钢渗铬层上金刚石薄膜的表面、界面结构及附着性

在钢渗铬层表面用化学气相沉积(CVD))法制备了金刚石薄膜.使用扫描电镜(SEM)、透射电镜(TEM)和压痕法研究了金刚石膜的表面、界面结构及附着力.用拉曼光谱分析了金刚石膜的纯度及非金刚石碳相.甲烷含量超过0.6%(体积分数)后,金刚石膜为球形纳米晶,形核密度＞107cm-2.用甲烷含量为0.6%(体积分数)沉积的金刚石膜表面的残余压应力为1.22 Gpa,而膜背面的残余压应力更高,达2.61 Gpa.压痕显示在19.6 N载荷下膜发生开裂.TEM观察发现,膜/基界面为微观非平面,有利于提高金刚石膜的附着力.     

圆柱谐振腔式MPCVD装置中氢、氩微波等离子体分布规律的数值模拟

在使用简化的等离子体放电模型的基础上,模拟了圆柱谐振腔式微波等离子体沉积室中,不同金刚石膜生长条件下微波等离子体的分布状态。在模拟中,针对纳米金刚石的生长环境,就纯氩气反应气体中,不同的输入功率、不同气体压力条件下,沉积室中形成的等离子体分布的变化规律进行了模拟,将其与一般氢气气氛下的相应模拟结果相对比。模拟所获得的结果,对微波等离子体方法沉积金刚石膜的操作环境的优化,有着一定的指导意义。     

PS-b-PNIPAAm嵌段共聚物多孔薄膜的制备及形貌研究

将两亲性PS-b-PNIPAAm嵌段共聚物(BCP)溶解在四氢呋喃中配制成浓度为2%(质量分数)的溶液,旋涂后得到初生嵌段共聚物薄膜,以乙醇为退火溶剂退火后,探讨了退火时间对薄膜微孔结构的影响,结果表明,随着退火时间的延长,膜表面的微相分离越明显,微孔结构的分布更均匀。进一步将在乙醇中退火预处理的薄膜分别在乙醇或去离子水中进行溶胀处理,通过选择性溶胀成孔法制备PS-bPNIPAAm纳米多孔膜。研究了溶胀时间、温度及溶剂类型对薄膜形貌的影响,结果发现升高溶胀温度和延长溶胀时间均有助于膜表面微孔结构的形成,且该过程中乙醇的成孔作用比水的作用更为明显。     

金刚石的同质外延掺硼和Schottky特性

在＜１００＞取向的金刚石衬底上，用微波ＰＣＶＤ法进行同质外延，掺杂和Ｓｃｈｏｔｔｙ特性的实验研究，总结了反应气体，碳源浓度等因素对外延层形貌、结构的影响，Ｂ／Ｃ比对掺硼外延层结构、形貌和电学性能的影响，以及接触金属，温度对Ｓｃｈｏｔｔｋｙ特性的影响。     

纳米晶薄膜Li_xPb_(0.9-x)La_(0.1)TiO_3合成及离子电导特性

纳米晶薄膜LixPb0.9-xLa0.1TiO3（x=0，0．1，0．2，0．6）以普通玻璃为衬底通过溶胶—凝胶方法烧结制备而成。对LPLT薄膜进行DTA，XRD等测试手段分析。通过交流阻抗数据的分析，在室温下电导率高达2．3×10－3S·cm-1     

Application of Magnetron Sputtering in Fabricating MEMS Microbatteries

With the development of MEMS and the electronic devices's miniaturization and integration, a new kind of power sources that can satisfy the need for high energy density is required. Microbatteries are being researched abroad for their advantages of extreme thinness and long-term power supply. The development of MEMS microbatteries are reviewed and suggestedmagnetron sputtering in fabricating a high-performance microbattery. The technics as annealing are analyzed. The microbattery with a LiNi1-x Cox O2 cathode exhibited stable cycle ability and a high specific discharge capacity, which was attributed to the alloying effect of the LiNiO2and LiCoO2.     

Formation of structure of the CdTe film, recrystallized on Mo/glass substrate under high temperature and mechanical pressure

Large-grained and 7 μm thick CdTe film has been fabricated on top of Mo coated soda-lime glass substrate. As a new approach the dynamic recrystallization process (DRC) was used to form the structure of films. For the characterization of the structure and composition of the films a scanning electron microscopy (SEM), energy dispersive X-ray microanalysis (EDS) and X-ray diffraction (XRD) methods were used. The changes in the structure of films were studied in accordance with the process temperature, pressure and as-deposited film thickness. Significant changes in the CdTe film were observed after DRC of deposited films at the process temperatures between 450 °C and 550 °C. EDS quantitative analysis showed that during the recrystallization the Mo and CdTe films composition remained stable for all studied samples. The XRD results showed that the increase in the process temperature caused improvement in orientation of the films along direction of (111). The DRC temperature above 550 °C reduced the orientation again. The limits of the temperature and pressure in application of soda-lime glass in DRC were found and discussed.     

轿车发动机电控喷射系统用新型传感器的开发

天津大学在国家“８６３”新材料领域的资助下,研制开发新型氧敏薄膜材料,研制出近百个Ａ／Ｆ传感器样件。该样件材料新颖,结构简单,响应速度快,成本低,具有独立知识产权。装在夏利车上,与国外生产进行了排放控制试验比较。试验结果表明,控制能力达到国外生产件水平;响应速度比后者快。     

The Potential Role of SP-G as Surface Tension Regulator in Tear Film: From Molecular Simulations to Experimental Observations

The ocular surface is in constant interaction with the environment and with numerous pathogens. Therefore, complex mechanisms such as a stable tear film and local immune defense mechanisms are required to protect the eye. This study describes the detection, characterization, and putative role of surfactant protein G (SP-G/SFTA2) with respect to wound healing and surface activity. Bioinformatic, biochemical, and immunological methods were combined to elucidate the role of SP-G in tear film. The results show the presence of SP-G in ocular surface tissues and tear film (TF). Increased expression of SP-G was demonstrated in TF of patients with dry eye disease (DED). Addition of recombinant SP-G in combination with lipids led to an accelerated wound healing of human corneal cells as well as to a reduction of TF surface tension. Molecular modeling of TF suggest that SP-G may regulate tear film surface tension and improve its stability through specific interactions with lipids components of the tear film. In conclusion, SP-G is an ocular surface protein with putative wound healing properties that can also reduce the surface tension of the tear film.