The TFT with HfO2-Al2O3 dielectric exhibited better electrical characteristics, such as a higher field effect mobility of 6.1 cm2/V•s and a lower subthreshold swing of 0.124 V/decade. At the same time, the optical properties is also improved significantly with larger responsivity (6.05 A/W) and UV-to-visible rejection ratio (6.05×104). These results are attributed to lower interface trap states between channel layer and dielectric layer by an Al2O3 interlayer. © 2020 IEEE.

关键词： Atomic layer deposition

来源：评论

学校读者我要写书评

暂无评论

Solution-Processed Ta Doped Heterojunction Structure Ito/Zto Thin Film and application for High Electrical and Stable Tfts

SSRN

引用

SSRN 2023年

作者： Huang, Chuanxin Ding, Xingwei Liu, Yunyun Gao, Ju School of Opto-Electronic Engineering Zaozhuang University Zaozhuang277160 China Key Laboratory of Advanced Display and System Applications Ministry of Education Shanghai University Shanghai200072 China

Here, the solution-processed heterojunction structure Ta doped ZnSnO/InSnO (TaZTO/ITO) semiconductor thin film and TFTs have been fabricated on ALD deposited Al2O3. The effects of Ta doping on the structure, thickness, thermal decomposition, contact angle, surface morphology, transmittance, chemical bond states and electrical characteristics of ZTO front layer have been investigated by glancing angle X-ray diffraction (GAXRD), cross sectional transmission electron microscopy (HRTEM), thermogravimetric analysis (TGA), contact angle meter, atomic force microscopy spectrometer (AFM), X-ray photoelectron spectroscopy (XPS) and semiconductor characterization system, respectively. Moreover, the influence of Ta doping in the electrical property and stability of heterojunction structure TaZTO/ITO TFTs has been also analyzed. A proper Ta concentration in the TaZTO back-channel layer can realize stable, dense film and good electrical and stable heterojunction structure TFTs due to inhibiting the generation of defects originated from oxygen vacancies. The heterojunction structure TaZTO/ITO TFTs with the Ta doping of 1%mol shows the best electrical property with the mobility of 4.72 cm2/Vs and the best stability with the threshold voltage shift of 0.95 V under positive bias stress. The strategy has coordinated the relationship between µ and stability effectively, and provide a new way for the development of oxide TFTs technology in the future. © 2023, The Authors. All rights reserved.

关键词： X ray photoelectron spectroscopy

来源：评论

学校读者我要写书评

暂无评论

The enhanced photocatalytic sterilization of MOF-Based nanohybrid for rapid and portable therapy of bacteria-infected open wounds

引用

Bioactive Materials 2022年第7期7卷 200-211页

作者： Chaofeng Wang Yue Luo Xiangmei Liu Zhenduo Cui Yufeng Zheng Yanqin Liang Zhaoyang Li Shengli Zhu Jie Lei Xiaobo Feng Shuilin Wu Biomedical Materials Engineering Research Center Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and MinistryHubei Key Laboratory of Polymer MaterialsMinistry-of-Education Key Laboratory for the Green Preparation and Application of Functional MaterialsSchool of Materials Science&EngineeringHubei UniversityWuhan 430062China School of Life Science and Health Engineering Hebei University of TechnologyXiping Avenue 5340Beichen DistrictTianjin 300401China School of Materials Science&Engineering The Key Laboratory of Advanced Ceramics and Machining Technology by the Ministry of Education of ChinaTianjin UniversityTianjin 300072PR China School of Materials Science&Engineering State Key Laboratory for Turbulence and Complex SystemPeking UniversityBeijing 100871China Department of Orthopaedics Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430022PR China

Open wounds are prone to infection and difficult to heal,which even threatens the life of patients because bacterial infections can induce other lethal complications without prompt *** commonly used antibiotics treatment for bacterial infections has been reported to cause globally bacterial resistance and even the occurrence of *** highly effective and antibiotic-independent therapeutic strategies are urgently needed for treating various kinds of bacteria-infected *** this work,we synthesized an eco-friendly nanohybrid material(ZnDMZ)consisting of a kind of biodegradable metal organic framework(MOF,ZIF-8)combined with Zn-doped MoS_(2)(Zn-MoS_(2))nanosheets,which exhibited great ability to kill bacteria and promote the healing of bacteria-infected wounds under 660 nm light *** underlying mechanism is that besides the local hyperthermia,the nanohybrid material exhibits enhanced photocatalytic performance than single component in it,i.e.,it can also be excited by 660 nm light to produce more oxygen radical species(ROS)due to the following *** one hand,the Zn doping can reduce the work function and the band gap of MoS_(2),which promotes the movement of photoexcited electrons to the surface of the *** the other hand,the combination between Zn-MoS_(2) and MOF induces the formation of a built-in electric field due to their work function difference,thus accelerating the separation of photoexcited electron-hole *** of the synergy of photocatalytic effect,photothermal effect and the released Zn ions,the synthesized ZnDMZ possessed a highly effective antibacterial efficacy of 99.9%against Staphylococcus aureus under 660 nm light irradiation for 20 min without *** vivo tests showed that this nanohybrid material promoted the wound healing due to the released Zn *** nanohybrid will be promising for rapid and portable treatment of bacteria-infected open wounds in pathogenic bacteria contaminated

关键词： Antibacterial Wound healing Bacterial infection MOF Photocatalytic

来源：评论

学校读者我要写书评

暂无评论

Simultaneous Improvement of Efficiency and Stability of Organic Light-Emitting Diodes Utilizing Bilayered Hole-Injection Layer Composed of Vanadium Oxide and Pedot:Pss

SSRN

引用

SSRN 2024年

作者： Zhang, Han Zhu, Wenqing Wu, Ming Feng, Zhiyin Huang, Lu Chen, Yipeng Dong, Yijie Yang, Yue School of Materials Science and Engineering Shanghai University 99 Shangda Road Shanghai200444 China Key Laboratory of Advanced Display and System Applications Ministry of Education Shanghai University 149 Yanchang Road Shanghai200072 China

The poor hole-injection and consequent carrier imbalance are regarded to be important factors that seriously restricts the device performance of organic light-emitting diodes (OLEDs). In this work, a solution-processable inorganic/organic bilayer composed of vanadium oxide (VOx)/poly(3,4-ethylenedioxythiophene):poly-(styrene sulfonate) (PEDOT:PSS) is reported as a hole-injection layer (HIL) in OLED to customize matched interfacial energy level alignment. This strategy not only facilitates the formation of a smooth PEDOT:PSS overlayer in the VOx/PEDOT:PSS bilayer, but also enhances the hole-injection across the interface through the construction of step-wise energy levels and hence improves carrier balance in device. Consequently, it was found that the device with VOx/PEODT:PSS bilayered HIL exhibited a maximum current efficiency of 67.23 cd A-1 and a maximum external quantum efficiency of 19.17%, which were obviously superior to those of the reference devices with individual VOx HIL (54.85 cd A-1, and 15.58%, respectively) and PEDOT:PSS HIL (58.74 cd A-1, and 16.84%, respectively). Meanwhile, the stability of bilayered HIL-based device was improved substantially because the stable VOx layer effectively prevented the corrosion of indium tin oxide (ITO) anode by acidic PEDOT:*** study highlights a promising bilayer for developing high-performance OLEDs. © 2024, The Authors. All rights reserved.

关键词： Tin oxides

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：