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The impact of solvent and modifier on ZnO thin-film transistors fabricated by sol-gel process

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Science China(Technological Sciences) 2014年第11期57卷 2153-2160页

作者： DONG YinMao tang dongyan LI ChenSha School of Sciences/Beijing Key Lab of Plant Resource Research and Development Beijing Technology and Business University School of Chemical Engineering and Technology Harbin Institute of Technology Department of Mechanical Engineering Tsinghua University

Techniques for fabricating solution-processed zinc oxide(ZnO)-based thin-film transistors(TFTs)are feasible with solution using various ***,ZnO TFTs were fabricated via sol-gel method using zinc acetate as the starting reagent with different modifiers and *** ZnO thin-film semiconductors with well-controlled,preferential crystal orientation and densely packed ZnO crystals can be prepared with the optimized fabrication conditions,exhibiting excellent field-effect far exceeding those of hydrogenated amorphous silicon(a-Si:H).However,the field-effect characteristics of ZnO TFTs were different for different precursor systems which were constituted by zinc acetate,modifiers and *** co-modification of acetoin and monoethanolamine for the precursor system exhibited higher extent of crystal orientation and *** maximum mobility of 7.65 cm2V-1s-1 and current on-to-off ratio of^105–106 have been obtained.

关键词： thin-film transistor semiconductor zinc oxide sol-gel solution-process crystallization

Preparation,Morphology and Damping Property of PU/UP Interpenetrating Polymer Networks

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Journal of Materials Science & Technology 2005年第4期21卷 585-588页

作者： dongyan tang Liangsheng QIANG Zheng JIN Liancheng ZHAO Department of Applied Chemistry Harbin Institute of Technology Harbin 150001 China School of Materials Science and Engineering Harbin Institute of Technology Harbin 150001 China

Interpenetrating polymer networks （IPNs） composed of acrylate-modified polyurethane （PU）/unsaturated polyester （UP） resin via simultaneous polymerization with various component ratios of PU/UP were prepared. The polymerization processes of IPNs were traced through infrared spectrum （IR） techniques, by which the phase separation in systems could be controlled effectively. Results for the morphology and miscibility among multiple phases of IPNs, obtained by transmission electron microscope （TEM） indicated that the domains between two phases were constricted in nanometer scales. The dynamic mechanical thermal analyzer （DMTA） detection results revealed that the loss factor （tanS） and loss modulus （E″） increased with the polyurethane amounts in system, and the peak value in curves of tanδ and E″ appeared toward low temperature ranges. Maximum tanδ values of all samples were above 0.3 in the nearly 50℃ ranges. Also, the mechanical properties of PU/UP IPNs were studied in detail.

关键词： Interpenetrating polymer networks (IPNs) Nanocomposites Damping property Morphology

Self-cleaning SERS sensor based on flexible Ni_(3)S_(2)/MoS_(2)@Ag@PDMS composites for label-free multiplex volatile organic compounds detection

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Nano Research 2024年第6期17卷 5529-5539页

作者： Xinyue Song Yongzheng Zhang Xiaohui Ren dongyan tang Xuelin Zhang Xin Li MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringState Key Lab of Urban Water Resource and EnvironmentHarbin Institute of TechnologyHarbin 150090China College of Textile and Clothing Yancheng Institute of TechnologyYancheng 224051China MEMS Center Harbin Institute of TechnologyHarbin 150001China

Flexible self-cleaning surface-enhanced Raman scattering(SERS)sensors are highly desirable for the detection of various environmental pollutants,including volatile organic compounds(VOCs).However,achieving sensitive detection without labeling and ensuring efficient cyclic use remain significant ***,we introduce a direct approach to create a versatile Ni_(3)S_(2)/MoS_(2)@Ag@PDMS(PDMS=polydimethylsiloxane)composite SERS substrate using chemical vapor deposition *** produced substrate shows outstanding performance,offering extremely low detection sensitivity(1.0×10^(−12)M 4-aminobenzenethiol)and high enhancement factors(approximately 107).The interactions between the rod-shaped Ni_(3)S_(2)/MoS_(2)@Ag heterostructure and the molecules facilitate the transfer of charge,resulting in an increased electric field enhancement of the exciton *** has the dual benefit of providing a self-cleaning effect and enhancing SERS ***,the substrate enables sensitive detection of VOCs gas molecules without the need for labels,achieving a minimum detectable concentration as low as 1 ppm for o-dichlorobenzene,due to the preconcentration effect of *** calculations further explain the combined effect of electromagnetic and chemical enhancement in this composite *** utilizing the developed visual SERS barcode,quick multiple detection and analysis of mixtures can be *** flexible and versatile SERS technique has significant potential for on-site detection and analysis of environmental pollutants,opening the doors for the development of a wearable in-situ SERS sensing platform.

关键词： surface-enhanced Raman scattering(SERS) quantitative detection recyclable detection volatile organic compounds(VOCs) chemical vapor deposition(CVD)

Study on Polyurethane/(vinyl ester resin) IPN Damping Materials

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Journal of Materials Science & Technology 2003年第z1期19卷 56-58页

作者： Chuanli QIN dongyan tang Jun CAI Jusheng.ZHANG Weimin CAI Xiaodong SUN Department of Environmental Science and Engineering Harbin Institute of Technology Harbin 150001 China Department of Applied Chemistry Harbin Institute of Technology Harbin 150001 China Department of Environmental Science and Engineering Harbin Institute of Technology Harbin 150001 China Department of Applied Chemistry Harbin Institute of Technology Harbin 150001 China Department of Environmental Science and Engineering Harbin Institute of Technology Harbin 150001 China Department of Environmental Science and Engineering Shanghai Jiaotong University Shanghai 200030 China The Army Representative Agency in 674 Factory State-Owned Harbin 151005 China

Polyurethane/(vinyl ester resin) interpenetrating polymer network (PU/VER IPN) materials with broad temperatureranges and excellent damping properties from Iow temperature to room temperature were prepared. The influenceof comonomers and component ratios on the compatibility and damping properties of IPN materials was studied byDMA which indicates that such properties are improved by introducing acrylic esters instead of polystyrene (PSt)into VER comonomer system. The detected results of microstructure by AFM show that the phase ranges of thedual-phase continuous IPN materials obtained are both in nanometer scale. The results of mechanical propertiesshow that IPN materials show the regulation from elastic deformation to brittle deformation with the increase of VERproportion.

关键词： Interpenetrating polymer network, Vinyl ester resin, Damping materials, Compatibility

CONDUCTIVITY AND DIELECTRIC BEHAVIOR OF PLiAMPS-BASED SEMI-IPN SINGLE ION CONDUCTOR PLASTICIZED WITH POLY(SILOXANE-G-ETHYLENE OXIDE)

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Journal of Advanced Dielectrics 2012年第3期2卷 73-81页

作者： EIWEI CUI dongyan tang Department of Chemistry School of Science Harbin Institute of TechnologyHarbin 150001China College of Materials Science and Engineering Harbin University of Science and TechnologyHarbin 150040China

Comb poly(siloxane-g-ethylene oxide)(PSi-PE)with high chain segmental mobility,as a plasticizer,was introduced into poly(lithium 2-acrylamido-2-methyl-1-propanesulfonate)(PLiAMPS)-based semi-interpenetrating polymer network single-ion *** structures of PSi-PE and PLiAMPS were characterized by FTIR *** distribution of PSi-PE in polyelectrolyte matrix was investigated through observing the residual surface morphology of conductor membrane after being etched by *** impedance and dielectric behavior measurements were used to investigate the impact of PSi-PE on the ionic conductivity and to analyze the mechanism of conductivity *** with the unplasticized membranes,the ionic conductivity of the membrane with the addition of 35 wt.%PSi-PE was improved by 20 ***,the dielectric constant(ε)of the membrane was increased to 1330 and the relaxation time was decreased to 0.012 *** changes of dielectric properties reflect directly the effect of PSi-PE on the dissociation ability of Liþand the chain segmental mobility,which well explains the reasons of ionic conductivity variation.

关键词： Poly(siloxane-g-ethylene oxide) lithium 2-acrylamido-2-methyl-1-propanesulfonate(LiAMPS) single-ion conductor ionic conductivity dielectric behavior

The Influence Factors Analysis to Improve the Compatibility and the Mechanical Behavior of IPN, Gradient IPN and BaTiO<sub>3</sub>Filled IPN

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Materials Sciences and Applications 2012年第9期3卷 606-611页

作者： Yudi Guo dongyan tang Ying Wang Department of Chemistry Harbin Institute of Technology Harbin China

Interpenetrating polymer network (IPN), gradient IPN and BaTiO3 filled IPN, composed of poly(ethylene glycol urethane) (PEGPU) and unsaturated polyester resin (UP) curing at room temperatures were prepared. Then the effect of soft/hard segment ratio in polyurethane (PU), component ratio of PU to UP in IPN, adding amount of BaTiO3 in filled IPN, the component sequences and interval times between each IPN for gradient IPN, on morphology and mechanical behavior of IPN and BaTiO3/IPN nanocomposites with different molecular weight of PU were studied systematically. Moreover, the investigation on the relationship between the morphologies and the mechanical properties indicated that the IPN with finer morphology exhibited an excellent consistency of the higher strengths and elongations.

关键词： Poly(ethylene Glycol Urethane) (PEGPU) Gradient Interpenetrating Polymer Networks (Gradient IPN) BaTiO3 Morphology Mechanical Property

Interfacial Actions and Adherence of an Interpenetrating Polymer Network Thin Film on Aluminum Substrate

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Journal of Surface Engineered Materials and Advanced Technology 2011年第3期1卷 89-94页

作者： Weiwei Cui dongyan tang Jie Liu Fan Yang 不详

The interpenetrating polymer networks (IPN) thin film with the –C=O group in one network and the terminal –N=C=O group in another network on an aluminum substrate to reinforce the adherence between IPN and aluminum through interfacial reactions, were obtained by dip-pulling the pretreated aluminum substrate into the viscous-controlled IPN precursors and by the following thinning treatment to the IPN film to a suitable thickness. The interfacial actions and the adhesion strengths of the IPN on the pretreated aluminum substrate were investigated by the X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR) and strain-stress(?-?) measurements. The XPS and FTIR detection results indicated that the elements’ contents of N, O, and Al varied from the depths of IPN. The in-terfacial reaction occurred between the –N=C=O group of IPN and the AlO(OH) of pretreated aluminum. The in-creased force constant for –C=O double bond and the lower frequency shift of –C=O stretching vibration absorption peak both verified the formation of hydrogen bond between the –OH group in AlO(OH) and the –C=O group in IPN. The adherence detections indicated that the larger amount of –N=C=O group in the IPN, the higher shear strengths between the IPN thin film and the aluminum substrate.

关键词： Interfacial Action Adherence Interpenetrating Polymer Network (IPN) Aluminum Thin Film

Surfactant sodium dodecyl benzene sulfonate improves the efficiency and stability of air-processed perovskite solar cells with negligible hysteresis

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Surfactant sodium dodecyl benzene sulfonate improves the eff...

乞讨虚无:《祝福》与鲁迅生存困境的自我体认

第八届新型太阳能材料科学与技术学术研讨会

作者： Wenyuan Zhang Lang He dongyan tang Xin Li Harbin Institute of Technology

The device performance of organic-inorganic hybrid halide perovskite solar cells(PSCs) is highly dependent on the quality of perovskite layer. In this work, we report a multifunctional chemical additive strategy to simultaneously improve the efficiency and stability of fully air-processed PSCs. The planner methylammonium lead trihalide(MAPbI3)-based PSCs incorporating sodium dodecyl benzene sulfonate(SDBS) exhibit a champion power conversion efficiency(PCE) of 19.20% and negligible hysteresis, which is one of the top efficiencies of MAPbI3-based PSCs made in air. The increased efficiency is due to the reduction of defects and inhibition of ion migration in the perovskite films. Furthermore, the enhancement of device performance and stability can also ascribe to highly preferred perovskite crystals and efficient protecting the perovskite films from humidity. The corresponding unencapsulated device retains 92.34% of its initial efficiency after 90 days(> 2100 h) storage in air and maintains 85.20% of its original PCE after exposing to 85°C for 27 h. Our results indicate that SDBS is a promising chemical additive to enhance the performance of air-processed PSCs for future real-application.

关键词： perovskite solar cells multifunctional sodium dodecyl benzene sulfonate chemical additive ambient air

来源： cnki会议评论

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东岳论丛 2011年第1期32卷 79-82页

作者：唐东堰湖南师范大学湖南长沙410081

以往的《祝福》研究大多忽视了一个基本的事实,即直接促使祥林嫂死亡的,按照文本的暗示,应该是"灵魂有无的问题"。"灵魂有无的问题"或者"生命意义问题"在鲁迅1924-1925年间文学创作中反复出现,它背后隐藏着鲁迅深重的危机感。鲁迅正是... 详细信息

以往的《祝福》研究大多忽视了一个基本的事实,即直接促使祥林嫂死亡的,按照文本的暗示,应该是"灵魂有无的问题"。"灵魂有无的问题"或者"生命意义问题"在鲁迅1924-1925年间文学创作中反复出现,它背后隐藏着鲁迅深重的危机感。鲁迅正是借助祥林嫂的悲剧传达出了他本人对生存的独特体验和对自我精神困境的体认,并试图寻找摆脱生存困境的精神出路。《祝福》的重新解读对于理解《野草》具有重要的意义。

关键词：鲁迅《祝福》《野草》精神困境