铝诱导晶化非晶硅薄膜研究

应用晶化非晶硅（a—Si）薄膜铝诱导方法，采用X射线衍射（X-ray diffraction，XRD）、光学显微镜（Optical Microscopy，OM）和原子力显微镜（Atomic Force Microscopy，AFM）等测试手段，研究了退火条件对样品晶化的影响．结果表明，样品在300℃下退火后仍为非晶态；退火温度为400℃时，样品开始晶化．随着退火时间的增加，薄膜晶化程度越来越高，晶粒越来越大，同时薄膜表面粗糙度增加．     

纳米膜与硅烷化表面修饰相结合制备基因芯片载体

将洁净的玻片,在以溶胶-凝胶法制备的TiO2胶体溶液中浸渍提拉成膜,再将组装纳米薄膜的玻片进行硅烷化处理.用傅里叶变换红外光谱、扫描电镜、荧光显微镜对样品进行表征.结果表明,带氨基或醛基的“手臂分子“可以固定在纳米薄膜组装的玻片上,并且荧光信号强于仅用硅烷化处理的玻片.本研究建立的芯片载体表面化学修饰方法有较高的效率,操作简便易行,具备广阔的应用前景.     

MgB_2超导材料的薄膜制备及其超导器件的实现

报道了采用电子束蒸发技术实现MgB2薄膜制备的实验工作。通过蒸镀B膜和Mg/B多层膜两种前驱体,分别经高温区(~900℃)和中温区(~700℃)退火处理后成功获得了高质量的MgB2薄膜样品。对样品的超导性能、晶体结构和表面形貌进行了详细的测量和表征,并对两类样品性质上所表现出的差异进行了分析。此外,还报道了在薄膜制备基础上利用微加工技术实现的超导微波谐振器的结果。     

Influences of Copolymer Composition upon the Behaviors of Poly（vinyl acetate-co-acrylamide） Sizing Agents

A series of poly(vinyl acetate-co-acrylamide)copolymers with different mole ratios of vinyl acetateto acrylamide units were synthesized by emulsionpolymerization for investigating the influences of copolymercompostion upon the performance such as apparentviscosity, film behaviors, and adhesion capacity to fibers forwarp sizing operation. The mole ratios of vinyl acetate toacrylamide were varied from 0 to 4. By using animpregnated roving method, the adhesion was evaluated interms of the maximal strength and work to break of aslightly sized roving. The film behaviors included breakingstrength, breaking elongation, solution time and hygroscopiccapacity. It was found that the viscosity, adhesioncapability, glass transition temperature and film behaviorsof the copolymeric sizing agent strongly depended on themole ratio. Excessively increasing the amounts of vinylacetate or acrylamide units incorporated into the copolymericchains damages much of the performance. A favorable moleratio of vinyl acetate or acrylamide was found to be 45 : 55.Based on this mole ratio, the adhesion capability and filmbehaviors of the sizing agent reach their maximal valuessimultaneously. This demonstrates that the sizing agentshould be synthesized under this copolymer composition fromthe viewpoint of adhesion and film behaviors.     

Preparation and Properties of Cereal-Metal Complex Films

1 Results Various kinds of biodegradable polymer materials have been researched[1]. In our previous papers,cereals such as wheat,buckwheat,glutinous rice and nonglutinous rice were polycondenced with citric acid and polysilicic acid to prepare copolymer films respectively[2,3].These copolymer fims have relatively good mechanical properties but the water proofness is not so good.Recently,some cereals such as wheat,glutinous rice,nonglutinous rice,kaoliang,millet and maize were reacted with copper chlorid...     

纺缍形α-Fe2O3/聚苯乙烯复合高分子微球的制备、表征及等电性研究

以纺缍形α-Fe2O3超微粉为内核，过硫酸钾为引发剂，聚乙二醇为分散剂和稳定剂，乙醇／水为分散介质，苯乙烯为单体，用改进的分散聚合法合成了核／壳型纺锤形的高分子微球，并用XRD、TEM和IR进行了表征。粒子的分散性较好，粒径分布窄。由于亲水性的α-Fe2O3与亲油性的苯乙烯亲合性较差，在实验中采用了超声分散、预先溶胀和预先吸附引发剂、分散剂的方法，增强了粉末表面的亲油性，合成的高分子微球，其长轴平均为0．26μm，短轴平均为0．09μm，轴比为2．9，同时测定了不同pH值时粒子包膜前后的Zeta电位值，并根据粒子等电点的变化计算出包膜厚度，与电镜照片的结果比较吻合。     

对入射角高度稳定的消色差相位延迟器

探讨了一类对入射角高度稳定的消色相位延迟器的设计方案，首先选取合适的全反射角，然后通过在全反射界面蒸镀一定厚度的光学介质膜对中心波长处的相位延迟进行补偿，结果不仅可以改善相位延迟对入射角的稳定性，而且可以大大提高器件的消色差性。     

用介质膜特性矩阵设计反射干涉滤光片

从介质膜的特性矩阵和菲涅耳公式出发 ,推导出设计反射干涉滤光片的基本公式 ,并给出了具体的设计方法     

反渗透法处理工业废水

本文通过处理电镀废水和印染废水，采用反渗透法处理工业废水，并进行了一系列的实验，取得了经济易得的反渗透膜，使处理废水可以回用，并可做成封闭循环无排放系统。     

纳米孔阵列阳极氧化铝膜的制备与形貌观测

报道了用阳极氧化法在高纯铝片上制备含有纳米孔阵列的阳极氧化名膜技术，并用原子力显微镜（AFM）和扫描电子显微镜（SEM）对样品形貌进行了分析。结果表明，阳极氧化处理后的铝片明显地分成了未反应的铝、阻挡层氧化铝和多孔层氧化铝3层结构，且阻挡层处在铝和多孔层之间，具有弧形底部。多孔层氧化铝中孔的大小约为50nm，孔间距约为100nm，且这些孔有规律地排列形成纳米孔阵列。