高感度、高分辨率聚酯型光致抗蚀剂—聚呋喃丙烯叉丙二酸-1,3-丙二酯的研制及其应用

以改进后的高分子反应法制得了聚呋喃丙烯叉丙二酸-1,3-丙二酯,合成反应时间短,光敏侧基的引进程度高。其光刻应用的最佳曝光时间为8秒(80W汞灯),分辨率0.75μ,是一种高感度、高分辨率聚酯型光致抗蚀剂的新品种。     

高酸解性聚合物的合成及应用

采用常见的芳香二酸(对苯二甲酸和1,4-萘二甲酸)与1,4-二(2-乙烯氧基乙氧基)苯(1,4-DVEB)聚合,得到了2种新型的芳香酯缩醛聚合物,这些聚合物在各种常用溶剂如丙二醇甲醚醋酸酯(PG-MEA)、二氧六环、乙二醇乙醚中有较好的溶解性,分子量(Mn)3 000~5 000,热分解温度都大于230℃,用DSC测得其玻璃化转变温度在60℃左右.这2种酯缩醛聚合物在室温即可酸解,因此可与光产酸剂等组成无需后烘加热的正性化学增幅型感光成像材料,可用于高感度PS版或UV-CTP版感光剂.     

A lens-like specialization for photic input in the pineal window of an Indian catfish,Heteropneustes fossilis

Summary An unusual lens-like structure is reported in the pineal window of the Indian nocturnal catfishHeteropneustes fossilis. This is the first report of its kind for the pineal window of fishes. This structure, coupled with a pineal fossa and a pineal window, forms a specialization that apparently serves to concentrate the photic input to the intracranially situated pineal organ. This structure may play a significant role in the photoneuroendocrine function of the photosensitive pineal under conditions of low light intensity, controlling the fish's circadian rhythmic activities.The work was financially supported by CSIR, New Delhi (sanction No. 38(693)/88/EMR-II dated May, 1988) which is thankfully acknowledged.     

[Mn(mnt)(phen-5,6-dione)]配合物的光敏性研究

测量了标题配合物[Mn(mnt)(phen-5,6--dione)](mnt2-:1,2-二氰基乙烯-1,2-二硫醇离子.phen-5,6-dione:-1,10-菲咯啉-5,6-二酮)在二甲基亚砜(DMSO)、二甲基甲酰胺(DMF)、丙酮(CH3COCH3)等溶剂中的电子吸收光谱和电子发射光谱特性,报道了掺杂有标题配合物[Mn(mnt)(phen-5,6-dione)]的CdS-PVA复合膜的暗态导电性和光电导性,研究了[Mn(mnt)(phen-5,6-dione)]对CdS的光敏化作用与其电子光谱间的关系.     

SiC薄膜的制备及其光敏特性

采用热丝化学气相沉积(HFCVD)方法,以甲烷、硅烷和氢气为反应气体在单晶硅衬底上沉积碳化硅(SiC)薄膜材料.通过X射线衍射(XRD)、傅里叶变换红外光谱(FTIR)对SiC薄膜的晶体结构进行测试分析.利用原子力显微镜(AFM)对SiC薄膜的表面形貌进行分析.对该薄膜在室温和较高温度(410℃)下进行光敏特性测试,结果表明:该薄膜为SiC薄膜且对不同波长、不同功率的光有一定的敏感特性,较高温度下其敏感特性和室温下测试的结果大体一致,在高温光敏器件领域具有很大的应用潜力.     

痂囊腔菌素A的溴代反应及产物的光敏活性研究

 研究了痂囊腔菌素A的溴代反应,反应得一溴代和二溴代2个产物.用微生物纸片法分别测定痂囊腔菌素A、一溴代和二溴代物的光敏活性.结果表明溴代产物的光敏活性均增强,尤其是二溴代物明显增强.     

Fabrication of high quality UV-written fiber bragg gratings

Conclusion In conclusion, we have reported that 98.5 % peak power reflectivity fiber Bragg gratings were fabricated in the core of B/Ge co-doped optical fiber using 248 nm KrF excimer laser pulses to irradiate a phase mask. The fiber gratings fabricated by the method described above have negligible sideband and good wavelength selectivity. They can find applications in WDM optical fiber transmission systems, fiber grating external cavity semiconductor lasers, and rearearth-doped fiber lasers. But more efforts are needed to further improve the transmission spectra of the gratings, because the ripple in the short wavelength side is harmful to their use in WDM systems.     

A New Route to Hyperbranched Macromolecules :Syntheses of Photosensitive Poly(aroylarylene)s via Regioselective Polycyclotrimerization of Bis(aroylacetylene)s

1Introduction Because of their unique molecular architecture, hyperbranched polymers (hb-Ps) are envisioned to exhibit novel properties, unachievable by their linear congeners, and to serve as advanced functional materials. Realization of the full potential of hb-Ps calls for the exploration of new, versatile methods for their syntheses.     

以SiO2/Si为衬底的Ba1-xLaxNbyTi1-yO3薄膜的敏感特性

通过离子束溅射技术淀积在SiO2/Si衬底上的钛酸镧钡铌膜（Ba1-xLaxNbyTi1-yO3），制成集薄膜电阻和金属－绝缘体－半导体（MIS）电容为一体的传感器。实验结果表明，薄膜电阻在303－673K温度范围内对可见光和热具有良好的灵敏特性，同时MIS电容对相对湿度有很高的灵敏度。我们测试了此薄膜的光吸收特性，并得到了它的禁带宽度。最后，我们研究了薄膜电阻的阻抗温度频率特性和频率对MIS电容湿敏特性的影响。