喷涂热分解法制备SnO2·F薄膜及其光电性能研究

以SnCl₄·5H₂O和NH₄F为原料,用喷涂热分解法在石英玻璃上制备SnO₂·F薄膜。采用X光电子能谱分析仪(XPS)和X光衍射仪(XRD)分别表征SnO₂·F薄膜的成分和晶体结构,研究了F^-的掺杂量和热处理对薄膜方块电阻、可见光区透射率和红外光区反射率的影响。实验结果表明,用本次实验的配方,衬底温度TS大致450℃,喷涂时间为15s时,薄膜的方块电阻R_□为0.2~4kΩ/□,可见光透过率达T≈80%和红外光反射率R≈80%以上。样品在O₂及N₂气氛中进行一定温度范围的退火处理后,其电阻率上升。     

压强对直流磁控溅射TiN薄膜光学性能的影响

使用直流磁控溅射设备,不同压强下在玻璃衬底上制备了系列TiN薄膜.采用紫外-可见光分光光度仪测试了样品的光学性能,采用四探针法测量了样品的方块电阻.研究了溅射沉积过程中压强对TiN薄膜光学性能的影响.结果表明,随着反应压强的增大,TiN薄膜在可见光区透射率增强,反射率降低;薄膜厚度减小,方块电阻增大,中远红外光区的反射率降低.     

溶胶凝胶法制备Sb掺杂SnO2透明导电膜的结构与性能研究

在乙醇溶剂中,以无机金属盐SnCl2.2H2O和SbCl3为原料,采用溶胶-凝胶法制备了Sb掺杂的SnO2透明导电薄膜(ATO),研究了Sb掺杂量和热处理温度对薄膜结构和性能的影响。结果表明,热处理温度为500℃、Sb掺杂摩尔百分比为15%～20%时,薄膜具有较好的结晶性能、好的导电性能、较高的可见光区透射率和红外光区反射率。     

氧化铟锡薄膜材料制备及其光电特性研究

采用溶胶-凝胶旋转涂膜法,以InCl3·4H2O和SnCl4·5H2O为前驱物在玻璃基片上制备了氧化铟锡(ITO)薄膜材料,研究掺锡浓度、涂膜层数、热处理温度和热处理时间等工艺条件对ITO薄膜光电特性的影响.实验结果表明,ITO薄膜的方块电阻和可见光透射率都与掺锡浓度、涂膜层数、热处理温度和时间等因素有关,最佳参数为锡掺杂量12wt%,热处理温度和时间分别为450℃和1h,薄膜层数为6层.最佳ITO薄膜的方块电阻为185Ω/□,可见光平均透射率为91.25%.     

ZnO:Al(ZAO)薄膜的特性研究

用直流磁控反应溅射技术制备了综合性能优良的ZnO:Al(ZAO)薄膜.X光衍射(XRD)、光电子能谱(XPS)和Auger电子能谱(AES)等分析结果表明,适量的铝掺杂和氧流量可有效地控制Al2O3相的生成.铝在薄膜表面的存在形式单一,并且Zn,O,Al各元素纵向分布均匀.理论与实验研究表明,对于高度简并的ZAO半导体薄膜,在温度较低时,离化杂质散射占主导地位;温度较高时,晶格振动散射将成为主要的散射机制;晶界散射仅当晶粒尺寸较小(与电子的平均自由程相当)时才起作用.此外,优化工艺参数可获得低电阻率(～5×10-4Ωcm)的ZAO薄膜.在可见光区,其透射率＞80%;在近中红外光区,其反射率＞60%.     

SnO_2∶(Sb,In)透明导电薄膜的制备及其性能研究

采用溶胶凝胶(Sol-Gel)技术制备了SnO2∶(Sb,In)薄膜,优化了制备工艺参数,应用差示扫描量热仪-热重分析仪(DSC-TGA)、X射线衍射仪(XRD)等手段对薄膜进行了表征.结果表明,氯化亚锡、乙醇和水摩尔比为1∶20∶4时成胶状态最佳,当锑和铟的掺杂量分别为7%和4%时,在500℃氮、氢混合气氛下煅烧2 h制备的薄膜表面平整,方块电阻大约为40.5Ω,紫外-可见光透射率达88%.     

SnO2:(Sb,In)透明导电薄膜的制备及其性能研究

采用溶胶凝胶(Sol-Gel)技术制备了SnO2∶(Sb,In)薄膜,优化了制备工艺参数,应用差示扫描量热仪-热重分析仪(DSC-TGA)、X射线衍射仪(XRD)等手段对薄膜进行了表征.结果表明,氯化亚锡、乙醇和水摩尔比为1∶20∶4时成胶状态最佳,当锑和铟的掺杂量分别为7 %和4 %时,在500 ℃氮、氢混合气氛下煅烧2 h制备的薄膜表面平整,方块电阻大约为40.5 Ω,紫外-可见光透射率达88 %.     

基体温度和氩气压强对射频磁控溅射制备GZO薄膜性能的影响

采用射频磁控溅射方法,用Ga2O3含量为1%的ZnO做靶材,在不同基体温度和不同溅射压强的条件下制备了高质量的GZO透明导电薄膜.结果表明:基体温度和氩气压强对GZO薄膜的晶体结构、光电性能有较大影响.当温度为500℃,溅射气压为0.2Pa时制备的GZO薄膜光电性能较优,方块电阻为7.8Ω/□,电阻率为8.58×10-4Ω.cm,可见光的平均透过率为89.1%.     

SnO2·X电热膜的制备和在家庭电暖气加热器中的应用

以SnCl4·5H2O为原料,真空溅射法制备SnO2·X电热膜。研究了元素搀杂量及镀膜温度对电阻及电阻温度特性的影响。家庭电暖气加热器的应用实验结果表明,SnO2·X膜热效率高,功率密度达到42W·cm-2.     

掺铝氧化锌透明导电薄膜生长及光电性质研究

采用磁控溅射在载玻片上制备掺铝氧化锌AZO透明导电薄膜,并用扫描电子显微镜观察薄膜的表面形貌,四探针电阻率测试仪测量样品的方块电阻和电阻率,分光光度计测量薄膜透射率.结果表明当功率、温度、氢气掺杂比为200 W、300℃、8%时,制备的AZO薄膜具有最小的方块电阻和电阻率,且在可见光区域内透射率均超过80%.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with