沉积气压对磁控溅射ZrO2薄膜光性能的影响

为了探究沉积气压对ZrO₂薄膜光学特性的影响规律，以玻璃和硅片为基底，利用射频磁控溅射的方法在不同沉积气压下制备ZrO₂薄膜样品.通过分光光度计测定薄膜在可见光波段的透射光谱，利用椭圆偏振谱仪表征薄膜的折射率、消光系数、厚度等光学参量，利用原子力显微镜观测薄膜表面的微观结构等.结果表明：(1)薄膜的沉积速率随沉积气压的增大而减小，沉积气压为0.4 Pa时沉积速率最大，为0.033 nm/s，沉积气压为1.0 Pa时沉积速率最小，为0.011 nm/s；(2)当沉积气压为1.0 Pa时，200～1 000 nm波段薄膜的平均透射率和折射率均最高，分别为82.71%和2.35，表现出良好的透光性；(3)沉积气压对薄膜消光系数的影响较小；(4)不同沉积气压下制备薄膜的表面粗糙度也不同，沉积气压为1.0 Pa时薄膜的粗糙度最低，为5.5 nm，沉积气压为0.6 Pa时薄膜的粗糙度最高，为25.2 nm.     

大连民族学院在研的国家自然科学基金项目简介（Ⅱ）

一、“利用辉光介质阻挡放电沉积多种功能性薄膜”（编号：10405005） 项目主持人：刘东平 利用介质阻挡放电在沉积DLC薄膜方面的优势，将该方法移植至其他功能，性薄膜（如a-Si：H、SiO2、a-C：N、TiO2等）的制备研究中，分析薄膜特性，开创新的研究工作；对脉冲辉光放电形成过程及等离子体鞘层活性物种种类、能量及密度进行模拟，结合对薄膜在原子水平上的分析结果，研究薄膜的低能沉积和高能溅射过程，分析薄膜沉积机理。     

顺序离子束溅射沉积制备GdAlO3单一晶相薄膜技术

顺序沉积薄膜制备技术包括前驱薄膜制备和后期薄膜热处理技术，特别适合复杂组分的薄膜制备．采用IM100离子束材料芯片沉积仪在MgO(100)基片上顺序沉积Gd2O3和Al单层薄膜，经后续低温扩散和高温晶化两步热处理得到GdAlO3单一晶相薄膜．以X射线衍射(XRD)、扫描电镜(SEM)等手段，分析所得GdAlO3薄膜的晶体结构和微观形貌，考察热处理过程对GdAlO3薄膜生长过程及微观结构的影响．实验结果表明顺序沉积薄膜制备技术具有化学计量比控制精确的优点，两步热处理可以得到结晶状况良好的单相结晶薄膜．     

氩离子束溅射沉积PTFE高分子膜

用氩离子束溅射聚四氟乙烯靶材，在黄铜上沉积聚四氟乙烯薄膜，用ＸＰＳ和ＩＲＳ分析方法确定了聚四氟乙烯高分子膜的存在，并依据沉积膜形成过程对沉积膜与靶材在ＩＲＳ谱图上的差异给予了解释，结果表明，这种溅射沉积方法形成高分子薄膜是有效的。     

化学气相沉积金刚石薄膜的表面过程

采用简单表面反应模式，对化学气相沉积金刚石薄膜的表面动力学过程进行了研究，得到了金刚石薄膜的沉积速率公式，揭示了影响薄膜生长的因素并由此讨论了金刚石薄膜生长的机制和规律。     

脉冲激光沉积类金刚石薄膜的厚度均匀性建模

在脉冲激光沉积类金刚石薄膜过程中,针对薄膜均匀性差的问题,提出偏轴沉积、脉冲激光扫描沉积、双光束沉积和多光束沉积等模式来改善薄膜的均匀性。初步建立了脉冲激光沉积类金刚石薄膜厚度均匀性模型,并分别进行了薄膜厚度分布的模拟,在模拟过程中,强调了在不影响薄膜性能的基础上改善薄膜均匀性,并讨论了沉积模式对薄膜颗粒物问题的影响。结果表明,采用多光束沉积薄膜,厚度均匀性得到极大改善,而且颗粒物问题也得到了改善。最后提出模型改良意见。     

离子束辅助对真空电弧沉积掺氮二氧化钛薄膜特性的影响

在氮氧混合气体中，通过离子束辅助，采用真空电弧沉积了氮掺杂的TiO2薄膜样品，研究了离子束流对掺氮二氧化钛薄膜的结构、光学性质和光催化性能的影响。实验结果表明：离子束辅助沉积的薄膜为非品态结构，薄膜经500℃热处理后向锐钛矿转变，且锐钛矿的（101）面的峰最强。通过UV分析发现离子束辅助沉积的掺氮二氧化钛薄膜的吸收峰发生红移，其光催化活性随着离子束流的增大而减小。     

热处理条件对热蒸镀WO3薄膜结构的影响

采用高真空热蒸发沉积技术在硅单晶Ｓｉ（１１１）衬底上沉积了ＷＯ３薄膜，借助化学刻蚀，ＳＥＭ，ＸＲＤ和Ｒａｍａｎ光谱分析等手段，了不同的热处理条件对ＷＯ３薄膜结构的影响，结果表明，在真空条件下或干燥Ａｒ气氛条件下对薄膜进行退火热处理有利于控制薄膜晶粒的生长，同时有利于增强薄膜的稳定性。     

单源低能离子束辅助沉积类金刚石薄膜摩擦性能研究

采用单源低能离子束辅助沉积的方法，制备了非晶碳薄膜，分别用喇曼光谱，俄歇电子能谱了薄膜的结构，薄膜为无定形的类金刚石薄膜，薄膜中石墨键（ＳＰ＾２）所占的比重较大，沉积时随着离子束能量及束流的增加，薄膜的显微硬度，摩擦系数，摩擦寿命均增加，类金刚石薄膜具有较好的摩擦性能。     

衬底对沉积类金刚石薄膜结构和摩擦学性能的影响

利用直流-射频等离子化学气相沉积技术在玻璃、硅和钢表面沉积得到了薄膜,并用拉曼光谱和原子力对薄膜的结构和形貌进行了表征,用静动摩擦实验机对薄膜的摩擦学性能进行了测试．结果表明：沉积在硅和钢表面的薄膜具有典型类金刚石薄膜的特征,而沉积在玻璃表面的薄膜呈现类聚合物结构的特征,且沉积在玻璃表面的薄膜具有比较粗糙的表面,而沉积在硅表面的薄膜则比较光滑致密．摩擦学实验表明,沉积在硅表面的薄膜具有良好的摩擦学性能．     

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.     

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     

Journal of Donghua University ( English Edition) Contents of Volume 31

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