中频磁控溅射法制备氧化锌钇薄膜及其性能研究(英文)

利用中频磁控溅射法,溅射氧化锌钇(ZYO)陶瓷靶材,在玻璃基底上制备ZYO透明导电薄膜。研究了氧化钇掺杂量和基底温度对薄膜的结构、电学性能和光学性能的影响。结果表明,ZYO薄膜为钎锌矿型结构,呈c轴择优取向,平均可见光透过率(400～800nm)达到80%以上。制备的ZYO薄膜具有的最低电阻率为1.18×10-3Ωcm。     

基底对LaxCa1-xMnO3薄膜的影响

本文利用溶胶-凝胶法制备了LaxCa1-xMnO3薄膜,利用反射偏光显微镜和XRD对薄膜的结构和形貌进行了表征,研究了基底对薄膜的结构和形貌的影响。XRD结果表明薄膜均为钙钛矿结构,受基底的影响,晶格取向由（110）变为（220）;反射偏光显微图像结果显示受基底的影响薄膜样品表面形貌为八重对称的菊花状团簇。这说明制备LaxCa1-xMnO3过程中,基底与薄膜的点阵匹配是一个很大的影响因素。     

超微粒子－有机聚合物薄膜的研究

我们用离子团束－飞行时间质谱（ＩＣＢ－ＴｏＦＭＳ）系统制备了金（Ａｕ）超微粒子－聚乙烯（ＰＥ）薄膜和Ｃ＿（６０）－聚乙烯薄膜。用透射电子显微镜（ＴＥＭ）分析了所制备的样品。它们的结构是Ａｕ超徽粒子镶嵌在多晶的ＰＥ薄膜中，其中Ａｕ原子团呈球形，直径分布在２．０－５．０ｎｍ窄范围内，当沉积基底温度为９０℃时，Ａｕ原子团相互靠近，几乎连接起来，但仍保持原来大小。基底温度为１４０℃蒸积的Ｃ＿（６０）－ｐＥ薄膜具有晶态结构，其晶格常数为１．４５４ｎｍ。     

超微粒子—有机聚合物薄膜的研究

我们用离子团束－飞行时间质谱（ＩＣＢ－ＴＯＦＭＳ）系统制备了金（Ａｕ）超微粒子－聚乙烯（ＰＥ）薄膜和Ｃ６０－聚乙烯薄膜。用透射电子显微镜（ＴＥＭ）分析了所制备的样品。它们的结构是Ａｕ超微粒子镶嵌在多晶的ＰＥ薄膜中，其中Ａｕ原子团呈球形，直径分布在２．０－５．０ｎｍ窄范围内，当沉积基底温度为９０℃时，Ａｕ原子团相互靠近，几乎连接起来，但仍保持原来大小。基底温度为１４０℃蒸积的Ｃ６０－ＰＥ薄膜具有晶态     

纯相SnO2纳米晶薄膜的一步电沉积制备及其结构与光电性能研究

采用一步电沉积在氧化铟锡（ITO）导电玻璃基底上制备纯相SnO₂纳米晶薄膜材料,通过改变沉积条件,研究沉积电位、镀液温度和HNO₃浓度对薄膜组成结构的影响。结果表明：当沉积电位为-0.9 V（vs.SCE）,镀液温度为65℃,HNO₃浓度为50 mmol/L时,所制备的SnO₂纳米晶薄膜为纯相金红石型结构,且薄膜相对连续致密。光电性能测试表明,该薄膜具有优异的光电性能,在可见光区透光率大于90%,带隙为3.75 eV,且电阻率为2.2×10^-3 Ω·cm,载流子浓度为1.9×10²⁰ cm^-3,载流子迁移率为14.8 cm²/（V·s）。故所制备的SnO₂纳米晶薄膜是太阳能电池的理想窗口层材料。     

退火温度对磁控溅射Ti02薄膜结构及性能的影响

采用对向靶磁控溅射法在FTO导电玻璃基底上制备了Ti02薄膜,分别在450℃、500℃和550℃条件下对Ti02薄膜进行退火处理;利用X射线衍射（XRD）和扫描电镜（SEM）测试手段分析了不同退火温度对TiO,薄膜晶体结构与表面形貌的影响以异丙醇（iso—propanol,IPA）为目标物,研究了所制备Ti02薄膜的光催化性能,并分析了该气相光催化反应机理．同时在氙灯照射下,测试了Ti02薄膜的光电流以分析其光电性能．结果表明：当退火温度由450℃升至550℃时,Ti02薄膜由纯锐钛矿结构转变为金红石与锐钛矿型混晶结构,其表面形貌则变化不大;Ti02薄膜光催化性能与光电性能均随退火温度的升高而提高,经550℃退火的Ti02薄膜可将IPA高效降解为丙酮和C02,其光电流可达0．7mA并保持稳定．     

基底温度对Ti/TiN薄膜内应力的影响研究

摘要：采用反应直流磁控溅射法,在硅基底上制备了一系列不同结构的Ti/TiN多层薄膜。采用X射线衍射仪（XRD）对薄膜物相进行了分析,研究了溅射沉积过程中基底温度对周期薄膜结构及内应力的影响.结果表明：多层薄膜中的Ti出现（101）面,TiN的（200）面衍射峰强度在基底温度为600℃时为最高。随着衬底温度的升高,薄膜内部的压应力逐渐减小,当基底温度在600℃时,薄膜内应力最小。     

偏压对类石墨非晶碳膜结构和机械性能的影响

采用高功率脉冲磁控溅射法在Si和高速钢基底上制备类石墨(Graphite-like carbon,GLC)非晶碳膜,研究了基底偏压对薄膜微观结构、机械性能和摩擦学性能的影响.结果表明:随着基底偏压的增大,GLC薄膜sp2键含量先减小后增大,在基底偏压为-100 V时达到最小值;薄膜的硬度和弹性模量先增大后减小,表面粗糙度先减小后增大;GLC薄膜的摩擦学性能与其机械性能和表面粗糙度密切相关,在基底偏压为-100 V时,薄膜的平均摩擦系数最小.     

基底偏压对磁控溅射沉积MoSi2薄膜结构及力学性能的影响

针对不同基底偏压下制备的MoSi_2薄膜呈现不同结构及性能的问题,采用直流磁控溅射工艺,在单晶硅表面制备了MoSi_2薄膜。采用X射线衍射仪、场发射扫描电镜、原子力显微镜和纳米压痕仪等分析手段,探究了基底偏压对磁控溅射沉积MoSi_2薄膜形貌结构、生长特性、组织和性能的影响。研究结果表明:不同基底偏压制备的薄膜主要为六方相MoSi_2,且存在明显的(111)面择优取向。基底偏压和基底温度的协同作用,使薄膜的自退火效应更加明显。随着基底偏压的增加,薄膜的结晶效果显著提高,并出现四方相MoSi_2和Mo_5Si_3相。基底偏压的增加使薄膜的厚度、弹性模量及纳米硬度先上升后下降。当基底偏压为-100 V时,薄膜的厚度、弹性模量及纳米硬度达到最大值,分别为1 440 nm、192.5 GPa和10.56 GPa。     

从废旧DVD光盘到电化学方法可控的SERS基底

表面增强拉曼散射（SERS）光谱是一种高灵敏的检测技术，但制备高活性和低成本的SERS基底仍然是一大挑战.采用低成本的商业数字视频光盘（DVD）作为载体，用电化学技术原位合成金-银（Ag-Au）复合纳米结构作为SERS基底.通过电化学粗糙化技术，无需添加硝酸银（AgNO₃）和四氯金酸（HAuCl₄）前驱体溶液，就可以在DVD光盘上的沟槽状金银反射层表面上得到Ag-Au轨道团簇形态.经过一系列表征和优化，研究了Ag-Au复合纳米结构的SERS性能.结果表明：这种DVD衍生的SERS基底对不同的拉曼探针分子均表现出优异的增强性能、高均匀性（相对标准偏差（RSD）为7.88％）和出色的稳定性.这种简便高效的制备方法以及较高的SERS活性，使得DVD衍生的SERS基底成为开发便捷和一次性传感平台的较佳选择.     

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