氩氧气氛下沉积的CdTe薄膜及太阳电池的性质

研究了在氩氧气氛下近空间升华沉积CdTe的技术．发展了在表面十分平整的玻璃衬底上沉积优质CdTe薄膜的方法,对比了在玻璃衬底和CdS薄膜上CdTe薄膜的结构特征．通过研究氧分压对CdTe薄膜择优取向的影响,证实了在恰当的近空间升华沉积过程中,两种衬底上的CdTe薄膜具有相同的结构．研究了玻璃衬底上CdTe薄膜的电学与光学性质,观察了后处理对上述薄膜性质的影响,并研制出了效率达1338%的小面积CdTe 薄膜太阳电池．     

液晶盒厚度的反射光谱拟合法测量

介绍了一种测量液晶盒厚度的新型光学方法——反射光谱拟合法。理论上,液晶盒的反射光谱呈正弦曲线,且曲线取极值时对应入射光波长大小值取决于所用液晶盒的厚度。反之亦然,当得知液晶空盒的反射光谱时,可以根据曲线取极值时入射光波长的值来获得待测液晶盒的厚度。软件用来搜索与实验测试数据相互吻合的液晶盒厚度。该技术以白光作为液晶盒的前端光源,且白光入射角为0°。结果表明,该方法测量范围5 ～30μm,测量重复误差0 .1μm以下。实验中,光纤光谱仪用来测试反射光谱,并通过USB接口将其传输到计算机。该方法的优点是它可以在0 .1 s内测试液晶盒表面任意点处的厚度,有较强的使用价值。     

固体氧化物燃料电池发展及展望

在21世纪的今天,能源和环境对人类的压力越来越大.当人们把能源供应仍然寄托于煤的综合利用为主时,可以直接使用多种碳基燃料的高温固体氧化物燃料电池(SOFC)发电技术将是新型高效洁净能源的有效途径之一.在发展大型电站技术的同时,固体氧化物燃料电池作为分布式电站和备用电源技术及示范工程蓬勃开展.世界范围内,各种相关鼓励SOFC快速发展的政策陆续出台.千瓦量级的SOFC发电系统将在军方首先试用,多国联合的SOFC商业化进程正在加速实施.     

统一交换技术的研究和实现

文章介绍了统一交换原理和实现统一交换的关键技术,包括信元交换技术和 SAR(切割与重组)技术,给出了统一交换设备实现功能框图,讲述了设计中需要关注的交换效率、时延、交换板冗余保护和交换容量计算等方面的问题。该文的成果已经在光传输设备上得到应用,并取得了良好的效果。该技术具有明显的优势,是构成下一代通信网络的关键技术之一。     

天和家园43kWp屋顶并网光伏发电系统设计

介绍了浙江省慈溪市天和家园住宅小区43kWp屋顶太阳能并网光伏发电系统的设计思路,以及系统的具体功能与配置,提出了设计中需要注意的问题及具体的解决方案。包括:①光伏系统提供公用设施用电,在阴雨天时使用城市电网为公用负荷供电;②光伏系统在小区内局部并网,不考虑将电能输入上级城市电网;③太阳能电池组件方阵倾角确定为30°,选用常州天合光能有限公司生产的TSM-175D型高效单晶硅电池组件,分析了组件分组串接原则,确定了布置方案;④并网逆变器选择德国艾思玛(SMA)公司的SMC6000TL型无变压器集中式逆变器和SB5000TL型无变压器多组串逆变器;⑤地下车库照明负荷曲线与日照曲线接近,因此选择地下车库照明和智能化设备用电为光伏系统负荷;⑥简介了防直击雷和防感应雷措施,以及选择电缆和设计支架时应考虑的因素;⑦监控系统选用SMA的Sunny Boy ControlPlus产品。     

Biocompatibility and Mechanical Stability of Nanopatterned Titanium Films on Stainless Steel Vascular Stents

Nanoporous ceramic coatings such as titania are promoted to produce drug-free cardiovascular stents with a low risk of in-stent restenosis (ISR) because of their selectivity towards vascular cell proliferation. The brittle coatings applied on stents are prone to cracking because they are subjected to plastic deformation during implantation. This study aims to overcome this problem by using a unique process without refraining from biocompatibility. Accordingly, a titanium film with 1 µm thickness was deposited on 316 LVM stainless-steel sheets using magnetron sputtering. Then, the samples were anodized to produce nanoporous oxide. The nanoporous oxide was removed by ultrasonication, leaving an approximately 500 nm metallic titanium layer with a nanopatterned surface. XPS studies revealed the presence of a 5 nm-thick TiO₂ surface layer with a trace amount of fluorinated titanium on nanopatterned surfaces. Oxygen plasma treatment of the nanopatterned surface produced an additional 5 nm-thick fluoride-free oxide layer. The samples did not exhibit any cracking or spallation during plastic deformation. Cell viability studies showed that nanopatterned surfaces stimulate endothelial cell proliferation while reducing the proliferation of smooth muscle cells. Plasma treatment further accelerated the proliferation of endothelial cells. Activation of blood platelets did not occur on oxygen plasma-treated, fluoride-free nanopatterned surfaces. The presented surface treatment method can also be applied to other stent materials such as CoCr, nitinol, and orthopedic implants.     

Electron Transfer in a Bio-Photoelectrode Based on Photosystem I Multilayer Immobilized on the Conducting Glass

A film of ~40 layers of partially oriented photosystem I (PSI) complexes isolated from the red alga Cyanidioschyzon merolae formed on the conducting glass through electrodeposition was investigated by time-resolved absorption spectroscopy and chronoamperometry. The experiments were performed at a range of electric potentials applied to the film and at different compositions of electrolyte solution being in contact with the film. The amount of immobilized proteins supporting light-induced charge separation (active PSI) ranged from ~10%, in the absence of any reducing agents (redox compounds or low potential), to ~20% when ascorbate and 2,6-dichlorophenolindophenol were added, and to ~35% when the high negative potential was additionally applied. The origin of the large fraction of permanently inactive PSI (65–90%) was unclear. Both reducing agents increased the subpopulation of active PSI complexes, with the neutral P700 primary electron donor, by reducing significant fractions of the photo-oxidized P700 species. The efficiencies of light-induced charge separation in the PSI film (10–35%) did not translate into an equally effective generation of photocurrent, whose internal quantum efficiency reached the maximal value of 0.47% at the lowest potentials. This mismatch indicates that the vast majority of the charge-separated states in multilayered PSI complexes underwent charge recombination.     

Glioblastoma Stem Cells—Useful Tools in the Battle against Cancer

Glioblastoma stem cells (GSCs) are cells with a self-renewal ability and capacity to initiate tumors upon serial transplantation that have been linked to tumor cell heterogeneity. Most standard treatments fail to completely eradicate GSCs, causing the recurrence of the disease. GSCs could represent one reason for the low efficacy of cancer therapy and for the short relapse time. Nonetheless, experimental data suggest that the presence of therapy-resistant GSCs could explain tumor recurrence. Therefore, to effectively target GSCs, a comprehensive understanding of their biology and the survival and developing mechanisms during treatment is mandatory. This review provides an overview of the molecular features, microenvironment, detection, and targeting strategies of GSCs, an essential information required for an efficient therapy. Despite the outstanding results in oncology, researchers are still developing novel strategies, of which one could be targeting the GSCs present in the hypoxic regions and invasive edge of the glioblastoma.     

基于钻孔资料的三维数字地层格架自动生成技术研究

三维数字地层格架自动生成技术研究是对地质体三维自动建模的初步探讨。基于钻孔资料,通过数字化、三角剖分,地层对比等数值计算与非数值计算,把建模生成分解为垂直地层界面伸展方向与平行地层界面伸展方向两个相互独立的过程,采用线性插值法先自动模拟生成地层格架元,再依据格架元之间的数值关系进行模型整合形成地层格架体。