锑在弱碱溶液中阳极形成膜半导体性质的研究

采用交流阻抗和白光电流测量法,研究了锑在恒电位1.2V(VS.SCE)于0.025mol.dm-3Na2CO3+0.025mo1.dm-3Na2HCO3+0.500mol.dm-3Na2SO4(PH=9.98,30℃)缓冲溶液中阳极形成膜半导体性质.实验证明,该阳极氧化膜是一种n-型半导体,其平带电位Efb和施主密度ND分别为-0.53V(VS.SCE)和2.86×1018cm-3.     

ZrO2介质膜的光热吸收研究

报道了用直流反应溅射法在低氧分压条件下(6.0×10-3～8.0×10-3Pa)沉积ZrO2介质膜的制备工艺,XRD分析表明该条件下制备的ZrO2介质膜结构均为非晶态,表面光热技术测量其在10.6μm波长下的吸收系数为1.223×10-3～1.285×10-3cm-1,且吸收率随氧分压的升高而降低.这表明,表面光热测量是一种既简单又有很高灵敏度的实时检测技术,而在直流反应溅射法中氧分压是一个非常敏感的工艺参数,并显著地影响着膜层的光吸收.     

Ⅲ.小面积绒面SnO_2透明导电膜研制成功

二氧化锡(SnO_2)薄膜是具有宽光学带隙的 N 型半导体薄膜,在可见光范围内具有很高的透过率,是非晶硅太阳电池理想的透明导电抗反射膜。我校物理系半导体研究室采用常压 CVD 技术,研制成功的这种小面积掺氟绒面 SnO_2透明导电膜,主要技术参数为:电阻率7×10~(-4)Ω·cm,总透过率硅≥90%。南开大学用这种 SnO_2膜研制出了面积为12.6nm~2、转换效率为7.2%的非晶硅太阳能电池。此结果与使用日本的某些     

锑在硫酸溶液中阳极形成膜半导体性质的研究(Ⅰ)

本工作研究了锑电极在0.9V(VS. Hg/Hg_2SO_4)分别于4.5mol/LH _2SO_4和0.05mol/LH_2SO_4+0.5mol/LNa_2SO_4溶液中,恒电位阳极成膜3小时后膜的主要组成及其生长规律以及膜的半导体性质。x射线衍射分析、线性电位扫描证实锑在上述两种溶液中阳极膜的组成不同,前者主要由Sb_2O_3和Sb_2(SO_4)_3组成,后者是Sb_2O_3。交流阻抗测量和白光电流分析,前者是一种无定形n-型半导体,后者是晶形半导体且平带电位和载流子密度分别为-0.31V(VS. Hg/Hg_2SO_4/0.05mol/LH_2SO_4)和4.0×10~(19)cm~(-3)。     

离子注入聚醚砜膜的光电特性研究

用15keV的N+或Ar+注入聚醚砜（PolyetherSulfone简称PES）薄膜,在D＝3×10（16）ions／cm2时,纯PES膜表面电导率提高了五个数量级,掺碘PES膜表面电导率提高了四个数量级。在D＝3×10(16)ions／cm2时,离子注入PES膜的表面电导率已达到半导体水平且在大气中非常稳定。离子注入引起PES膜先吸收率显著增加。     

近红外光区一维光子晶体高反射镜的设计

研究设计了适用于近红外光区(1 000～2 000nm)且具有异质结构的一维光子晶体宽禁带高反射镜.选取TiO2和SiO2两种常见材料构造一维光子晶体的异质结构,采用传输矩阵的方法计算光子晶体的反射率;并通过数值模拟分析横磁波(TM)和横电波(TE)从空气介质中入射时光子晶体的反射谱.结果表明:设计的具有异质结构的一维光子晶体对TM波在0°～20°和TE波在0°～25°均有较高的反射率(大于0.999 98).设计的宽禁带高反射镜是为了适应可调红外气体激光器和半导体红外可调器谐振腔激光技术发展的需要,也可代替带宽窄、反射率低的传统反射镜应用于各种近红外光谱仪.     

反射率极值法监控薄膜淀积的计算机模拟

利用计算机计算薄膜在反射率极值法监控的镀膜系统上淀积时监控片反射率的实时变化并模拟薄膜的实际淀积过程,得出设计膜系在一定制备工艺条件下所获得成膜的膜系结构,根据模拟结果计算的光学特性曲线与实际淀积出的成膜实测值相吻合.     

基于VC的自动化镀膜仪控制系统研究

文章针对双光路膜厚监控原理,设计了双锁相放大电路、复合滤波处理和数字判断等一套微弱信号优化处理方案,并在VC 6.0集成开发环境下进行自动化监控。实验结果表明:膜厚监控系统的低反射率膜的反射率显示分辨极限为0.02%,膜厚控制的标准偏差为0.55%;软件控制系统工作可靠,界面设计友好,人机互动性强,图标和状态指示器等特色界面丰富了界面功能和方便了用户。在对监控信号的高稳定和高精度检测基础上用VC实现了镀膜全部工艺过程的自动化,并且性能价格比优于同类镀膜设备系统。     

ITO透明半导体膜的研究

采用直流磁控溅射ITO陶瓷靶的高温低氧工艺,在玻璃衬底上成功地镀制了ITO透明半导体膜,其可见光透过率达80％以上,电阻率降到3×10~(-4)(?)cm以下。     

液相金纳米粒子的分频和倍频散射光谱研究

采用微波高压液相合成法制备了金纳米粒子.当激发波长为290 nm(1.03×1015 Hz)时在580 nm(1/2×1.03×1015 Hz)和870 nm(1/3×1.03×1015 Hz)分别产生一个1/2分频和1/3分频散射峰;当激发波长为580 nm(5.02×1014 Hz)时在290 nm(2×5.02×1014 Hz)和870 nm(2/3×5.02×1014 Hz)分别产生一个2倍频和2/3分频散射峰;当激发波长为870 nm(3.34×1014 Hz)时在580 nm(3/2×3.34×1014 Hz)和290 nm(3×3.34×1014 Hz)分别产生一个3/2分频和3倍频散射峰.分频散射和倍频散射峰与共振散射峰具有相似的散射行为.提出了液相纳米粒子的分频、和频、差频原理,解释了金纳米粒子的各种散射光谱.     

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.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

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.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

Jane Eyre——A Feminist In The 19th Century

In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.     

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-